Angiotensin I-converting enzyme inhibitory substance

摘要

The subject of the invention is to produce a peptide with potent the angiotensin I-converting enzyme (ACE) inhibitory activity by decomposing the protein contained in wakame with protease, using wakame being a food material ingested daily as a raw material, and to provide a safe food composition with hypotensive activity, using the treatment product thereof as a raw material. The inventors have found that, when performing the decomposing treatment of wakame with various proteases, a group of endo-type enzymes produced by Bacillus produce peptides with particularly strong ACE inhibitory activity, leading to the completion of the invention.