Compound essential oil for improving dull skin and preparation method therefor

Abstract

Disclosed is a compound essential oil for improving dull skin, which comprises the following components: oleic acid, linoleic acid, palmitic acid, stearic acid, limonene, α-pinene, linalool, palmitoleic acid, eicosanoic acid, squalene, α-copaene, cis-11-eicosenoic acid, β-pinene, trans-caryophyllene, 3-thujene, camphene, behenic acid, myristic acid, p-cymene, (+)-δ-cadinene, menthol, linolenic acid, caprylic acid, menthone, capric acid, sabinene, and myrcene. The compound essential oil has excellent effects of skin whitening, brightening, and moistening.

Description

Compound essential oil for improving dull skin tone and preparation method thereof Technical Field

[0001] The present invention relates to the field of medical technology, in particular to a compound essential oil for improving dull skin tone and a preparation method thereof. Background Art

[0002] Because the formation and appearance of melanin in the skin takes time, as UV exposure intensifies, the human skin system initiates various defensive responses. However, this defense mechanism activates various enzymes to produce melanin, of which tyrosinase is the most important. It oxidizes tyrosine to dopa, which is then further oxidized to dopaquinone. This is then oxidized and polymerized by other enzymes to form melanin. Melanin is present in the basal layer of the skin and migrates through cellular metabolism to the epidermis, causing skin problems such as dark spots and uneven skin tone.

[0003] Because the damage caused by ultraviolet rays to the skin has a cumulative and superimposed effect, excessive melanin deposition naturally makes the skin look darker. In addition, abnormal melanin deposition can also lead to uneven pigment distribution and the appearance of spots and other problems. In addition, there are some indirect factors that can also affect human skin color. For example, (1) Dehydration of the skin: Dehydration of the skin not only leads to rough pores, but also causes dull skin color. (2) Oxidation of keratin: Electromagnetic radiation can stimulate the body to produce excessive free radicals. These free radicals can oxidize the skin's stratum corneum, making it unable to metabolize and renew, thus causing a dull complexion. (3) Some physical diseases such as anemia can also make the face look dull.

[0004] Conventional treatments for improving dull skin include: (1) using skin-lightening products, but continuous sun protection is required during use, otherwise pigmentation will reappear; (2) makeup: using foundation; (3) surgery: laser, acid peels, and microdermabrasion are effective, but there is a risk of causing post-inflammatory pigmentation; (4) medication: the commonly used medication is a combination of hydroquinone and retinoic acid, which needs to be used daily, combined with exfoliation and sun protection, and usually reduces abnormal pigmentation within 8 to 12 weeks; (5) functional cosmetics: kojic acid, acid, licorice root, water-soluble derivatives of vitamin C, hexylresorcinol, pterostilbene, 1-methylhydantoin-2-imide. Currently, there is still a lack of safer and more effective topical medications.

[0005] The present invention provides a compound essential oil for improving dull skin tone. This is a nursing project from the inside out, which can inhibit the activity of tyrosinase and block the production of melanin, the culprit that affects skin tone.

[0006] Summary of the Invention

[0007] To overcome the defects or deficiencies of the prior art, the primary purpose of the present invention is to provide a compound essential oil for improving dull skin tone. A secondary purpose of the present invention is to provide a method for preparing the compound essential oil for improving dull skin tone.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] As a first aspect of the present invention, a compound essential oil for improving dull skin tone comprises the following components in parts by weight: 50-59 parts of oleic acid, 23-27 parts of linoleic acid, 9-13 parts of palmitic acid, 3-7 parts of stearic acid, 0.2-0.6 parts of limonene, 0.1-0.5 parts of α-pinene, 0.1-0.5 parts of linalool, 0.01-0.4 parts of palmitoleic acid, 0.01-0.4 parts of eicosanoic acid, 0.01-0.4 parts of squalene, 0.01-0.4 parts of α-copaene, 0.01-0.4 parts of cis-11-eicosenoic acid, 0.01-0.4 parts of β-pinene, and 0.01-0. .3 parts, trans-caryophyllene 0.01-0.3 parts, 3-thujene 0.01-0.3 parts, camphene 0.01-0.2 parts, behenic acid 0.01-0.2 parts, myristic acid 0.01-0.2 parts, p-cymene 0.01-0.2 parts, (+)-δ-cuberene 0.01-0.2 parts, menthol 0.01-0.2 parts, linolenic acid 0.01-0.2 parts, caprylic acid 0.01-0.2 parts, menthone 0.01-0.2 parts, capric acid 0.01-0.2 parts, sabinene 0.01-0.2 parts, myrcene 0.01-0.2 parts.

