Assertion: milk's acid | /r/AtLocation | kefir
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Source sentences:
text: Also similar to milk, kefir contains vitamins in variable amounts, including vitamin A, vitamin B 1 (thiamine), vitamin B 2 (riboflavin), vitamin B 3 (niacin), vitamin B 6 (pyridoxine), vitamin B 9 (folic acid), vitamin B 12 (cyanocobalamin), vitamin C, vitamin D, and vitamin E. Essential amino acids found in kefir include methionine, cysteine, tryptophan, phenylalanine, tyrosine, leucine, isoleucine, threonine, lysine, and valine, as for any milk product.