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{{short description|Dietary supplement used for bodybuilding}}
'''Bodybuilding supplements''' are [[dietary supplement]]s commonly used by those involved in [[bodybuilding]], weightlifting, mixed martial arts, and [[Athletics (physical culture)|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 [[Protein supplement|high protein drinks]], [[pre-workout]] blends, [[Branched-chain amino acids|branched-chain amino acids (BCAA)]], [[glutamine]], [[arginine]], [[essential fatty acids]], [[creatine]], [[beta-Hydroxy beta-methylbutyric acid|HMB]], [[whey protein]], [[ZMA (supplement)|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.

==History==
[[Athletes in ancient Greece]] were advised to consume large quantities of meat and wine. A number of herbal concoctions and tonics have been used by strong men and athletes since ancient times across cultures to try to increase their strength and stamina.

In the 1910s, [[Eugen Sandow]], widely considered to be the first modern bodybuilder in the West, advocated the use of dietary control to enhance muscle growth. Later, bodybuilder Earle Liederman advocated the use of "beef juice" or "beef extract" (basically, [[consomme]]) as a way to enhance muscle recovery. In the 1950s, with recreational and competitive bodybuilding becoming increasingly popular, Irvin P. Johnson began to popularize and market [[egg]]-based protein powders marketed specifically at bodybuilders and physical athletes. The 1970s and 1980s marked a dramatic increase in the growth of the bodybuilding supplement industry, fueled by the widespread use of modern marketing techniques and a marked increase in recreational bodybuilding.

In October 1994, the [[Dietary Supplement Health and Education Act]] (DSHEA) was signed into law in the USA. Under DSHEA, responsibility for determining the safety of the [[Dietary supplement|dietary supplements]] changed from the government to the manufacturer, and supplements no longer required approval from the U.S. [[Food and Drug Administration]] (FDA) before distributing the products. Since that time, manufacturers did not have to provide FDA with the evidence to substantiate safety or effectiveness unless a new dietary ingredient was added. It is widely believed that the 1994 DSHEA further consolidated the position of the supplement industry and lead to additional product sales.

==Protein==
{{see further|Protein quality|Protein supplement}}
[[File:Protein shake.jpg|thumb|Protein shakes, made from protein powder (center) and milk (left), are a common bodybuilding supplement.]]

[[Bodybuilder]]s may supplement their diets with [[protein in nutrition|protein]] for reasons of convenience, lower cost (relative to meat and fish products), ease of preparation, and to avoid the concurrent consumption of carbohydrates and fats. Additionally, some argue that bodybuilders, by virtue of their unique training and goals, require higher-than-average quantities of protein to support maximal muscle growth. While the recommended dietary allowance is much less, Harvard Medical School points out in Health Health Publishing that this RDA (recommended daily allowance) is “the minimum amount you need to keep from getting sick — not the specific amount you are supposed to eat every day.” Protein supplements are sold in ready-to-drink [[health shake]]s, bars, meal replacement products (see below), bites, oats, gels and powders. Protein powders are the most popular and may have flavoring added for palatability. The powder is usually mixed with water, milk or fruit juice and is generally consumed immediately before and after exercising or in place of a meal. The sources of protein are as follows and differ in [[protein quality]] depending on their amino acid profile and digestibility:

* [[Whey protein]] contains high levels of all the [[essential amino acids]] and [[branched-chain amino acids]]. It also has the highest content of the amino acid [[cysteine]], which aids in the biosynthesis of [[glutathione]]. For bodybuilders, whey protein provides amino acids used to aid in muscle recovery. Whey protein is derived from the process of making [[cheese]] from [[milk]]. There are three types of whey protein: whey concentrate, whey isolate, and whey hydrolysate. Whey concentrate is 29–89% protein by weight whereas whey isolate is 90%+ protein by weight. Whey hydrolysate is enzymatically predigested and therefore has the highest rate of digestion of all protein types.
* [[Casein protein]] (or milk protein) has [[glutamine]], and [[casomorphin]].

[[File:Osaka protein shaker.jpg|thumb|upright|Shaker Bottle commonly used to mix supplements. Often has mesh or a metal whisk inside to breakdown lumps in the mixture.]]

Some nutritionists have suggested that higher calcium excretion may be due to a corresponding increase in protein-induced calcium absorption in the intestines.

===Amino acids===
Some bodybuilders believe that amino acid supplements may benefit muscle development, but consumption of such supplements is unnecessary in a diet that already includes adequate protein intake.

==Prohormones==
{{Main|Androgen prohormone}}
An androgen prohormone, or proandrogen, is a [[prohormone]] (or [[prodrug]]) of an [[anabolic-androgenic steroid]] (AAS). They can be prohormones of [[testosterone]] or of [[synthetic compound|synthetic]] AAS, for example, [[nandrolone]] (19-nortestosterone). [[Dehydroepiandrosterone]] (DHEA), [[DHEA sulfate]] (DHEA-S), and [[androstenedione]] may all be considered proandrogens of testosterone.

Since 2005, the use of steroid precursors (prohormones) has been illegal in the U.S.

==Creatine==
{{Main|Creatine supplements}}
[[Creatine]] is an [[organic acid]] naturally occurring in the body that supplies energy to muscle cells for short bursts of energy (as required in lifting weights) via [[creatine phosphate]] replenishment of [[Adenosine triphosphate|ATP]]. Scientific studies have shown that creatine supplementation can increase the consumer's strength, energy during performance, muscle mass, and recovery times after exercise. In addition, recent studies have also shown that creatine improves brain function. and reduces mental fatigue.

