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According to the B1: 1.1 milligrams (mg) B2: 1.1 mg B3: 14 mg NE B5: 5 mg B6: 1.3 mg Biotin: 30 micrograms (mcg) Folic acid: 400 mcg DFE B12: 2.4 mcg For men, the NIH recommends the following daily intake: B1: 1.2 mg B2: 1.3 mg B3: 16 mg NE B5: 5 mg B6: 1.3 mg Biotin: 30 mcg Folic acid: 400 mcg DFE B12: 2.4 mcg Adults aged 65 years and older and people who are higher risk of B vitamin deficiency , so your recommended intake may be higher

"Vitamin B12 is an essential nutrient for human health," Elizabeth Ko, assistant clinical professor of medicine at UCLA's David Geffen School of Medicine, told InStyle

Test before you start and again at 48 weeks

Stud Nat Prod Chem 67:411461