Tremella Polysaccharide manufacturer / supplier in China, offering High Purity Bird′s Nest Acid (sialic acid) 99% Directly Supplied by Pharmaceutical Grade Raw Material Factory, Swallow′s Nest Acid (sialic acid) Safe and Pollution-Free Production by Biological Fermentation Method, Pharmaceutical Grade Bird′s Nest Acid High Activity Sialic Acid Stable Supply Support Customization and so on.