The B vitamins are eight water-soluble vitamins that play important roles in cell metabolism. Historically, the B vitamins were once thought to be a single vitamin, referred to as Vitamin B (much like how people refer to Vitamin C or Vitamin D). Later research showed that they are chemically distinct vitamins that often coexist in the same foods.
Supplements containing all eight B vitamins are generally referred to as a vitamin B complex. Individual B vitamin supplements are referred to by the specific name of each vitamin (e.g. B1, B2, B3).
B vitamins deficiency
Several named vitamin deficiency diseases may result from the lack of sufficient B-vitamins.
Vitamin B1 (Thiamine) deficiency causes Beriberi. Symptoms of this disease of the nervous system include weight loss, emotional disturbances, Wernicke's encephalopathy (impaired sensory perception), weakness and pain in the limbs, periods of irregular heartbeat, and edema (swelling of bodily tissues). Heart failure and death may occur in advanced cases. Chronic thiamine deficiency can also cause Korsakoff's syndrome, an irreversible psychosis characterized by amnesia and confabulation.
Vitamin B2 (Riboflavin) deficiency causes Ariboflavinosis. Symptoms may include cheilosis (cracks in the lips), high sensitivity to sunlight, angular cheilitis, glossitis (inflammation of the tongue), seborrheic dermatitis or pseudo-syphilis (particularly affecting the scrotum or labia majora and the mouth), pharyngitis, hyperemia, and edema of the pharyngeal and oral mucosa.
Vitamin B3 (Niacin) deficiency, along with a deficiency of tryptophan causes Pellagra. Symptoms include aggression, dermatitis, insomnia, weakness, mental confusion, and diarrhea. In advanced cases, pellagra may lead to dementia and death.
Deficiencies of other B vitamins result in symptoms that are not part of a named deficiency disease.
Vitamin B5 (Pantothenic acid) deficiency can result in acne and Paresthesia, although it is uncommon.
Vitamin B6 (Pyridoxine) deficiency may lead to anemia, depression, dermatitis, high blood pressure (hypertension), water retention, and elevated levels of homocysteine.
Vitamin B7 deficiency does not typically cause symptoms in adults but may lead to impaired growth and neurological disorders in infants.
Vitamin B9 (Folic acid) deficiency results in elevated levels of homocysteine. Deficiency in pregnant women can lead to birth defects. Supplementation is often recommended during pregnancy. Researchers have shown that folic acid might also slow the insidious effects of age on the brain.
Vitamin B12 (Cobalamin) deficiency causes pernicious anemia, memory loss and other cognitive decline. It is most likely to occur among elderly people as absorption through the gut declines with age. In extreme (fortunately rare) cases, paralysis can result.
Active B Complex 60 vcaps | Genestra - Co-enzymatic vitamin B’s: The body’s natural active form for energy production and metabolism.*(hide)
Active B Complex 60 vegcaps | Bioclinic Naturals - Helps to prevent B vitamin deficiencies and form red blood cells, as well as for normal growth and development*(hide)
Active B-Complex 60 vcaps | Integrative Therapeutics - Contains Quatrefolic® brand L-Methylfolate, the bioactive form of folate- Supports healthy methylation.*(hide)
Aller-B 90 caps | Progressive Labs - Aller-B is a high potency B complex in capsule form containing no allergy-provoking fillers and binders*(hide)
Allithiamine (Vitamin B1) 50 mg caps | Ecological Formulas - Thiamine is also known as vitamin B1‚ transforms proteins‚ fats‚ and carbohydrates from your diet into energy.*(hide)
B Complex Neuro Factors 60 vegcaps | Protocol For Life Balance - B Vitamins are also important for the maintenance of normal nervous system function, blood cell production, and countless other metabolic processes.*(hide)
B-100 Complex 60 tabs | Vinco - comprehensive B supplement providing all of the essential B vitamins as well as related nutrients in a pH responsive (sustained-release) process that protects the tablet from gastric deactivation thus ensuring maximum bioavailability at the site of intestinal absorption*(hide)
B-Complex (Phosphorylated) 100 vcaps | Metabolic Maintenance - Our B vitamins are formulated for superior absorption. They contain: • Only highly bioavailable forms • The phosphorylated forms of vitamins B-2 and B-6 • Methylated forms of B-12 and folate*(hide)
B-Complex 60 Caps | Pharmax - B Complex is a highly concentrated full range of B vitamins.*
B-Complex | Innate Response Formulas - 100% Whole food vitamins and minerals delivered in our proprietary FoodState® food concentrates.*(hide)
B-Complex Liquid 3.9 fl oz | Pure Encapsulations - B vitamins are essential for the proper functioning of the nervous system and are perhaps the most important nutritional factor for healthy nerve cells.*
B-Complex Plus - Now with Metafolin® L-5-MTHF Balanced B vitamin formula*
B-Complex with Metafolin and Intrinsic Factor 60 caps | Douglas Laboratories comprehensive formula including Metafolin, Methylcobalamin Vitamin B12, and Intrinsic Factor in its formulation*(hide)
B-Plex - 120 tabs | Karuna - Comprehensive high potency B-complex*
B-Supreme vcaps | Designs For Health - This very powerful activated B vitamin formula supplies most of the B vitamins in the activated state for easy absorption and use*(hide)
B6 + B Complex | Vital Nutrients provides a high dose of vitamin B6 combined with the rest of the B Vitamin Essential for tonifying the nervous system *(hide)
BenfoMax 90 caps | Pure Encapsulations - BenfoMax maintains healthy advanced glycation end (AGE) product activity which supports vascular, nerve, retinal and kidney health.*(hide)
Benfotiamine 60 caps | ProThera - Benfotiamine (technically known as s-benzoylthiamine-o-monophosphate) is a synthetic fat-soluble form of thiamine (Vitamin B1). It is highly effective at increasing plasma and cellular levels of thiamine diphosphate (TDP). TDP is the metabolically active coenzyme form of B1.*(hide)
Biotin 5000 | BioGenesis - Biotin 5000 provides a potent source of biotin, an essential B vitamin that functions as a cofactor for numerous key biological pathways. A convenient liquid form and delicious vanilla-mint flavor*(hide)
Biotin 8 mg 120 vcaps | Pure Encapsulations - water-soluble B vitamin that is an essential co-factor for a number of metabolic processes*(hide)
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