Evidence supporting the use of: Garlic bulb
For the health condition: Circulation (to the brain)

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Synopsis

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

Garlic (Allium sativum) has a long history of use in traditional medicine, including for cardiovascular health, but there is also scientific evidence suggesting its potential to support circulation, including cerebral (brain) blood flow. The active compounds in garlic, notably allicin and other sulfur-containing constituents, have been shown to possess vasodilatory, antiplatelet, and blood pressure-lowering effects. These mechanisms can theoretically enhance overall blood circulation, including to the brain. Clinical studies and animal models have demonstrated that garlic supplementation can improve endothelial function, reduce blood viscosity, and inhibit platelet aggregation, all of which contribute to better blood flow. Several randomized controlled trials have reported modest reductions in blood pressure among hypertensive individuals taking garlic extracts, and improved peripheral circulation has been observed in patients with peripheral arterial disease. Specific to cerebral circulation, some animal studies suggest garlic may increase cerebral blood flow and protect against ischemic injury via antioxidant and anti-inflammatory actions. However, direct high-quality clinical trials in humans focusing on brain circulation are limited; most evidence is extrapolated from broader cardiovascular research. In summary, while garlic has traditional use for circulation and there is moderate scientific support for its effects on vascular health, direct evidence for enhanced brain circulation is suggestive but not definitive. Therefore, the evidence rating is 3 out of 5, reflecting promising but not conclusive scientific validation.

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