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Foods particularly rich in L-Leucine are beef (approx. 1690 mg / 100 g), raw salmon (approx. 1615 mg / 100 g), eggs (approx. 1090 mg / 100 g) and wheat products (approx. 920 mg / 100 g). L-Valine und L-Isoleucine are also included in significant amounts in meat and other animal produce. Dried peas (approx. 1160 mg / 100 g) and walnuts (approx. 750 mg / 100 g) are particularly suited for vegetarians with their high BCAA concentration. read the review.
Where to Find It. Dietary sources of betaine include fish, beets, and legumes. Betaine is most widely available as betaine hydrochloride (betaine-HCl), but that form is used primarily as a source of hydrochloric acid for people with hypochlorhydria (low stomach acid). The forms used specifically to provide betaine are betaine citrate and betaine aspartate.