All foods
experience increased nutrition with fermentation. There are slight differences because each type of fermentation may use a different organism or organisms and the foods themselves are different.
I can confirm a huge increase in Vitamin C in sauerkraut!
Others...
incredible reduction in lactose when fermenting
dairy
production of vitamin K2 when fermenting soy as in natto
--Wardeh ('Wardee') Harmon
GNOWFGLINS -- Enjoying "God's Natural, Organic, Whole Foods, Grown Locally, In Season"
Author of "The Complete Idiot's Guide to Fermenting Foods"