Synopsis

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

Vitamin C has a scientifically supported role in maintaining capillary integrity and treating capillary weakness. Vitamin C (ascorbic acid) is essential for the biosynthesis of collagen, a primary structural protein found in blood vessel walls, including capillaries. Deficiency in vitamin C leads to impaired collagen synthesis, resulting in weakened blood vessel walls and increased capillary fragility—a hallmark of scurvy, which is characterized by easy bruising, bleeding gums, and petechiae due to capillary rupture. Clinical studies and case reports have shown that supplementation with vitamin C can improve symptoms associated with capillary fragility, particularly in individuals with marginal or overt deficiency.

Experimental studies have demonstrated that vitamin C strengthens capillary walls by promoting collagen cross-linking and reducing oxidative stress, which can otherwise damage the endothelium. While most evidence comes from deficiency states, some studies suggest that vitamin C supplementation may also benefit individuals with idiopathic or acquired capillary fragility, though data for therapeutic use in non-deficient populations are less robust. Overall, the link between vitamin C and capillary health is well established in the medical literature, particularly in the context of deficiency, justifying its use for supporting and treating capillary weakness.

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