[0010] Furthermore, the compound essential oil for improving dull skin tone comprises the following components in parts by weight: 53-58 parts of oleic acid, 24-26 parts of linoleic acid, 10-12 parts of palmitic acid, 4-6 parts of stearic acid, 0.3-0.5 parts of limonene, 0.2-0.4 parts of α-pinene, 0.2-0.4 parts of linalool, 0.1-0.3 parts of palmitoleic acid, 0.1-0.3 parts of eicosanoic acid, 0.1-0.3 parts of squalene, 0.1-0.3 parts of α-copaene, 0.1-0.3 parts of cis-11-eicosenoic acid, 0.05-0.2 parts of β-pinene, Formula: 0.05-0.2 part of caryophyllene, 0.05-0.2 part of 3-thujacene, 0.01-0.1 part of camphene, 0.01-0.1 part of behenic acid, 0.01-0.1 part of myristic acid, 0.01-0.1 part of p-cymene, 0.01-0.1 part of (+)-δ-cuberene, 0.01-0.1 part of menthol, 0.01-0.1 part of linolenic acid, 0.01-0.1 part of caprylic acid, 0.01-0.1 part of menthone, 0.01-0.1 part of capric acid, 0.01-0.1 part of sabinene, and 0.01-0.1 part of myrcene.

[0011] Furthermore, the compound essential oil for improving dull skin tone comprises the following components in parts by weight: 57 parts of oleic acid, 25 parts of linoleic acid, 11 parts of palmitic acid, 5 parts of stearic acid, 0.4 parts of limonene, 0.3 parts of α-pinene, 0.3 parts of linalool, 0.2 parts of palmitoleic acid, 0.2 parts of eicosanoic acid, 0.2 parts of squalene, 0.2 parts of α-copaene, 0.2 parts of cis-11-eicosenoic acid, 0.2 parts of β-pinene, and 0. 1 part, trans-caryophyllene 0.09 part, 3-thujene 0.05 part, camphene 0.04 part, behenic acid 0.04 part, myristic acid 0.04 part, p-cymene 0.04 part, (+)-δ-cuberene 0.03 part, menthol 0.03 part, linolenic acid 0.03 part, caprylic acid 0.02 part, menthone 0.03 part, capric acid 0.02 part, sabinene 0.01 part, myrcene 0.01 part.

[0012] As a second aspect of the present invention, a method for preparing a compound essential oil for improving dull skin tone comprises the following steps:

[0013] Step S1: extracting sweet almonds by a refining method to obtain oleic acid, linoleic acid, palmitic acid, stearic acid, palmitoleic acid, behenic acid, cis-11-eicosenoic acid, and linolenic acid;

[0014] Step S2: extracting argan and cactus seeds by cold pressing to obtain oleic acid, linoleic acid, palmitic acid, stearic acid, palmitoleic acid, eicosanoic acid, cis-11-eicosenoic acid, squalene, behenic acid, myristic acid, and linolenic acid;

[0015] Step S3: Grinding bitter orange and bergamot fruits, filtering and centrifuging to obtain volatile oil, and allowing to stand to obtain limonene, myrcene, linalool, α-pinene, sabinene, and β-pinene;

[0016] Step S4: Crush orange blossom, frankincense, lavender, silver fir, white orchid, helichrysum, rutin balsam, amyris, lemon mint, and peppermint, and mix them evenly to obtain plant solid fragments, and extract them by steam distillation to obtain 3-thujene, p-cymene, camphene, trans-caryophyllene, α-copaene, (+)-δ-cuberene, menthol, octanoic acid, menthone, and capric acid;

[0017] Step S5: uniformly mix the above components according to parts by weight to obtain a compound essential oil.

