Citrus Bioflavonoids

What it is

Citrus Bioflavonoids are naturally occurring polyphenolic compounds extracted from the peel and pulp of citrus fruits such as oranges, lemons, and grapefruits. In dietary supplements, the complex is standardized to flavanone glycosides—principally hesperidin, naringin, and rutin. When paired with Velobiotics microencapsulated probiotic cultures, citrus bioflavonoids work synergistically within the intestinal lumen to combat oxidative stress and maintain healthy vascular permeability.

Also known as: Bioflavonoids, Citrus Bioflavonoid Complex

Key benefits

• Protects capillary walls and supports microvascular circulation and elasticity.
• Enhances cellular uptake and antioxidant activity of vitamin C.
• Neutralizes reactive oxygen species and reduces cellular oxidative damage.
• Supports healthy endothelial inflammatory response and blood vessel integrity.

Amplified by probiotics

Citrus flavanone glycosides like hesperidin and naringin possess bulky disaccharide residues (rutinose or neohesperidoside) that hinder upper gastrointestinal absorption. Live probiotic strains (including Bifidobacterium and Lactobacillus species) secrete specific alpha-L-rhamnosidases and beta-D-glucosidases that cleave these sugar moieties in the colon, yielding lipophilic aglycones hesperetin and naringenin. Gut bacteria further break down these aglycones into bioavailable phenolic acids (such as hydroxyphenylpropionic acid) that enter systemic circulation. Live probiotics also reduce mucosal inflammation and preserve tight junctions, enhancing enterocyte uptake of active bioflavonoid metabolites and bolstering vascular endothelial nitric oxide synthesis.

Typical dose

100–500 mg/day

The evidence

Human clinical trials establish that citrus bioflavonoid supplementation improves vascular endothelial function, increases microvascular perfusion, and lowers systemic biomarkers of inflammatory stress in subjects with metabolic risk factors. Clinical crossover studies confirm enhanced arterial reactivity and antioxidant status following oral bioflavonoid intake. (Rizza 2011, J Clin Endocrinol Metab) (Valls 2015, Eur J Nutr)

1. Rizza S, et al. Citrus polyphenol hesperidin stimulates production of nitric oxide in endothelial cells while improving endothelial function and reducing inflammatory markers in patients with metabolic syndrome. J Clin Endocrinol Metab. 2011;96(5):E782-792. PubMed ↗
2. Valls RM, et al. Effects of hesperidin consumption on vascular function in subjects with metabolic syndrome: a randomized double-blind crossover trial. Eur J Nutr. 2015;54(7):1217-1227. PubMed ↗

Safety & who should check first

Extremely safe with an established dietary history; mild gastrointestinal discomfort is rare. No known severe adverse effects; caution with medications metabolized by cytochrome P450 enzymes (e.g., CYP3A4).