Synopsis

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

Bioflavonoids, often derived from citrus fruits, have a long history of traditional use in supporting capillary strength and reducing bruising. The rationale is that bioflavonoids, particularly when combined with vitamin C, may help strengthen blood vessel walls and reduce their permeability, which could reduce the tendency to bruise easily. This traditional use is reflected in older European and naturopathic texts that recommend bioflavonoids for capillary fragility and easy bruising, sometimes under the name "vitamin P." However, rigorous scientific evidence to support the use of mixed bioflavonoids specifically for the prevention of bruises is limited. Some small clinical studies and early research suggest that certain bioflavonoids (such as rutin and hesperidin) may have a modest effect on capillary health, but these studies are few, often methodologically weak, and sometimes confounded by concurrent use of vitamin C. Modern systematic reviews generally conclude that while bioflavonoids are safe and may have a plausible mechanism of action, there is insufficient high-quality evidence to recommend them for the prevention of bruising. In summary, the use of bioflavonoids for this purpose is primarily supported by tradition, with limited and low-quality evidence from scientific studies.

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