Vitamin C is a water-soluble vitamin found in citrus and other fruits, berries and vegetables. It is also a generic prescription medication and in some countries is sold as a non-prescription dietary supplement. As a therapy, it is used to prevent and treat scurvy, a disease caused by vitamin C deficiency.
Vitamins are organic molecules that are essential to an organism in small quantities for proper metabolic function. Essential nutrients cannot be synthesized in the organism in sufficient quantities for survival, and therefore must be obtained through the diet. For example, vitamin C can be synthesized by some species but not by others; it is not considered a vitamin in the first instance but is in the second. Most vitamins are not single molecules, but groups of related molecules called vitamers. For example, there are eight vitamers of vitamin E: four tocopherols and four tocotrienols.
A dietary supplement is a manufactured product intended to supplement a person's diet by taking a pill, capsule, tablet, powder, or liquid. A supplement can provide nutrients either extracted from food sources, or that are synthetic. The classes of nutrient compounds in supplements include vitamins, minerals, fiber, fatty acids, and amino acids. Dietary supplements can also contain substances that have not been confirmed as being essential to life, and so are not nutrients per se, but are marketed as having a beneficial biological effect, such as plant pigments or polyphenols. Animals can also be a source of supplement ingredients, such as collagen from chickens or fish for example. These are also sold individually and in combination, and may be combined with nutrient ingredients. The European Commission has also established harmonized rules to help insure that food supplements are safe and appropriately labeled.
Nootropics, colloquially brain supplements, smart drugs and cognitive enhancers, are natural, semisynthetic or synthetic compounds which purportedly improve cognitive functions, such as executive functions, attention or memory.
Nutraceutical is a marketing term used to imply a pharmaceutical effect from a compound or food product that has not been scientifically confirmed or approved to have clinical benefits. In the United States, nutraceuticals are considered and regulated as a subset of foods by the Food and Drug Administration (FDA).
Wheatgrass is the freshly sprouted first leaves of the common wheat plant, used as a food, drink, or dietary supplement. Wheatgrass is served freeze dried or fresh, and so it differs from wheat malt, which is convectively dried. Wheatgrass is allowed to grow longer and taller than wheat malt.
GNC Holdings, LLC is a Chinese-owned American multinational retail and nutritional manufacturing company based in Pittsburgh, Pennsylvania. It specializes in health and nutrition related products, including vitamins, supplements, minerals, herbs, sports nutrition, diet, and energy products. It is a wholly owned subsidiary of Harbin Pharmaceutical Group, a Chinese state-owned pharmaceutical manufacturer.
Leiner Health Products was a company based in Carson, California, and was one of America's largest manufacturers of vitamins, minerals, herbal nutritional supplements, and generic medications. It was founded in 1973, and was owned by North Castle Partners, a private investment firm from Connecticut.
Bodybuilding supplements are dietary supplements commonly used by those involved in bodybuilding, weightlifting, mixed martial arts, and athletics for the purpose of facilitating an increase in lean body mass. Bodybuilding supplements may contain ingredients that are advertised to increase a person's muscle, body weight, athletic performance, and decrease a person's percent body fat for desired muscle definition. Among the most widely used are high protein drinks, pre-workout blends, branched-chain amino acids (BCAA), glutamine, arginine, essential fatty acids, creatine, HMB, whey protein, ZMA, and weight loss products. Supplements are sold either as single ingredient preparations or in the form of "stacks" – proprietary blends of various supplements marketed as offering synergistic advantages.
Megavitamin therapy is the use of large doses of vitamins, often many times greater than the recommended dietary allowance (RDA) in the attempt to prevent or treat diseases. Megavitamin therapy is typically used in alternative medicine by practitioners who call their approach orthomolecular medicine. Vitamins are useful in preventing and treating illnesses specifically associated with dietary vitamin shortfalls, but the conclusions of medical research are that the broad claims of disease treatment by advocates of megavitamin therapy are unsubstantiated by the available evidence. It is generally accepted that doses of any vitamin greatly in excess of nutritional requirements will result either in toxicity or in the excess simply being metabolised; thus evidence in favour of vitamin supplementation supports only doses in the normal range. Critics have described some aspects of orthomolecular medicine as food faddism or even quackery. Research on nutrient supplementation in general suggests that some nutritional supplements might be beneficial, and that others might be harmful; several specific nutritional therapies are associated with an increased likelihood of the condition they are meant to prevent.
