# Vitamins (D3, B-group, ascorbic acid)

Upstream — fermentation & cell culture — Industrial vitamin production — B-vitamins via direct fermentation, vitamin C via two-step glucose bioconversion, and vitamin D3 via UV photochemistry — concentrated predominantly in China for bulk ascorbic acid, while the EU retains unique fermentation capacity for riboflavin and…

Source: https://en.bioecon.ru/market/upstream/vitamins-d3-b-group-ascorbic-acid/