Peperine (black pepper extract) can help make quercetin more bioavailable. They are co-administered in many studies on the neuroprotective effects of quercetin: https://scholar.google.com/scholar?hl=en&as_sdt=0,22&q=piperine+quercetin
Peperine (black pepper extract) can help make quercetin more bioavailable. They are co-administered in many studies on the neuroprotective effects of quercetin: https://scholar.google.com/scholar?hl=en&as_sdt=0,22&q=piperine+quercetin