For Dogs

Dr. Jones' Extra Strength Ultimate BioActive Quercetin is a powerful antioxidant with antihistamine, anti-inflammatory, and antiviral properties. The supplement contains naturally sourced Sophora Japonica flower extract, in capsule form (powder in capsules), and is generally more bio-available than other quercetin forms. Each Extra Strength capsule contains 150mg quercetin, with 30 capsules per jar.

Extra Strength version is Recommended for Medium to Large Dogs Only.

For cats and smaller dogs, you can find our regular strength (50mg) capsules here.

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