[0018] Furthermore, the refining method includes the following process: shelling and cleaning the sweet almonds, then crushing the sweet almond kernels into a paste, heating at a temperature of 60-80°C for extraction to obtain oil, removing the solvent by distillation, and then demucining, deacidifying and decolorizing, and finally performing high-temperature vacuum distillation, filtering the extracted product and collecting the filtrate to obtain oleic acid, linoleic acid, palmitic acid, stearic acid, and palmitoleic acid, the extraction solvent is hexane, and the vacuum distillation temperature is 240-280°C.

[0019] Furthermore, the cold pressing method in step S2 includes the following process: after physically pressing the argan nuts and cactus seeds, the oil is separated using a centrifugal separator, the extracted product is filtered and the filtrate is collected.

[0020] Furthermore, when the plant essential oil is extracted by cold pressing in step S2, the extraction should be carried out at 5-10°C.

[0021] Furthermore, the standing temperature in step S3 is 6°C.

[0022] Furthermore, when the plant essential oil is extracted by steam distillation in step S4, the mass ratio of water to plant solid fragments is 4:1-6:1.

[0023] In the present invention, oleic acid has the following effects: 1. Inhibition of melanin synthesis: Downregulation of protein kinase A (PKA), phosphatidylinositol 3-kinase (PI3K / Akt), and mitogen-activated protein kinase (MAPK) signaling pathways, inhibiting melanin formation. 2. Antioxidant effect: Protecting red blood cells from phenylhydrazine (PHZ)-induced cytotoxicity through antioxidant effects. 3. Promotion of keratinocyte differentiation: Upregulation of miR-203 expression in human epidermal keratinocytes (HEKn) promotes keratinocyte differentiation.

[0024] Linoleic acid has the following benefits: 1. Inhibits melanin synthesis: It downregulates protein kinase A (PKA), phosphatidylinositol 3-kinase (PI3K / Akt), and mitogen-activated protein kinase (MAPK) signaling pathways, inhibiting melanin formation. 2. It inhibits glutamate-induced reactive oxygen species (ROS) accumulation and reduces lipid peroxidation.

[0025] Stearic acid has significant antioxidant activity. Menthone has a strong inhibitory effect on tyrosinase, alleviating skin pigmentation. Caprylic acid exhibits excellent antioxidant activity against microorganisms and can serve as a natural antioxidant. Sabinene can scavenge 2,2-diphenyl-1-picrylhydrazide, reduce oxidative stress, and decrease the activity of antioxidant enzymes (glutathione S-transferase, catalase, and lipid peroxidase).

[0026] Linalool has the following effects: ① Anti-radiation: It can prevent single-strand breaks and purine oxidation on pUC19 plasmid DNA, has the ability to scavenge reactive oxygen species, and is a potential radiation protector.

[0027] Limonene has the following effects: ① Antioxidant: In the UC rat model, limonene reduced the expression levels of MMP-2 and MMP-9 mRNA by regulating the iNOS, COX-2, PGE2, TGF-β and ERK1 / 2 signaling pathways, indicating its potential antioxidant and anti-inflammatory properties.

[0028] The beneficial effects of the present invention are:

[0029] 1. The compound essential oil for improving dull skin color provided by the present invention has excellent effects on improving facial pigmentation, spots, acne marks, acne pits, dull skin, uneven skin color and dark yellow skin.

[0030] 2. The compound essential oil provided by the present invention is administered in the form of an external preparation, thereby avoiding adverse reactions that may be caused by oral medications, and is convenient and simple to use, and has good safety.

[0031] 3. The compound essential oil provided by the present invention can be used to improve dull skin tone. It contains a variety of plant extracts and their active ingredients, such as lavender extract and orange blossom extract, which are fat-soluble small molecules that can easily penetrate the skin barrier and reach the basal layer to exert their effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a TIC chromatogram of the compound essential oil prepared in Example 1 detected using the GC-MS detection method.

