November 2024 in “Psychoneuroendocrinology” Testosterone increases hair testosterone levels, stress raises hair cortisol, and relationship status affects hormone levels.
October 2024 in “Journal of the Endocrine Society” Leydig cell tumors can cause high testosterone and symptoms in postmenopausal women, and removing them improves symptoms.
110 citations
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January 1984 in “Progress in brain research” Gonadal hormones may influence sex differences in play fighting in animals, but their effect on human spatial behavior is unclear and needs more research.
15 citations
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September 2014 in “JAMA Dermatology” 8 citations
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December 2022 in “International journal of molecular sciences” Mice without the enzyme HSD17B3 still produce normal testosterone, suggesting they have different ways to make it compared to humans.
24 citations
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October 2012 in “The International Journal of Biochemistry & Cell Biology” Testosterone protects female heart cells from stress by activating estrogen receptors.
506 citations
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March 2005 in “The Journal of Clinical Endocrinology and Metabolism” Testosterone therapy improves physical function, strength, and body composition in older men with low testosterone levels.
November 2022 in “Journal of the Endocrine Society” A woman's masculine symptoms were caused by a rare tumor in her left ovary, which was found using a special blood test.
8 citations
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July 2018 in “Analytical sciences” Using 5-butylpicolinate esters improves the sensitivity and reliability of detecting testosterone and dihydrotestosterone in saliva.
June 2026 in “British Journal of Dermatology” Finasteride mildly affects semen but is reversible; dutasteride has stronger effects with incomplete recovery.