Drinking black tea may protect your heart

Black tea

They said quercetin also works to protect vessels against hypochlorous acid-induced endothelial dysfunction in isolated arteries.

"We believe [quercetin] works by upregulating Heme-oxygenase which is an antioxidant enzyme that can then protect the vessels against oxidant induced damage," they said.

The study was published in the journal of Biochemical Pharmacology.

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