Restoring testosterone to physiological levels in individuals diagnosed with hypogonadism (clinically low testosterone) can lead to several documented health improvements. The following list outlines 20 potential benefits supported by clinical research.
1. Improved Sexual Desire (Libido)
Reference: Bassil, N., et al. (2009). The benefits and risks of testosterone replacement therapy. Journal of Clinical Endocrinology & Metabolism.
pmc.ncbi.nlm.nih.gov (opens in new tab)
2. Enhanced Erectile Function
Reference: Petering, R. C., & Brooks, N. A. (2017). Testosterone Therapy: Review of Clinical Applications. American Family Physician.
aafp.org (opens in new tab)
3. Increased Muscle Mass
Reference: Heidelbaugh, J. J. (2024). Testosterone Replacement Therapy for Male Hypogonadism. PubMed.
pubmed.ncbi.nlm.nih.gov (opens in new tab)
4. Decreased Fat Mass
Reference: University of Utah Health. (n.d.). Hypogonadism Treatment: Testosterone Replacement Therapy.
healthcare.utah.edu (opens in new tab)
5. Increased Bone Mineral Density
Reference: Heidelbaugh, J. J. (2024). Testosterone Replacement Therapy for Male Hypogonadism. PubMed.
pubmed.ncbi.nlm.nih.gov (opens in new tab)
6. Reduced Risk of Fractures
Reference: University of Utah Health. (n.d.). Hypogonadism Treatment: Testosterone Replacement Therapy.
healthcare.utah.edu (opens in new tab)
7. Improved Mood Stabilization
Reference: Bassil, N., et al. (2009). The benefits and risks of testosterone replacement therapy. Journal of Clinical Endocrinology & Metabolism.
pmc.ncbi.nlm.nih.gov (opens in new tab)
8. Reduced Depressive Symptoms
Reference: Heidelbaugh, J. J. (2024). Testosterone Replacement Therapy for Male Hypogonadism. PubMed.
pubmed.ncbi.nlm.nih.gov (opens in new tab)
9. Increased Energy Levels
Reference: The New England Journal of Medicine. (n.d.). Testosterone Treatment for Hypogonadism: Benefits, Risks.
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10. Reduced Fatigue
Reference: University of Utah Health. (n.d.). Hypogonadism Treatment: Testosterone Replacement Therapy.
healthcare.utah.edu (opens in new tab)
11. Improved Cognitive Function
Reference: European Society of Medicine. (n.d.). Testosterone Therapy: Essential for Women’s Health.
esmed.org (opens in new tab)
12. Improved Quality of Life
Reference: Cleveland Clinic. (n.d.). Testosterone Replacement Therapy (TRT): What It Is.
my.clevelandclinic.org (opens in new tab)
13. Correction of Anemia
Reference: The New England Journal of Medicine. (n.d.). Testosterone Treatment for Hypogonadism: Benefits, Risks.
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14. Improved Muscle Strength
Reference: Heidelbaugh, J. J. (2024). Testosterone Replacement Therapy for Male Hypogonadism. PubMed.
pubmed.ncbi.nlm.nih.gov (opens in new tab)
15. Improved Physical Performance
Reference: University of Utah Health. (n.d.). Hypogonadism Treatment: Testosterone Replacement Therapy.
healthcare.utah.edu (opens in new tab)
16. Improved Insulin Sensitivity
Reference: Humanaut Health. (n.d.). Benefits of TRT for Men: Energy, Libido, and Muscle Growth.
humanauthealth.com (opens in new tab)
17. Improved Lipid Profile
Reference: Humanaut Health. (n.d.). Benefits of TRT for Men: Energy, Libido, and Muscle Growth.
humanauthealth.com (opens in new tab)
18. Improved Vascular Health
Reference: European Society of Medicine. (n.d.). Testosterone Therapy: Essential for Women’s Health.
esmed.org (opens in new tab)
19. Improved Sleep Quality
Reference: Humanaut Health. (n.d.). Benefits of TRT for Men: Energy, Libido, and Muscle Growth.
humanauthealth.com (opens in new tab)
20. Normalized Body Composition (Muscle-to-Fat Ratio)
Reference: University of Utah Health. (n.d.). Hypogonadism Treatment: Testosterone Replacement Therapy.
healthcare.utah.edu (opens in new tab)
Disclaimer: Testosterone therapy carries potential risks and is not indicated for everyone. Clinical intervention should only be pursued under the direct supervision of a healthcare provider following a confirmed diagnosis of hypogonadism through appropriate blood testing.
