Category Archives: Testosterone

Tongkat Ali (Eurycoma longifolia): Reproductive Function

Posted on September 25, 2023 by Robert Barrington

Tongkat Ali (Eurycoma longifolia) is a herb that is sometimes called Malaysian ginseng on account of its similar properties to Panax ginseng. Evidence suggests that Tongkat Ali has a number of biochemical effects in humans that include a significant ability … Continue reading →

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Vitamin D and Testosterone

Posted on September 9, 2023 by Robert Barrington

Vitamin D is actually a steroid hormone. The main role associated with vitamin D is that of calcium regulation, but as more is understood about the compounds the more roles are discovered. Because vitamin D is a steroid hormone, it … Continue reading →

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D-aspartate and Steroidogenesis

Posted on September 4, 2023 by Robert Barrington

D-amino acids are unusual because the predominant form for amino acids in humans and mammals are the L-form. However, a number of D-form amino acids are found. In particular, D-aspartic acid is an amino acid that may play a central … Continue reading →

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Does HMB Raise Testosterone Levels?

Posted on July 28, 2023 by Robert Barrington

Beta-hydroxy beta-methylbutyrate (HMB) is a metabolite of the essential and branched chain amino acid, leucine. HMB has become popular amongst strength athletes because evidence suggests that it can increase lean body mass. The mechanisms for this are not fully understood, … Continue reading →

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Alcohol Inhibits Luteinizing Hormone

Posted on July 17, 2023 by Robert Barrington

Alcohol may inhibit the release of luteinizing hormone in animals and humans. Alcohol (ethanol) is able to stimulate the release of GABA and β-endorphin and inhibit the production of nitric oxide (which stipulates luteinizing hormone release). Drugs that block β-endorphin … Continue reading →

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Taurine and Testosterone

Posted on July 14, 2023 by Robert Barrington

Taurine is also known as 2-aminoethane sulphonic acid. Taurine is one of the most abundant low molecular weight substances in humans and animals. Although an amino acid, taurine is not used in protein synthesis, but instead plays a role in … Continue reading →

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Luteinizing hormone and its Release

Posted on July 13, 2023 by Robert Barrington

Luteinizing hormone is an important step in the synthesis of testosterone. Luteinizing hormone is produced by the anterior pituitary in response to signals from the hypothalamus in the brain. Luteinizing hormone is important because it enters the circulation and stimulates … Continue reading →

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Ethanol, Resistance Training and Ethanol

Posted on July 5, 2023 by Robert Barrington

Alcohol can have detrimental health outcomes because ethanol can act as a cellular toxin through generation of metabolites. However, ethanol also has a number of health benefits that may be evident at lower intakes. One aspect of alcohol that is … Continue reading →

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Does D-Aspartate Supplementation Reduce Oestrogen Levels?

Posted on July 3, 2023 by Robert Barrington

D-aspartate (D-aspartic acid) is a supplement that may have a number of effects on mammalian hormonal regulation. One controversial aspect of D-aspartate supplementation is whether or not the supplements are able to elevate testosterone in healthy men. This effect would … Continue reading →

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D-Aspartic Acid and Luteinising Hormone

Posted on June 22, 2023 by Robert Barrington

Evidence from animal studies suggests that D-aspartic acid is able to stimulate the synthesis of testosterone. One way this may happen is through the interaction of the D-aspartic acid with the testes themselves. In leydig cells, D-aspartic acid may upregulate … Continue reading →

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