Whey protein may improve blood pressure and lipids
In this study, 38 healthy, non-smoking men and women with mildly elevated blood pressure, age 30 to 77, were not taking antihypertensive or cholesterol medications. Participants took a whey protein shake or a calcium caseinate shake, each containing 28 grams of protein, twice per day, or a placebo. After eight weeks, compared to placebo, those in the whey protein group saw a decline of 3.9 mmHg in systolic blood pressure, and 2.5 mmHg in diastolic blood pressure. The caseinate protein group saw an insignificant increase of 0.6 and 0.3 mmHg in systolic and diastolic blood pressure while the placebo had a 1 and 0.5 mmHg increase.
Also for whey protein, systolic blood pressure at the extremities and centrally had declined by 5.7 and 5.4 mmHg, respectively.

Blood vessel flexibility increased for both whey and calcium caseinate compared to placebo. Total cholesterol levels in the whey group declined to 188.7 from 195.2 mg/dL. The caseinate group declined to 189.1 from 193.7 mg/dL, while increasing for placebo. Triglycerides dropped to 102.7 from 116.0 mg/dL for the whey group, and in the caseinate group dropped to 102.7 from 115.4 mg/dL, while the placebo group increased.

Reference: American Journal of Clinical Nutrition; October, 2016, Published Online.
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