1. The Doctor’s Best Fully Active B Complex provides energy and helps cope with stress.
  2. B vitamins are essential for the production of energy and the production and maintenance of DNA, genes, cells, tissues, organisms and enzymes.
  3. B vitamins are vital to life because they can not be made by human beings and therefore the diet has to be obtained.
  4. The Doctor’s Best Fully Active B Complex offers only the best forms used, including fully active folates (MTHF). It also provides a fully active, well-absorbed vitamin B12.
  5. Non-GMO/Gluten Free/Soy Free/Vegetarian/Vegan

Available Sizes

30 Veggie Caps, 60 Veggie Caps


What is the Best Fully Active B Complex of Doctor?

Doctor’s Best Fully Active B Complex provides energy and helps cope with stress.*B vitamins are needed to generate energy from food and to produce and retain DNA, genes, cells, tissues, organs, and enzymes. Vitamins B are vital to life and can not be made by humans, so we need them through our diet. The best fully active B complex for doctors provides only the best-used forms of vitamin B. This includes full-active folate, the most active folate in the body, and MTHF. For excellent oral absorption, the Fully Active B Complex also offers fully active methylcobalamine (methyl-B12) vitamin B12.

How does it work?

Best Fully Active B Complex is a comprehensive vitamin B supplement carefully designed for optimal absorption and use. This formula provides the safest, most tolerable and most biochemically active forms of B vitamins. Thiamine (“Vitamin B1”) is essential for human metabolism as it is essential for oxygen metabolism. Thiamine is needed to generate energy for our cells ‘ microscopic “power plants” (mitochondria). Riboflavin (“vitamin B2”) is a cofactor for various mitochondrial enzymes and is therefore essential for the production of energy in the body. Riboflavin is a cofactor essential to the metabolism of homocysteine, a normal metabolism product that can become toxic when it accumulates; and a major antioxidant for the use of glutathione. Riboflavin also supports important enzymes for folate recycling and activation of B6. Niacin(‘ vitamin B3’) and niacinamide. This vitamin is fundamental to numerous enzymes that produce energy. The cofactors that power these enzymes are activated readily with neiacin and niacinamide. Vitamin B6 (as pyridoxine and hydrochloridepyridoxal-5-phosphate). This vitamin is essential for at least 112 enzymes to metabolize carbon, amino acids and fatty acids, some 3 percent of all known human enzymes. It is also essential to route potentially harmful homocysteines along the “trans-sulfurization” pathway if glutathione and other important antioxidants are to be produced. Vitamin B6 is essential for the early development of the brain and the metabolism of various transmitters of brain chemicals. Nerve cells rely heavily on B6, both in the brain and elsewhere in the body. Some neuroleptic drugs may impair brain B6 use and increase dietary requirements for B6. Folate (e.g., MTHF, Quatrefolic ® or hydrofolate of methyltetra). This is a major dietary source of methyl groups essential for a number of enzymes that make DNA, repair damaged DNA, and epigenetic control of gene activity. For such housekeeping functions, the central importance of Folate makes it crucial for the health of all our cells, tissues and organs. Folate is also crucial for a healthy pregnancy. Vitamin B12, as methylcobalamine (methyl-B12). To promote methyl metabolism and recycle homocysteine, this vitamin works very closely with folate. The absorption of B12 from foods is heavily dependent on a healthy gastrointestinal tract. It is highly vulnerable and uses over – the-counter and prescription medicines decreases with age. Biotin This B vitamin is incorporated into the molecular structure of at least five carboxylases enzymes that are extensively involved in the metabolism of energy, fats and branched-chain amino acids that are important for many protein functions. Mitochondria requires biotin (along with all other B vitamins) for its energy functions.


How many milligrams are in Doctor’s Best Fully Active B Complex for each of the b vitamins?

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

What is the country of origin of Doctor’s Best products?

The best PhD products are quality tested and produced in the U.S. using highly qualified manufacturers of cGMP and raw materials. The best raw materials and ingredients from doctors around the world are subject to intensive testing and verification regardless of geographical origin.


If you are taking any prescription medication or have a medical condition, consult your healthcare provider before use.


Doctor’s Best was founded in 1990 and is a science-based nutritional complementary company offering over 200 products made with the mostly branded ingredients that are thoroughly researched and tested to the highest standards of quality.

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