Quercetin can be found in rich concentrations in some fruits, vegetables and herbs- that are safe for your dogs and cats. These include:

- Apples (fresh)

- Berries

- Bananas

- Broccoli

- Cherries (Dark)

- Garlic (Fresh)

- Grapefruit (Particularly white grapefruit) and grapefruit seed extract

- Green Tea

- Gingko biloba

- Chamomile Tea

- Parsley

- Summer Squash

- St. John's Wort

Give with Bromeliad (pineapple derived digestive enzyme) to help with digestion. Ratio is 1/4-1/3 amount of Bromeliad to Quercetin.


Do Not give this drug with antibiotics or cyclosporine.

In very high doses, can cause kidney failure.

Do Not give to pregnant or lactating dogs or cats.

St. John's Wort Flower

What is Quercetin?


Multiply weight of dog (lbs) by 8. For example, a 50 lb dog should receive 400 mg of Quercetin once a day. Can be divided in half and given twice a day.

Chamomile Plant

Quercetin is sometimes considered nature's Benadryl. It is a naturally occurring flavonoid found in many plants. Flavonoids (or bioflavonoids) are plant-pigments that play an essential role in attracting pollinators to plants. Flavonoids also offer a host of beneficial properties to humans, dogs, cats and other animals.

Quercetin is :

- anti-allergenic (anti-histamine)

- anti-carcinogenic

- antifungal

- anti-inflammatory

- anti-microbial

- anti-viral