Some studies have suggested that consumption of creatine with protein and carbohydrates can have a greater effect than creatine combined with either protein or carbohydrates alone.

While generally considered safe, long-term or excessive consumption of creatine may have an adverse effect on the [[kidneys]], liver, or heart and should be avoided if any pre-existing conditions affecting these organs exist.

==β-Hydroxy β-methylbutyrate==
{{Main|Beta-Hydroxy beta-methylbutyric acid}}
When combined with an appropriate exercise program, dietary supplementation with [[β-hydroxy β-methylbutyrate]] (HMB) has been shown to [[dose-dependent]]ly augment gains in [[muscle hypertrophy]] (i.e., the size of a muscle), [[Physical strength|muscle strength]], and [[lean body mass]], reduce exercise-induced skeletal muscle damage,{{#tag:ref|The effect of HMB on skeletal muscle damage has been assessed in studies using four different [[Biomarker (medicine)|biomarkers]] of muscle damage or protein breakdown: [[blood serum|serum]] [[creatine kinase]], serum [[lactate dehydrogenase]], urinary [[urea nitrogen]], and urinary [[3-methylhistidine]].  When exercise intensity and volume are sufficient to cause skeletal muscle damage, such as during [[long-distance running]] or [[progressive overload]], HMB supplementation has been demonstrated to attenuate the rise in these biomarkers by 20–60%. and expedite recovery from high-intensity exercise. HMB is believed to produce these effects by increasing muscle protein synthesis and decreasing muscle protein breakdown by various mechanisms, including activation of the [[mechanistic target of rapamycin]] (mTOR) and inhibition of the [[proteasome]] in skeletal muscles.

The inhibition of exercise-induced skeletal muscle damage by HMB is affected by the time that it is used relative to exercise. The greatest reduction in skeletal muscle damage from a single bout of exercise appears to occur when calcium HMB is ingested 1–2&nbsp;hours prior to exercise.

==Controversy==

=== Mislabeling and adulteration===
While many of the claims are based on scientifically-based physiological or biochemical processes, their use in bodybuilding parlance is often heavily colored by bodybuilding lore and industry marketing and, as such, may deviate considerably from traditional scientific usages of the terms. In addition, ingredients listed have been found at times to be different from the contents. In 2015, [[Consumer Reports]] reported unsafe levels of [[arsenic]], [[cadmium]], [[lead]], and [[Mercury (element)|mercury]] in several of the protein powders that were tested.

In the United States, the manufacturers of dietary supplements do not need to provide the Food and Drug Administration with evidence of product safety prior to marketing.  As a result, the incidence of products adulterated with illegal ingredients has continued to rise. In 2013, one-third of the supplements tested were adulterated with unlisted steroids.  More recently, the prevalence of [[designer steroid]]s with unknown safety and pharmacological effects has increased.
In 2015, a [[Canadian Broadcasting Corporation|CBC]] investigative report found that protein spiking (i.e., the addition of amino-acid filler to manipulate analysis) was not uncommon;

=== Health problems ===
{{tone|section|date=September 2020}}
The US FDA reports 50,000 health problems a year due to dietary supplements and these often involve bodybuilding supplements. For example, the "natural" best-seller Craze, 2012's "New Supplement of the Year" by bodybuilding.com, widely sold in stores such as [[Walmart]] and [[Amazon (company)|Amazon]], was found to contain [[N,alpha-Diethylphenylethylamine]], a [[methamphetamine]] analog.

The incidence of [[hepatotoxicity|liver damage]] from herbal and dietary supplements is about 16&ndash;20% of all supplement products causing injury, with the occurrence growing globally over the early 21st century. The most common liver injuries from weight loss and bodybuilding supplements involve [[Hepatocyte|hepatocellular]] damage and [[jaundice]]. The most common supplement ingredients attributed to these injuries are [[catechin]]s from [[green tea]], [[anabolic steroid]]s, and the herbal [[extract]], [[Aegle marmelos|aegeline]]. Other products by supplement designer and CEO of Driven Sports, Matt Cahill, have contained dangerous substances causing blindness or liver damage, and his pre-workout supplement ''Craze'' was found to contain illegal stimulants

===Protein effectiveness===
Some have argued that there is little evidence to indicate any benefit to using bodybuilding protein or [[amino acid]] supplements. A 2005 overview concluded that "[i]n view of the lack of compelling evidence to the contrary, no additional dietary protein is suggested for healthy adults undertaking resistance or endurance exercise".

In contrast, a 2018 systematic review, meta-analysis and meta-regression concluded that, “Dietary protein supplementation significantly enhanced changes in muscle strength and size during prolonged RET in healthy adults.“ (RET is an abbreviation for resistance exercise training.)

== See also ==
* [[Instant breakfast]]
* [[protein in nutrition|Protein]]
* [[Protein bar]]

== External links ==
{{commons category}}
* {{cite web | url = https://www.fda.gov/food/dietarysupplements/default.htm | title = Dietary Supplement Health and Education Act of 1994 | work = U.S. Food and Drug Administration | date = 4 February 2020 }}

{{Pharmacological body modification}}
{{Dietary supplement}}
{{Diets}}

{{DEFAULTSORT:Bodybuilding Supplement}}
[[Category:Bodybuilding supplements| ]]
[[Category:Instant foods and drinks]]