This invention relates to a composition and its use for formulating 
nucleic acid-based drugs / vaccines with 
sugar alcohol compositions into complexes for both in-vitro and in-vivo delivery. Particularly, the present invention includes the ingredients and processes necessary for formulating therapeutic and pharmaceutical 
nucleic acid compositions, such as miRNA, 
microRNA precursors, shRNAs, siRNAs, ribozymes, antisense RNAs / DNAs, 
RNA-
DNA hybrids and 
DNA vectors / vaccines, with glycylated 
sugar alcohols / sugars into delivery complexes, which can then be absorbed by cells 
in vivo and 
in vitro via active 
endocytosis. Also, the present invention discloses that chemical compounds containing 
sugar alcohol- and / or sugar-like structures can protect nucleic acids, in particular miRNAs, shRNAs, siRNAs and ribozymes, from degradation 
in vivo as well as 
in vitro. Therefore, the present invention is also a formula and method for preserving the 
structural integrity and functional 
efficacy of these 
nucleic acid-based drugs and / or vaccines 
in vivo and 
in vitro.