FIGURE 3.

Quantities of food and beverages that must be consumed to reach therapeutic doses. Based on animal studies, daily resveratrol doses in the range of hundreds of milligrams to several grams for therapeutic intervention have been proposed. If a person intends to ingest 1 g resveratrol each day, this would require consuming the depicted quantities of foods or beverages. The calculation is based on typical resveratrol contents found in peanuts without seed coats (0.03–0.14 μg/g) (126), red wine (Pinot noir from France, 0.362–1.979 mg/L) (127), white wine (Riesling from Spain, 0.057–0.390 mg/L) (128), rosé wine from Serbia (0.29 mg/L) (129), beer (1.34–77.0 μg/L) (130), skin of tomato (∼19 μg/g dry weight) (131), dark chocolate (350 μg/kg), milk chocolate (100 μg/kg) (132), Itadori tea (68 μg/100 mL, when prepared by infusing 1 g of the commercial root prepared with 100 mL of boiling water for 5 min) (37), red Merlot grapes from Japan (1259 μg/kg fresh weight) (133), white Riesling grapes from Japan (387 μg/kg fresh weight) (133), and cultivated apples (estimating a mean total content of 400 μg/kg fresh weight found in 150 different cultivars) (4).