Emergen-C is an effervescent, powdered drink mix vitamin supplement manufactured by Alacer Corp. The Emergen-C product line was introduced in 1978. Alacer was established as a private company in 1972, focusing on vitamin supplements containing vitamin C. The company was acquired by Pfizer in 2012. In 2019, Pfizer consumer healthcare entered a joint venture with GSK. The brand is owned by Haleon since 18 July 2022.
Vinpocetine is a synthetic derivative of the vinca alkaloid vincamine, differing by the removal of a hydroxyl group and by being the ethyl rather than the methyl ester of the underlying carboxylic acid. Vincamine is extracted from either the seeds of Voacanga africana or the leaves of Vinca minor.
Vitamin C megadosage is a term describing the consumption or injection of vitamin C in doses well beyond the current United States Recommended Dietary Allowance of 90 milligrams per day, and often well beyond the tolerable upper intake level of 2,000 milligrams per day. There is no strong scientific evidence that vitamin C megadosage helps to cure or prevent cancer, the common cold, or some other medical conditions.
The Alliance for Natural Health (ANH) is an advocacy group founded in 2002 by Robert Verkerk and based in the United Kingdom. ANH was founded to raise funds to finance a legal challenge of the EU Food Supplement Directive. ANH lobbies against regulation of dietary supplements, in favour of pseudo-scientific alternative medicine, and advocates dietary and other lifestyle approaches to health. It also criticises established science showing that Megavitamin therapy lack any health benefit.
ConsumerLab.com, LLC. is a privately held American company registered in White Plains, NY. It is a publisher of test results on health, wellness, and nutrition products. Consumer Labs is not a laboratory, but contracts studies to outside testing laboratories. It purchases dietary supplement products and other consumer goods directly from public storefronts and online retailers, contracts for testing by private laboratories, and publishes reports based on the results. It primarily derives revenue from the sale of subscriptions to its online publications, which are paywalled. Other sources of revenue include a proprietary certification program, licensing fees, contents re-publication license fees, and advertising.
ExtenZe is an herbal nutritional supplement claiming to promote "natural male enhancement", a euphemism for penis enlargement. ExtenZe paid $6 million to settle a class-action false advertising lawsuit in 2010.
The Dietary Supplement Health and Education Act of 1994 ("DSHEA"), is a 1994 statute of United States Federal legislation which defines and regulates dietary supplements. Under the act, supplements are regulated by the FDA for Good Manufacturing Practices under 21 CFR Part 111. The act was intended to exempt the dietary and herbal supplement industry from most FDA drug regulations, allowing them to be sold and marketed without scientific backing for their health and medical claims.
As in the human practice of veganism, vegan dog foods are those formulated with the exclusion of ingredients that contain or were processed with any part of an animal, or any animal byproduct. Vegan dog food may incorporate the use of fruits, vegetables, cereals, legumes including soya, nuts, vegetable oils, as well as any other non-animal based foods.
Pre-workout is a generic term for a range of bodybuilding supplement products used by athletes and weightlifters to enhance athletic performance. Supplements are taken to increase endurance, energy, and focus during a workout. Pre-workout supplements contain a variety of ingredients such as caffeine and creatine, differing by capsule or powder products. The first pre-workout product entered the market in 1982, and since then the category has grown in use. Some pre-workout products contain ingredients linked to adverse effects. Although these products are not regulated, the Food and Drug Administration (FDA) warns consumers to be cautious when consuming them.
New Chapter, Inc. is the American manufacturer of the New Chapter brand of vitamins and other organic dietary supplements. Based in Brattleboro, Vermont, the company is a Public Benefit Corporation (PBC) subsidiary of Procter & Gamble. The company's products include herbal supplements, probiotics, superfood greens and mushrooms.