[0033] FIG2 is a TIC chromatogram of the compound essential oil prepared in Comparative Example 1 detected using the GC-MS detection method.

[0034] FIG3 is a TIC chromatogram of the compound essential oil prepared in Comparative Example 2 detected by GC-MS detection method.

[0035] FIG4 is a TIC chromatogram of the compound essential oil prepared in Comparative Example 3 detected using the GC-MS detection method.

[0036] FIG5 is a diagram showing facial skin symptoms of the test subjects before using the compound essential oil of the present invention.

[0037] Figure 6 shows the improvement of melanin pigmentation in the test population after using this product.

[0038] Figure 7 shows the improvement of the spots in the test group after using this product.

[0039] Figure 8 shows the improvement of acne scars and acne pits in the test subjects after using this product.

[0040] Figure 9 shows the improvement of dull skin in the test subjects after using this product.

[0041] Figure 10 shows the improvement in uneven skin tone in the test subjects after using this product.

[0042] Figure 11 shows the improvement in the dark yellow skin color of the test subjects after using this product. DETAILED DESCRIPTION

[0043] The present invention will be further explained below with reference to specific examples. The following examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples where specific conditions are not specified are generally performed under conventional conditions.

[0044] Sources:

[0045] The sweet almond, argan, cactus seed, bitter orange, bergamot, orange blossom, frankincense, lavender, silver fir, white orchid, helichrysum, balsam, amyris, lemon mint, and peppermint used in the following examples all meet the relevant provisions under the various medicinal materials in the main text of the Chinese Pharmacopoeia (2015 edition) Volume 1. Before feeding, each medicinal material was identified as being consistent with its name and of quality standard by identification. Extraction was performed using the kernels of sweet almond and argan, the seeds of cactus, the peels of bitter orange and bergamot, the flowers of orange, lavender, white orchid, and helichrysum, the resins of frankincense and amyris, the branches and leaves of silver fir, the wood of amyris, and the whole plant parts of lemon mint and peppermint.

[0046] Example 1

[0047] (1) Take 100g of shelled sweet almond kernels, clean the surface, and grind the kernels into a paste. After heating at 65°C, add hexane to dissolve the oil and obtain the oil fraction. Remove part of the solvent by high-temperature distillation at 250°C, and then perform demucining, deacidification, and decolorization.

[0048] (2) 100 g each of argan and cactus seeds were cleaned and then mechanically squeezed. The temperature was maintained at 7°C and oxygen and light were isolated. The oil was then separated using a centrifugal separator, and the extracted product was filtered to collect the second filtrate.

[0049] (3) Take 100g of bitter orange or bergamot fruit, including the peel, wash it, place it on a grinding wheel, and rotate it at high speed so that the thorns of the grinding wheel pierce the peel, releasing the volatile oil. At the same time, spray water to wash the volatile oil down and let it flow into a receiving tank. The mixture of juice and volatile oil is filtered through a sieve and sent to a centrifuge to separate the volatile oil. Let it stand in an ice storage at 6°C for 6 days to allow impurities to sink, and then use a siphon to suck out the pure volatile oil on the top.

[0050] (4) Take 100g each of orange blossom, frankincense, lavender, silver fir, white orchid, helichrysum, rutin balsam, amyris, lemon mint, and peppermint, wash and crush them for later use. Then, add them to a distillation apparatus and add 450mL of water for steam distillation. Extract the volatile oils at 30°C. After 300 minutes, remove the heat and collect the distillate.

[0051] (5) The products obtained in the above four steps are mixed uniformly to obtain the compound essential oil of Example 1, and placed in the same brown bottle for use.

