You have to read the ingredients and learn to know the difference between natural ingredients vs. chemical additives like "autolyzed yeast extract" or "hydrolyzed vegetable protein."
Whey wine was fermented by yeast with whey poly-peptides hydrolyzed from whey powder by proteinase.
采用蛋白酶水解乳清粉，对乳清多肽进行酵母菌发酵，并对发酵所得乳清酒进行风味调配。
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The protein hydrolyzed can be used as nitrogen during the period of fermentation to prove the growth of yeast, in addition, increase the alcohol production rate.