Grape seed extract lowered diastolic blood pressure about 2 mmHg across 19 trials, but the bottle's 16,000 mg is seed weight, not dose. Here is the evidence.
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Magnesium Inadequacy Is Common: What the NIH Data Actually Show
NIH survey data show 48% of Americans get less magnesium than they need. Here's what the research actually supports for blood pressure, migraine, and bone health.