[0052] The compound essential oil of this embodiment comprises: 57 parts of oleic acid, 25 parts of linoleic acid, 11 parts of palmitic acid, 5 parts of stearic acid, 0.4 parts of limonene, 0.3 parts of α-pinene, 0.3 parts of linalool, 0.2 parts of palmitoleic acid, 0.2 parts of eicosanoic acid, 0.2 parts of squalene, 0.2 parts of α-copaene, 0.2 parts of cis-11-eicosenoic acid, 0.1 parts of β-pinene, 0.09 parts of trans-caryophyllene, and 0.05 parts of 3-thujacene. , 0.04 part of camphene, 0.04 part of behenic acid, 0.04 part of myristic acid, 0.04 part of p-cymene, 0.03 part of (+)-δ-cuberene, 0.03 part of menthol, 0.03 part of linolenic acid, 0.02 part of caprylic acid, 0.02 part of menthone, 0.02 part of capric acid, 0.01 part of sabinene, and 0.01 part of myrcene. Mix the above raw materials evenly to obtain a compound essential oil, and place it in a brown bottle for use.

[0053] Comparative Example 1

[0054] (1) Take 100g of shelled sweet almond kernels, clean the surface, and grind the kernels into a paste. After heating at 60°C, add hexane to dissolve the oil and obtain the oil fraction. Remove part of the solvent by high-temperature distillation at 250°C, and then perform demucining, deacidification, and decolorization.

[0055] (2) 100 g each of argan and cactus seeds were cleaned and then physically squeezed using a machine. The temperature was maintained at 8°C during the squeezing process, and oxygen and light were isolated. The oil was then separated using a centrifuge, and the extracted product was filtered to collect a second filtrate.

[0056] (3) Take 100g of bitter orange or bergamot fruit, including the peel, wash it, place it on a grinding wheel, and rotate it at high speed so that the thorns of the grinding wheel pierce the peel, releasing the volatile oil. At the same time, spray water to wash the volatile oil down and let it flow into a receiving tank. The mixture of juice and volatile oil is filtered through a sieve and sent to a centrifuge to separate the volatile oil. Let it stand in an ice storage at 6°C for 6 days to allow impurities to sink, and then use a siphon to suck out the pure volatile oil on the top.

[0057] (4) Take 100 g each of orange blossom, frankincense, lavender, silver fir, white orchid, helichrysum, rutin balsam, amyris, lemon mint, and peppermint, wash and crush them for later use. Then, add them to a distillation apparatus and add 450 mL of water for steam distillation. Extract the volatile oils at 30°C. After 250 min, remove the heat and collect the distillate.

[0058] (5) The products obtained in the above four steps are mixed uniformly to obtain the compound essential oil of Example 2, and placed in the same brown bottle for use.

[0059] The compound essential oil of the present embodiment comprises: 54 parts of oleic acid, 24 parts of linoleic acid, 11 parts of palmitic acid, 4 parts of stearic acid, 0.6 part of limonene, 0.3 part of α-pinene, 0.3 part of linalool, 0.2 part of palmitoleic acid, 0.2 part of eicosanoic acid, 0.2 part of α-copaene, 0.1 part of cis-11-eicosenoic acid, 0.1 part of β-pinene, 0.1 part of trans-caryophyllene, 0.06 part of 3-thujacene, 0.05 part of camphene, 0.04 part of myristic acid, 0.03 part of p-cymene, 0.03 part of menthol, 2 parts of caprylic acid, 2 parts of capric acid, 0.01 part of sabinene, and 0.02 part of myrcene. The above raw materials are mixed evenly to obtain the compound essential oil, which is placed in a brown bottle for use.

[0060] Comparative Example 2

[0061] (1) Take 100g of shelled sweet almond kernels, clean the surface, and grind the kernels into a paste. After heating at 65°C, add hexane to dissolve the oil and obtain the oil fraction. Remove part of the solvent by high-temperature distillation at 280°C, and then perform demucining, deacidification, and decolorization.

[0062] (2) 100 g each of argan and cactus seeds were cleaned and then physically squeezed using a machine. The temperature was maintained at 7.5°C during the squeezing process, and oxygen and light were isolated. The oil was then separated using a centrifugal separator, and the extracted product was filtered to collect the second filtrate.

