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A study of 10 individuals with hypertension found that a section of a protein derived from milk lowers blood pressure. Once the participants took casein peptide, called C12, they experienced an average drop of 9 points in systolic pressure and 6 points in diastolic pressure.
The study involved the participants taking C12 either alone or combined with a seaweed extract called alginic acid. Research has suggested that seaweed extract may help the body excrete sodium in the urine.
During the study, the participants took an inactive placebo pill for 5 days and then 1 of 5 treatments: a placebo treatment, or high or low doses of C12 either alone or combined with alginic acid. In order to try each treatment, all the participants repeated this 5 times. The results of the study showed that the participants who took the high dose of C12 along with alginic acid had a dramatic drop in systolic and diastolic pressure, compared with the placebo treatment. (The findings were reported recently in the American Journal of Hypertension.)