Bioflavonoid substances are widely distributed in nature. Onion has a rich content of Quercetin.
Flavonoids are phenolic compounds naturally occurring that are abundantly present in plants and seaweed.
We take it from fruits, vegetables, tea and red wine (as a few examples)
Most important types are: anthocyanins, chalcons, flavonols, flavones, flavonoids and tannins. No risk for toxic nor side-effects in humans have been found.
They appear naturally in the breast milk in amounts related to mother's diet.
Attributed anti-oxidant activity and other properties that have not been fully shown yet, as amelioration of capillary vessel function which is a reason to be used for treatment of venous insufficiency (varicose veins), hemorrhoids and prevention of arteriosclerosis.
We do not have alternatives for Quercetin since it is relatively safe.
Very Low Risk
Compatible. Not risky for breastfeeding or infant.
Moderately safe. Mild risk possible. Follow up recommended. Read the Comment.
Poorly safe. Evaluate carefully. Use a safer alternative. Read the Comment.
Very High Risk
Not recommended. Cessation of breastfeeding or alternative.
- Кверцетин (Cyrillic)
- Romaszko E, Wiczkowski W, Romaszko J, Honke J, Piskula MK. Exposure of breastfed infants to quercetin after consumption of a single meal rich in quercetin by their mothers. Mol Nutr Food Res. 2014Abstract
- AESAN. Informe del Comité Científico de la Agencia Española de Seguridad Alimentaria y Nutrición (AESAN) sobre condiciones de uso de determinadas sustancias distintas de vitaminas, minerales y plantas para ser empleadas en complementos alimenticios - 1. Revista del comité científico nº 17. 2012 Full text (in our servers)
- Kienzler JL, Sallin D, Schifflers MH, Ghika A. Pharmacokinetics of mono-3'- and mono-4'-0-(beta-hydroxyethyl)-rutoside derivatives, after single doses of Venoruton powder in healthy volunteers. Eur J Clin Pharmacol. 2002Abstract
- Graefe EU, Wittig J, Mueller S, Riethling AK, Uehleke B, Drewelow B, Pforte H, Jacobasch G, Derendorf H, Veit M. Pharmacokinetics and bioavailability of quercetin glycosides in humans. J Clin Pharmacol. 2001Abstract
- Erlund I, Alfthan G, Mäenpää J, Aro A. Tea and coronary heart disease: the flavonoid quercetin is more bioavailable from rutin in women than in men. Arch Intern Med. 2001Abstract
- Olthof MR, Hollman PC, Vree TB, Katan MB. Bioavailabilities of quercetin-3-glucoside and quercetin-4'-glucoside do not differ in humans. J Nutr. 2000Abstract Full text (link to original source) Full text (in our servers)
- McAnlis GT, McEneny J, Pearce J, Young IS. Absorption and antioxidant effects of quercetin from onions, in man. Eur J Clin Nutr. 1999Abstract