Resveratrol is a polyphenol, naturally found in red grape skin, pistachios, peanuts, blueberries and some other berries. It is a powerful antioxidant which can help prevent cell damage caused by free radicals and is reported to possess anti-viral, anti-inflammatory and anti-cancer properties. Data from a new double-blind, placebo-controlled study published in Scientific Reports have linked supplementation with resveratrol, in combination with vitamin D3, with a lower rate of hospitalization in patients 45 years and older who had tested positive for COVID-19.