Furthermore, the peptides Phe-Tyr, Thr-Pro, Leu-Gln, L-Arg-L-Ala, Gly-Leu-Pro, Ala-Glu-Leu, and Glu-Ala-Pro, abundant in natto and in tempeh, possess angiotensin-converting enzyme inhibition (ACE) properties and may help in reducing hypertension [69,70]. This evidence concerns the gene ACE and Hypertension.