Quick answer: Meta-analyses found modest blood pressure reductions with L-arginine at 4 to 24 g a day and L-citrulline at 3 to 6 g a day. BloodPril's blend is 500 mg per capsule.
L-arginine
Trials found small average reductions in systolic and diastolic pressure at gram doses. Much oral arginine is broken down before reaching the blood.
L-citrulline
Converted to arginine by the kidneys and raises blood arginine more reliably. Studies used 3 to 6 g a day.
How BloodPril compares
500 to 1,000 mg a day total. Expect gentle support at most. PubMed: citrulline and BP.
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General information, not medical advice. BloodPril is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease.