The vi-ta-min B-complex refers to lớn all of the known essential vitamins except for vi-ta-min C. These include thiamine (vitamin B1), riboflavin (vitamin B2), niacin (vitamin B3), pantothenic acid (vitamin B5), pyridoxine (vitamin B6), biotin, folic acid and the cobalamins (vitamin B12).

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"Vitamin B" once thought lớn be a single nutrient . Researchers later discovered these extracts contained several vitamins, which were given distinguishing numbers, leading many people to the erroneous conclusion that these vitamins have a special relationship lớn each other. Further adding khổng lồ confusion has been the "unofficial" designation of other, non-essential vitamins, as members of the B-complex, such as choline, inositol, & para-aminobenzoic acid (PABA).

Each member of the B-complex has a unique structure and performs chất lượng functions in the human body. Vitamins B1, B2, B3, and biotin participate in different aspects of energy production, vi-ta-min B6 is essential for amino acid metabolism, and vitamin B12 and folic acid facilitate steps required for cell division.

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Each of these vitamins has many additional functions, though none that require all B-complex vitamins simultaneously. Human requirements for each B vitamin vary considerably—from 3 mcg per day for vitamin B12 lớn 18 mg per day for vi-ta-min B3 in adult males, for example. So, taking equal amounts of each one—as provided in many B-complex supplements—makes little sense. Megadoses of B-complex vitamins sometimes taken to lớn combat everyday stress, boost energy, or control food cravings, bởi not appear khổng lồ offer benefit unless a person is deficient in one or more of them.

Most multivitamin-mineral products contain the B-complex along with the rest of the essential vitamins & minerals. Since they are more complete than B-complex vitamins alone, multiple vitamin-mineral supplements are recommended lớn improve overall micronutrient intake và prevent deficiencies.

What Are Star Ratings?

Our proprietary "Star-Rating" system developed lớn help you easily understand the amount of scientific support behind each supplement in relation lớn a specific health condition. While there is no khổng lồ predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, và whether studies have found them lớn be effective for other people.

For over a decade, our team has combed through thousands of research articles published in reputable journals. Lớn help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource lớn make informed decisions your health and well-being.

3 Stars Reliable & relatively consistent scientific data showing a substantial health benefit.

2 Stars Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.

1 Star For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.