There is no proven safe or effective dose of holy basil. Traditionally, 300-2,000 milligrams as a single dose of dried leaves has been used daily for preventive therapy, and 600-1,800 milligrams in divided doses has been used daily for curative therapy. As a tea, 2 grams holy basil has been infused in one cup of water. Also, 10-20 milliliters of fresh leaf juice or 1 ounce of dried herb in 16 ounces of water, three times daily in 5 ounce doses has been used. For diabetes, 2.5 grams of dried leaf powder by mouth every morning, or 1 teaspoon dried herb brewed in one cup of water three times a day have been used.
You should read product labels, and discuss all therapies with a qualified healthcare provider. Natural Standard information does not constitute medical advice, diagnosis, or treatment.