Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Bioflavonoids, also known as flavonoids or vitamin P, have a long history of traditional use for supporting capillary strength and reducing external bleeding or bruising. Their use can be traced back to the 1930s, when Albert Szent-Györgyi discovered their presence in citrus fruits and suggested they aided vitamin C in maintaining capillary integrity. Since then, bioflavonoids have been incorporated into various traditional remedies for issues like bleeding gums, easy bruising, and capillary fragility, particularly in Europe and Asia. The rationale for their use is based on observations that they seem to decrease capillary permeability and fragility, theoretically making blood vessels less likely to rupture and bleed externally. Scientific evidence supporting these claims remains limited and somewhat inconsistent. Some small studies and animal experiments suggest that certain bioflavonoids (such as rutin or hesperidin) may help reduce bruising and minor bleeding by strengthening the walls of blood vessels. However, robust, large-scale clinical trials in humans are lacking, and most studies focus on internal capillary issues rather than external bleeding per se. As a result, bioflavonoids are primarily justified by tradition rather than strong scientific validation for external bleeding, and their widespread use in this context is largely based on historical precedent rather than rigorous modern evidence.

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