ProMix Nutrition Unflavored Casein Protein Powder Review

This product is mostly casein protein, and no studies on casein and blood pressure were provided, so the evidence below covers only small nutrients on the label, with no amounts stated. Calcium has modest support. In people with normal blood pressure, it lowered blood pressure by about 1 to 1.5 points ^[1][2]. In pregnant women, it lowered the risk of pregnancy high blood pressure ^[3][4], although one large trial found no benefit ^[5]. Potassium, mainly as potassium-enriched salt, lowered blood pressure by a few points, most in people with high blood pressure ^[6][7]. The benefit weakened at higher doses ^[8]. Vitamin D did not lower blood pressure in large trials of older adults and people with prediabetes ^[9][10][11], and results in pregnancy were mixed ^[4][12]. Iron did not change blood pressure ^[13][14]. The amounts of these nutrients in a protein powder are not given and are unlikely to match the studied doses. Animal and cell studies are never counted.

Vitamin D is the main ingredient, and nearly the whole panel speaks well of it: most of them recommend it or take it themselves, and the rest are neutral. They take it for general health, brain and muscle function, bone health, and to fix low blood levels. Several favor the D3 form, three take 5000 IU in the morning, and one has taken D3 with K2 for over a decade. Two of them say to take it with dietary fat for better absorption, one suggests the morning, and one says it is not worth taking unless you are low. Blood level targets vary, from 40 to 50 up to 60 to 100 nanograms per milliliter, and nobody on the panel said they stopped taking it.

Its studied ingredients are not at the doses that worked in studies, and reviews are not strong enough on their own. The final check notes: The grade rests on vitamin D, iron, calcium and potassium, which are trace nutrients from the nutrition facts panel, while the main ingredient, casein protein, has no blood pressure studies given.