How much ActiVin grape seed extract should I take?
While the FDA has not established RDAs for grape seed extract, ActiVin research has studied daily doses ranging between 50 mg to 200 mg. A leading grape seed extract researcher, Debasis Bagchi recommends a daily dose of 50 mg for adults ages 30 years to 40 years, 100 mg for adults ages 40 years to 50 years, and 200 mg for adults older than 50 years.