This application discloses a functional composition, a conditioning agent, and its application in the preparation of a supplement for improving sub-health conditions. The functional composition comprises a first
active ingredient and a second
active ingredient. The first
active ingredient includes red raspberry and carrot, and the second active ingredient includes one or more of
artichoke extract and
Fusarium oxysporin. The
mass ratio of the first active ingredient to the second active ingredient is (1-10000):(1-10000). This application, through the formulation of active ingredients, promotes the body's absorption of iron through mechanisms such as intestinal
iron absorption and / or regulation of
hepcidin, thereby supplementing iron and significantly improving iron deficiency. Therefore, the functional composition provided by this application can be used to improve symptoms such as
anemia caused by functional iron deficiency. Simultaneously, the functional composition also has beneficial effects such as regulating constitution, replenishing qi and blood, and improving sub-health conditions.