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Fully Active B Complex

30 Veggie Caps DRB-00299

The best boost.

Our Fully Active B Complex with Quatrefolic® is a full-spectrum B vitamin supplement that  provides much-needed energy.* It features active forms of vitamins B1‚ B2‚ B6‚ B12 alongside the Quatrefolic® brand of folate. Carefully designed for optimal absorption and utilization, this formulation provides B vitamins in their safest, best tolerated, and most biochemically active forms.* Why supplement? B vitamins are needed to make energy from foods, and to make and maintain DNA, genes, cells, tissues, organs, and enzyme functions.These B vitamins are fundamental to life, and we can’t make them ourselves. 

  • Non-GMO
  • Gluten Free
  • Soy Free
  • Vegan
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Fully Active Bs! Due to some genetic mutations (SNPs) I need to take my Bs in an 'active' form. Doctor's Best is one of the few companies that actually makes a 'fully active' B-Complex – AND makes it affordable! These have become a mainstay in my supp routine.

Reviewed in the United States on January 30,

I love this brand of supplements I get this burst of energy when I take these vitamins or any supplements made by this brand. I will always buy and trust in this brand of supplements.

Reviewed in the United States on April 12,

They improve my energy My energy does improve when I take these. It makes quite a difference. I can’t function without them.

Reviewed in the United States on August 21,
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Bs & Qs.

Our trusted partners are key in bringing you the best products. Quatrefolic® is an innovative dietary ingredient that’s highly bioavailable, providing the most superior formulation.* Quatrefolic® has greater stability, higher water solubility and multiple ingredients formulation flexibility, making it the ideal ingredient to use in our formulas. 

Suggested Use

Each veggie capsule contains 40 mg vitamin C, 60 mg vitamin B1, 75 mg vitamin B2, 50 mg vitamin B3, 50 mg vitamin B6, 400 mcg DFE Folate (from Quatrefolic®), 1000 mcg vitamin B12, 600 mcg Biotin and 100 mg Pantothenic Acid. Take one capsule daily with food.


Vitamin B2 (as riboflavin) - 65mg

Vitamin B2 (as riboflavin-5-Phosphate) - 10mg

Vitamin B3 (as niacin) - 20mg

Vitamin B3 (as niacinamide) - 30mg

Vitamin B6 (as pyridoxine hydrochloride) - 40mg

Vitamin B6 (as pyridoxal-5-phosphate) - 10mg

Doctor's Best products are quality tested and manufactured in the United States using highly qualified cGMP manufacturers and raw material ingredients. Doctor's Best sources raw materials from around the world and ingredients are subject to the intense testing and verification regardless of geography of origin.

Doctor's Best products can be found at vitamin specialty, chain and independent natural product stores across the country, as well as online. We recommend that you use our online Where to Buy store finder to find a store near you or one of our online partners who can ship to you directly.