[0063] (3) Take 100g of bitter orange or bergamot fruit, including the peel, wash it, place it on a grinding wheel, and rotate it at high speed so that the thorns of the grinding wheel pierce the peel, releasing the volatile oil. At the same time, spray water to wash the volatile oil down and let it flow into a receiving tank. The mixture of juice and volatile oil is filtered through a sieve and sent to a centrifuge to separate the volatile oil. Let it stand in an ice storage at 6°C for 6 days to allow impurities to sink, and then use a siphon to suck out the pure volatile oil on the top.

[0064] (4) Take 100g each of orange blossom, frankincense, lavender, silver fir, white orchid, helichrysum, rutin balsam, amyris, lemon mint, and peppermint, wash and crush them for later use. Then, add them to a distillation apparatus and add 500mL of water for steam distillation. Extract the volatile oils at 30°C. After 300 minutes, remove the heat and collect the distillate.

[0065] (5) The products obtained in the above four steps are mixed evenly to obtain the compound essential oil of Example 3, and placed in the same brown bottle for use.

[0066] The compound essential oil of the present embodiment comprises: 57 parts of oleic acid, 27 parts of linoleic acid, 11 parts of palmitic acid, 4 parts of stearic acid, 0.3 part of limonene, 0.1 part of α-pinene, 0.2 part of linalool, 0.2 part of palmitoleic acid, 0.1 part of eicosapentaenoic acid, 0 part of squalene, 0.1 part of α-copaene, 0.1 part of cis-11-eicosenoic acid, 0.07 part of β-pinene, 0.08 part of trans-caryophyllene, 0.04 part of camphene, 0.04 part of myristic acid, and 0.03 part of menthol. The above raw material components are mixed evenly to obtain the compound essential oil, which is placed in a brown bottle for use.

[0067] Comparative Example 3

[0068] (1) Take 100g of shelled sweet almond kernels, clean the surface, and grind the kernels into a paste. After heating at 60°C, add hexane to dissolve the oil and obtain the oil fraction. Remove part of the solvent by high-temperature distillation at 250°C, and then perform demucining, deacidification, and decolorization.

[0069] (2) 100 g each of argan and cactus seeds were cleaned and then physically squeezed using a machine. The temperature was maintained at 8°C during the squeezing process, and oxygen and light were isolated. The oil was then separated using a centrifuge, and the extracted product was filtered to collect a second filtrate.

[0070] (3) Take 100g of bitter orange or bergamot fruit, including the peel, wash it, place it on a grinding wheel, and rotate it at high speed so that the thorns of the grinding wheel pierce the peel, releasing the volatile oil. At the same time, spray water to wash the volatile oil down and let it flow into a receiving tank. The mixture of juice and volatile oil is filtered through a sieve and sent to a centrifuge to separate the volatile oil. Let it stand in an ice storage at 6°C for 6 days to allow impurities to sink, and then use a siphon to suck out the pure volatile oil on the top.

[0071] (4) Take 100 g each of orange blossom, frankincense, lavender, silver fir, white orchid, helichrysum, rutin balsam, amyris, lemon mint, and peppermint, wash and crush them for later use. Then, add them to a distillation apparatus and add 550 mL of water for steam distillation. Extract the volatile oils at 30°C. After 350 min, remove the heat and collect the distillate.

[0072] (5) The products obtained in the above four steps are mixed uniformly to obtain the compound essential oil of Example 4, and placed in the same brown bottle for use.

[0073] The compound essential oil of the present embodiment comprises: 57 parts of oleic acid, 27 parts of linoleic acid, 11 parts of palmitic acid, 4 parts of stearic acid, 0.3 part of limonene, 0.2 part of α-pinene, 0.2 part of linalool, 0.2 part of palmitoleic acid, 0.1 part of eicosapentaenoic acid, 0 part of squalene, 0.1 part of α-copaene, 0.2 part of cis-11-eicosenoic acid, 0.08 part of β-pinene, 0.08 part of trans-caryophyllene, 0.04 part of camphene, 0.04 part of myristic acid, 0.03 part of p-cymene, 0.03 part of menthol, 0.01 part of sabinene, and 0.02 part of myrcene. The above raw materials are mixed evenly to obtain the compound essential oil, which is placed in a brown bottle for use.

