The RDA (Recommended Dietary Allowance) of Vitamin B9 established by ICMR is 220mcg per day for females and 300mcg per day for males. On Unbox Health, Vitamin B9 dosage brackets are defined based on the Vitamin B9 content (total per capsule) claimed on a product's label: Very Low (0-80mcg), Low (80-180mcg), Medium (180-300mcg), High (300-500mcg), Very High (500+ mcg).