Higher free testosterone levels can increase bone density and decrease body fat but may raise the risk of prostate cancer, hair loss, and benign prostate enlargement.
July 2021 in “British Journal of Dermatology” Low testosterone levels may contribute to female pattern hair loss in men.
40 citations,
March 1982 in “British Journal of Dermatology” Young women with diffuse hair loss may have low SHBG levels, which could lead to more active testosterone and contribute to their hair loss.
29 citations,
September 1983 in “British Journal of Dermatology” Men with hair loss have lower SHBG and higher saliva testosterone levels, suggesting increased androgen activity.
29 citations,
October 2020 in “eLife” Higher testosterone levels can increase the risk of certain diseases like type 2 diabetes in women and prostate cancer in men, but can also protect against autoimmune diseases and hair loss. It also affects body fat and bone density.
9 citations,
January 2007 in “Journal of dermatological treatment” Testosterone gel helps increase facial hair in young men with beta-thalassemia major.
2 citations,
January 2018 in “Biology and medicine” High testosterone levels in 20% of the women studied may indicate PCOS, while 80% had low levels with potential health impacts.
December 2018 in “Journal of Advances in VetBio Science and Techniques” Low testosterone might be a common cause of hair loss in male dogs.
1 citations,
April 2016 in “Journal of Investigative Dermatology” Prostaglandin D2 increases testosterone levels in skin cells through reactive oxygen species, not enzymes, which could lead to new hair loss treatments.
March 2017 in “Journal of Dermatology” Different hair loss patterns may be linked to varying male hormone levels.
142 citations,
February 1985 in “Fertility and sterility” Spironolactone reduced hair thickness and some testosterone levels in women with excessive hair growth.
6 citations,
May 2016 in “Urolithiasis” Balding and low testosterone increase risk of urinary stones.
Women with androgenetic alopecia (hair loss) have normal prostate specific antigen levels but higher testosterone levels.
10 citations,
October 2010 in “International Journal of Andrology” Finasteride doesn't affect oral testosterone undecanoate, and high DHT levels may cause acne, prostate issues, and hair loss.
1 citations,
January 2020 in “Egyptian Journal of Dermatology and Venereology” Higher testosterone and DHT levels are linked to hair loss in men, but not to prostate cancer risk.
April 2019 in “Journal of the Endocrine Society” A young patient with unusual insulin resistance and high testosterone levels had a rare INSR gene mutation.
May 2013 in “Journal of the Egyptian Women's Dermatologic Society (Print)” High aldosterone and free testosterone levels link to female hair loss; testing aldosterone may predict hypertension risk.
23 citations,
January 2016 in “Transgender health” Hormone therapy with estradiol and spironolactone can regrow scalp hair in transgender women by lowering testosterone to female levels.
29 citations,
May 1975 in “Clinical Endocrinology” Combination therapy significantly reduces testosterone and moderately reduces hair growth in women with hirsutism.
Hair and nails can show hormone changes during puberty in dogs.
14 citations,
July 2011 in “Experimental Dermatology” Applying EGCG on the skin can prevent hair loss caused by testosterone in mice.
7 citations,
October 2017 in “The Prostate” Baldness in men with prostate cancer is linked to higher levels of certain sex hormones, but chest hair density is not.
3 citations,
January 1988 in “PubMed” High prolactin levels can cause skin and hair symptoms similar to those caused by hormone imbalances.
September 2023 in “Clinical, Cosmetic and Investigational Dermatology” Higher SHBG levels are linked to less severe hair loss in women, but vitamin D levels don't seem to affect hair loss.
May 2023 in “Animal Reproduction Update” High levels of cortisol in hair show long-term stress which can lower fertility in animals.
65 citations,
October 1999 in “Journal of The American Academy of Dermatology” Finasteride effectively reduces hair loss by decreasing androgen levels.
October 2023 in “Journal of Preventive Diagnostic and Treatment Strategies in Medicine” Low ferritin and Vitamin D levels may cause hair loss after COVID-19.
January 2023 in “International journal of clinical medicine” Women with PCOS and hair loss have lower levels of the protein gelsolin in their blood.
32 citations,
January 1990 in “Clinical Endocrinology” Women with female pattern hair loss have higher levels of certain androgens, suggesting increased androgen exposure to hair follicles.
10 citations,
November 2012 in “The journal of investigative dermatology/Journal of investigative dermatology” Korean and Caucasian men with male pattern baldness have different hair steroid levels.