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.
Complete B Complex 60 caps | Life Extension Foundation - contains potent, but safe, and scientifically validated amounts of the B vitamins*(hide)
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Glycogenics B-Complex+C 60/180 tabs | Metagenics - advanced, balanced B-complex formula that features a blend of B vitamins and complementary nutrients*(hide)
HiBiotin 90 veg caps | Allergy Research Group - High dose biotin. Biotin is an essential co-enzyme used in variety of carboxylation reactions, and is involved in the metabolism of fats, sugars and amino acids*(hide)
Liposomal B Supreme 1.7 oz | Designs for Health - provides B vitamins (thiamin, riboflavin, niacin, pantothenic acid, B6, folate, biotin and B12) formulated with liposomal technology.*(hide)
LipoZome-B 2 oz | Nutrasal - LipoZome-B is highly absorbed and combines our proprietary Liposome Active Delivery System is bioperin for maxium absorption*(hide)
Mega Benfotiamine 250 mg 120 vcaps | Life Extension Foundation - a fat-soluble form of vitamin B1 (thiamine), supports healthy blood sugar metabolism and helps protect the body’s tissues against advanced glycation end products and oxidative stress.x*(hide)
Methyl B-Complex Liposomal 1.7 oz | QuickSilver Scientific - Our liposomal B-Complex is the first of its kind to pack such a complex array of B-vitamin chemistry into a single, comprehensive product*(hide)
NiaCel 125mg 60 | Thorne Research - nutritional breakthrough supplement that:
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NiaCel 250mg 60 | Thorne Research - increases the body's ability to produce energy, supports cognitive function and provides neuroprotection. Niacel provides neurological, metabolic, and muscle endurance support.*(hide)
Niacin CRT 500 mg 60 Tablets | Designs for Health - Many of you have seen excellent results in maintaining normal cholesterol levels with time-release niacin. Controlled Release Technology (CRT) is the latest technology for delivering niacin in a continuous, controlled rate over a 12-14 hour period.(hide)
Niacin CRT 750 mg 60 Tablets | Designs for Health - Many of you have seen excellent results in maintaining normal cholesterol levels with time-release niacin. Controlled Release Technology (CRT) is the latest technology for delivering niacin in a continuous, controlled rate over a 12-14 hour period.*(hide)
Niatain 60 tabs | Metagenics - offers clinically evaluated, extended niacin delivery for a more comfortable approach to healthy lipid metabolism support with reduced flushing potential*(hide)
Pantethine Plus | Integrative Therapeutics - Pantethine Plus combines two ingredients that work synergisticaly to help you retain healthy cholesterol levels when within normal limits.*(hide)
Priority B-Complex 60 vcaps | Priority One - Adequate daily intake of vitamins such as B-1‚ B-2‚ B-6‚ and the bio available form of B-12 (Methylcobalamin) directly affect normal physiological activity in healthy individuals.*(hide)
P-5-P - The phosphorylated form of vitamin B-6, is the most bioavailable form of this critical nutrient. Vitamin B-6 is involved in important functions in the body including the manufacturing of brain chemicals known as neurotransmitters.*(hide)
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