[0074] Test Case

[0075] 1. GC-MS test results

[0076] The compound essential oils obtained in Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3, and Comparative Example 4 were subjected to gas chromatography. The results are shown in the TIC spectra obtained in Table 1, Figures 1, 2, 3, and 4.

[0077] Table 1 Main components of compound essential oils

[0078] 2. Compound essential oil effect testing

[0079] Taking the above four embodiments into comprehensive consideration, the best embodiment is selected for population testing.

[0080] (1) Product name: Compound essential oil for improving dull skin tone, the composition is shown in Table 1 Example 1.

[0081] (2) Product Usage: Take 0.1g of compound essential oil on the palm of your hand and massage along the skin texture until absorbed.

[0082] (3) Frequency of use: Twice a day.

[0083] (4) Testing date: March 2023.

[0084] (5)Use period: 14 days.

[0085] (6) Age range of the subjects: 19-60 years old.

[0086] (7) Subjects: People with facial skin pigmentation, spots, acne scars, dull skin, uneven skin tone, dark yellow skin tone, etc. Finally, 36 valid reports were obtained.

[0087] The facial skin symptoms of the test group before using the compound essential oil provided by the present invention are shown in Table 2 and Figure 2.

[0088] Table 2 Facial skin symptoms before using the compound essential oil provided by the present invention

[0089] As can be seen from the above results, a large number of subjects experienced symptoms of dull skin and acne scars. After using the compound essential oil for improving dull skin tone provided by the present invention, these skin symptoms were effectively improved. At the same time, no significant side effects were observed in the subjects.

[0090] The above description is merely an example of the implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A compound essential oil for improving dull skin tone, characterized in that: The invention comprises the following components in parts by weight: 50-59 parts of oleic acid, 23-29 parts of linoleic acid, 9-13 parts of palmitic acid, 3-7 parts of stearic acid, 0.2-0.8 parts of limonene, 0.05-0.5 parts of α-pinene, 0.1-0.5 parts of linalool, 0.01-0.4 parts of palmitoleic acid, 0.01-0.4 parts of eicosanoic acid, 0.01-0.4 parts of squalene, 0.01-0.4 parts of α-copaene, 0.01-0.4 parts of cis-11-eicosenoic acid, 0.01-0.4 parts of β-pinene, 0.01-0.3 parts of trans-caryophyllene, 0.0 1-0.3 parts, 3-thujacene 0.01-0.3 parts, camphene 0.01-0.2 parts, behenic acid 0.01-0.2 parts, myristic acid 0.01-0.2 parts, p-cymene 0.01-0.2 parts, (+)-δ-cuberene 0.01-0.1 parts, menthol 0.01-0.1 parts, linolenic acid 0.01-0.1 parts, caprylic acid 0.01-0.1 parts, menthone 0.01-0.1 parts, capric acid 0.01-0.1 parts, sabinene 0.01-0.1 parts, myrcene 0.01-0.1 parts.

2. The compound essential oil for improving dull skin color according to claim 1, wherein The invention comprises the following components in parts by weight: 53-58 parts of oleic acid, 24-27 parts of linoleic acid, 10-12 parts of palmitic acid, 4-6 parts of stearic acid, 0.3-0.6 parts of limonene, 0.1-0.4 parts of α-pinene, 0.2-0.4 parts of linalool, 0.1-0.3 parts of palmitoleic acid, 0.1-0.3 parts of eicosanoic acid, 0.1-0.3 parts of squalene, 0.1-0.3 parts of α-copaene, 0.1-0.3 parts of cis-11-eicosenoic acid, 0.05-0.15 parts of β-pinene, 0.05-0.15 parts of trans-caryophyllene, 3 - 0.05-0.1 part of thujacene, 0.01-0.06 part of camphene, 0.01-0.05 part of behenic acid, 0.01-0.05 part of myristic acid, 0.01-0.05 part of p-cymene, 0.01-0.05 part of (+)-δ-cuberene, 0.01-0.05 part of menthol, 0.01-0.05 part of linolenic acid, 0.01-0.05 part of caprylic acid, 0.01-0.05 part of menthone, 0.01-0.03 part of capric acid, 0.01-0.03 part of sabinene, and 0.01-0.03 part of myrcene.

