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Glossary testes

male gonads producing sperm and testosterone

The testes, also known as testicles, are the male gonads responsible for producing sperm and the hormone testosterone. They are located in the scrotum, a pouch of skin below the penis, and play a crucial role in male fertility and secondary sexual characteristics such as muscle mass and body hair.

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Research

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Exogenous Testosterone Alone or with Finasteride Increases Physical Performance, Grip Strength, and Lean Body Mass in Older Men with Low Serum Testosterone

research Exogenous Testosterone (T) Alone or with Finasteride Increases Physical Performance, Grip Strength, and Lean Body Mass in Older Men with Low Serum T

506 citations , March 2005 in “The Journal of Clinical Endocrinology and Metabolism”

This study found that testosterone therapy improved physical performance and strength in older men with low testosterone over 36 months, whether administered alone or with finasteride.

research Exogenous Testosterone or Testosterone with Finasteride Increases Bone Mineral Density in Older Men with Low Serum Testosterone

417 citations , February 2004 in “The Journal of Clinical Endocrinology and Metabolism”

This study found that testosterone therapy increased bone mineral density in older men with low testosterone, and combining it with finasteride may reduce prostate enlargement associated with testosterone treatment.

research Bioavailability of Albumin-Bound Testosterone†

255 citations , October 1985 in “The Journal of Clinical Endocrinology & Metabolism”

This study concluded that albumin-bound testosterone is biologically important and significantly contributes to testosterone bioavailability in women receiving spironolactone.

research Testosterone levels in healthy men and the relation to behavioural and physical characteristics: facts and constructs

229 citations , March 2001 in “European journal of endocrinology”

This review discusses the complex relationship between testosterone levels and male appearance and behavior, emphasizing the limitations and potential biases in making generalizations from current data.

research On the effects of testosterone on brain behavioral functions

186 citations , February 2015 in “Frontiers in Neuroscience”

This review discusses the complex effects of testosterone on the brain, emphasizing sex differences, and reports no clinical results; the authors highlight the inconsistencies in current study findings.

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Community Join

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community Testosterone increased after six months of finasteride

12 upvotes 3 months ago

A 23-year-old male experienced an increase in testosterone levels after taking 1 mg of finasteride daily for six months, with no significant side effects reported. Users discussed how finasteride inhibits DHT, leading to increased testosterone, and debated the psychological versus physiological effects of the medication.

community Testicular ultrasound is it necessary to do?

4 months ago

A 25-year-old male experienced increased testosterone and estradiol levels after starting finasteride for hair loss, leading his doctor to suggest a testicular ultrasound as a precaution. The user questions the necessity of the ultrasound, considering it potentially excessive, while others suggest it could be a useful precaution to rule out any issues.

community Can testosterone alone cause hair loss even after nuking DHT?

in Research/Science 26 upvotes 7 months ago

Testosterone can still cause hair loss even when DHT is blocked by dutasteride, especially if hair follicles are sensitive. Topical treatments like RU58841 or pyrilutamide may help, but their long-term effectiveness is uncertain compared to dutasteride.

community Testing recommendations from lack of min/fin success

1 upvotes 8 months ago

The user has been using minoxidil, finasteride, a laser cap, and ketoconazole shampoo for hair loss without success and is seeking advice on further tests or treatments. They have a family history of hair loss and have not yet undergone dermatologist or trichology tests.

community Testosterone and Estradiol levels on 1 mg/day dutasteride

43 upvotes 11 months ago

A 30-year-old man experienced significant hair regrowth and improved libido after using finasteride and dutasteride for androgenetic alopecia, with no adverse effects. He plans to reduce dutasteride dosage when trying to conceive and has been using topical minoxidil since 2015.

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Learn

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learn Bicalutamide

Could bicalutamide help trans women regrow hair lost to testosterone? No study has tested bicalutamide for hair regrowth in trans women. In cisgender women the only randomized trial found it added nothing to minoxidil, and it is an off-label prescription drug that requires liver monitoring.

learn Scalp Micropigmentation

Are the pigments used in scalp micropigmentation safe? Providers describe SMP pigments as safe, medical-grade and made for the scalp, but those are supplier and clinic descriptions rather than regulatory approvals: no colour additive is approved for injection into the skin, and allergic reactions to tattoo pigment are documented.

learn Hair Transplant

What is an FUE hair transplant? FUE hair transplant extracts individual hair follicles for a minimally invasive, natural-looking result.

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Clinics

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Experts

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67
Hair Loss Specialist
Dr. Fernando Testi, MD
Benissa, Comunitat Valenciana, Spain

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Dr. Fernando Testi, MD