The product provides high doses of a comprehensive B-complex and includes beneficial cofactors. However, it primarily utilizes conventional forms of B vitamins, which are generally effective but not as bioavailable as active forms.
This B-100 complex from NOW provides a substantial dose of essential B vitamins, with most core B vitamins present at 100mg or 100mcg. This higher potency is ideal for individuals seeking more intensive support for energy production, stress response, and overall metabolic function. It features common, effective forms like Thiamine Hydrochloride and Pyridoxine Hydrochloride, and uses Niacinamide to avoid the typical niacin flush.
Beyond the core B vitamins, it includes helpful cofactors such as Choline Bitartrate, Inositol, and PABA, which contribute to various physiological processes including cell membrane health and neurotransmitter support. Offered in a large 250-count bottle, it provides excellent long-term value for consistent high-dose supplementation.
- High potency (100mg/mcg) for comprehensive B vitamin support.
- Includes Choline, Inositol, and PABA for added benefits.
- Niacin is in the flush-free Niacinamide form.
- Excellent price per serving for a large quantity bottle.
- Uses conventional (non-active) forms for several B vitamins (e.g., Pyridoxine HCl, Cyanocobalamin).
- Folate form is not specified as active (likely folic acid).
- Choline and Inositol doses are relatively low for a B-100 complex.
- Higher doses of B vitamins may cause a bright yellow discoloration of urine, which is normal.
- If you have a history of sensitivity to supplements, consider starting with a lower dose or consulting a health professional.



