Quercetin is found in many fruits and vegetables and is safe to consume. As a supplement, it appears to be generally safe with little to no side effects. In some instances, taking more than 1,000 ...

Pregnancy and breast-feeding: There isn't enough reliable information to know if quercetin is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use. Kidney problems ...

According to Mount Sinai, quercetin is generally considered safe, yet pregnant and breastfeeding women and adults living with kidney disease should avoid taking this supplement. Typical side ...

And while the supplement form of quercetin has well-demonstrated tolerability and has received the U.S. Food & Drug Administration's Generally Recognized As Safe (GRAS) status for use as a ...

But, it’s always best to talk to your doctor first. Quercetin is generally safe. Eating an abundance of flavonoid-rich foods is also encouraged. But, taking quercetin supplements at high doses ...

Our editors also may be in touch with follow-up questions. Quercetin is a flavonoid present in several plant foods, such as berries, broccoli, cherries, citrus fruits, grapes and onions.

With medical supervision, quercetin has been safely used in amounts of up to 1 gram daily for 12 weeks. There is not enough evidence to know if it is safe for long-term use (longer than 12 weeks).

And while the supplement form of quercetin has well-demonstrated tolerability and has received the U.S. Food & Drug Administration's Generally Recognized As Safe (GRAS) status for use as a dietary ...