3. The compound essential oil for improving dull skin color according to claim 3, wherein The invention comprises the following components in parts by weight: oleic acid 57 parts, linoleic acid 25 parts, palmitic acid 11 parts, stearic acid 5 parts, limonene 0.4 parts, α-pinene 0.3 parts, linalool 0.3 parts, palmitoleic acid 0.2 parts, eicosanoic acid 0.2 parts, squalene 0.2 parts, α-copaene 0.2 parts, cis-11-eicosenoic acid 0.2 parts, β-pinene 0.1 parts, trans-caryophyllene 0. 09 parts, 0.05 parts of 3-thujacene, 0.04 parts of camphene, 0.04 parts of behenic acid, 0.04 parts of myristic acid, 0.04 parts of p-cymene, 0.03 parts of (+)-δ-cuberene, 0.03 parts of menthol, 0.03 parts of linolenic acid, 0.02 parts of caprylic acid, 0.03 parts of menthone, 0.02 parts of capric acid, 0.01 parts of sabinene, and 0.01 parts of myrcene.

4. A method for preparing a compound essential oil for improving dull skin tone, characterized in that: The steps include: Step S1: extracting sweet almonds by a refining method to obtain oleic acid, linoleic acid, palmitic acid, stearic acid, palmitoleic acid, behenic acid, cis-11-eicosenoic acid, and linolenic acid; Step S2: extracting argan and cactus seeds by cold pressing to obtain oleic acid, linoleic acid, palmitic acid, stearic acid, palmitoleic acid, eicosanoic acid, cis-11-eicosenoic acid, squalene, behenic acid, myristic acid, and linolenic acid; Step S3: Grinding bitter orange and bergamot fruits, filtering and centrifuging to obtain volatile oil, and allowing to stand to obtain limonene, myrcene, linalool, α-pinene, sabinene, and β-pinene; Step S4: Crush orange blossom, frankincense, lavender, silver fir, white orchid, helichrysum, rutin balsam, amyris, lemon mint, and peppermint, and mix them evenly to obtain plant solid fragments, and extract them by steam distillation to obtain 3-thujene, p-cymene, camphene, trans-caryophyllene, α-copaene, (+)-δ-cuberene, menthol, octanoic acid, menthone, and capric acid; Step S5: uniformly mix the above components according to parts by weight to obtain a compound essential oil.

5. The method for preparing the compound essential oil for improving dull skin color according to claim 4, wherein In step S1, the refining method includes the following process: shelling and cleaning the sweet almonds, crushing the sweet almond kernels into a paste, heating at a temperature of 60-80°C for extraction to obtain oil, removing the solvent by distillation, and then demucining, deacidifying and decolorizing. Finally, high-temperature vacuum distillation is performed, and the extracted product is filtered and the filtrate is collected to obtain oleic acid, linoleic acid, palmitic acid, stearic acid, and palmitoleic acid. The extraction solvent is hexane, and the vacuum distillation temperature is 240-280°C.

6. The method for preparing the compound essential oil for improving dull skin color according to claim 4, wherein The cold pressing method in step S2 includes the following process: after physically pressing the argan nuts and cactus seeds, the oil is separated using a centrifugal separator, the extracted product is filtered and the filtrate is collected.

7. The method for preparing the compound essential oil for improving dull skin color according to claim 4, wherein When the plant essential oil is extracted by cold pressing in step S2, the extraction should be carried out at 5-10°C.

8. The method for preparing the compound essential oil for improving dull skin color according to claim 4, wherein The temperature of the standing temperature in step S3 is 6°C.

9. The method for preparing the compound essential oil for improving dull skin color according to claim 4, wherein When the plant essential oil is extracted by steam distillation in step S4, the mass ratio of water to plant solid fragments is 4:1-6:1.

Images