Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Spirulina, a blue-green algae, has gained attention for its potential in supporting cardiovascular health, including the management of hypertension (high blood pressure). Several clinical and preclinical studies suggest that spirulina supplementation may have a modest blood pressure-lowering effect, particularly in individuals with elevated blood pressure or metabolic syndrome. The proposed mechanisms include spirulina’s antioxidant effects, improvement of endothelial function, and modulation of nitric oxide production, which can contribute to vasodilation and lower vascular resistance.

A few randomized controlled trials (RCTs) have reported reductions in systolic and diastolic blood pressure in subjects taking spirulina, typically at doses ranging from 1 to 4 grams per day over periods of 2 to 12 weeks. For example, a 2016 RCT in hypertensive patients found that 2g spirulina daily led to a significant decrease in blood pressure compared to placebo. Animal studies corroborate these findings and suggest that spirulina may reduce oxidative stress and inflammation, both of which are implicated in hypertension.

However, the quantity and scale of clinical evidence remain limited, and results are somewhat inconsistent across studies. While spirulina shows promise as a complementary approach, it should not replace standard antihypertensive therapies. Larger, long-term studies are needed to further clarify its efficacy and safety. In summary, there is moderate scientific evidence supporting spirulina’s use as an adjunct for hypertension, but it cannot be considered a primary or standalone treatment.

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Other ingredients used for Hypertension

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