I Am a Doctor
Below are 20 clinically documented benefits that may occur when testosterone is restored to physiological levels in adults with confirmed hypogonadism (low testosterone). Effects vary by individual, dose, formulation, and duration; most benefits are modest-to-moderate and strongest in sexual function, body composition, bone density, and correction of anemia.
1. Increased Sexual Desire (Libido)
Snyder PJ et al. Effects of Testosterone Treatment in Older Men. New England Journal of Medicine. 2016;374:611-624.
https://www.nejm.org/doi/full/10.1056/NEJMoa1506119 (opens in new tab)
2. Improved Erectile Function (Modest)
Snyder PJ et al. Effects of Testosterone Treatment in Older Men. New England Journal of Medicine. 2016;374:611-624.
https://www.nejm.org/doi/full/10.1056/NEJMoa1506119 (opens in new tab)
3. Increased Sexual Activity/Frequency
Snyder PJ et al. Effects of Testosterone Treatment in Older Men. New England Journal of Medicine. 2016;374:611-624.
https://www.nejm.org/doi/full/10.1056/NEJMoa1506119 (opens in new tab)
4. Increased Lean Body Mass
Isidori AM et al. Effects of testosterone on body composition, muscle strength and sexual function in men: a meta-analysis. Clinical Endocrinology (Oxf). 2005;63:280-293.
https://pubmed.ncbi.nlm.nih.gov/16117815/ (opens in new tab)
5. Decreased Fat Mass
Isidori AM et al. Clinical Endocrinology (Oxf). 2005;63:280-293.
https://pubmed.ncbi.nlm.nih.gov/16117815/ (opens in new tab)
6. Increased Muscle Strength (Modest, e.g., Leg Press, Handgrip)
Snyder PJ et al. Effects of Testosterone Treatment in Older Men. New England Journal of Medicine. 2016;374:611-624.
https://www.nejm.org/doi/full/10.1056/NEJMoa1506119 (opens in new tab)
7. Improved Physical Function in Those With Baseline Limitations (e.g., Stair-Climb Power; Subgroup Effects)
Snyder PJ et al. Effects of Testosterone Treatment in Older Men. New England Journal of Medicine. 2016;374:611-624.
https://www.nejm.org/doi/full/10.1056/NEJMoa1506119 (opens in new tab)
8. Increased Lumbar Spine Bone Mineral Density
Snyder PJ et al. Effects of Testosterone Treatment on Bone Mineral Density and Strength in Older Men. JAMA. 2017;317(7):708-716.
https://jamanetwork.com/journals/jama/fullarticle/2603937 (opens in new tab)
9. Increased Hip Bone Mineral Density
Snyder PJ et al. JAMA. 2017;317(7):708-716.
https://jamanetwork.com/journals/jama/fullarticle/2603937 (opens in new tab)
10. Increased Estimated Bone Strength by Finite Element Analysis
Snyder PJ et al. JAMA. 2017;317(7):708-716.
https://jamanetwork.com/journals/jama/fullarticle/2603937 (opens in new tab)
11. Reduced Bone Resorption Markers (Favorable Bone Turnover Profile)
Snyder PJ et al. JAMA. 2017;317(7):708-716.
https://jamanetwork.com/journals/jama/fullarticle/2603937 (opens in new tab)
12. Correction of Unexplained Anemia in Hypogonadal Men
Roy CN et al. Effect of Testosterone Treatment on Hemoglobin in Older Men with Low Testosterone and Anemia. New England Journal of Medicine. 2017;376:611-622.
https://www.nejm.org/doi/full/10.1056/NEJMoa1613647 (opens in new tab)
13. Increased Hemoglobin/Hematocrit (Beneficial in True Anemia; Monitor for Erythrocytosis)
Roy CN et al. New England Journal of Medicine. 2017;376:611-622.
https://www.nejm.org/doi/full/10.1056/NEJMoa1613647 (opens in new tab)
14. Improved Mood
Snyder PJ et al. Effects of Testosterone Treatment in Older Men. New England Journal of Medicine. 2016;374:611-624.
https://www.nejm.org/doi/full/10.1056/NEJMoa1506119 (opens in new tab)
15. Reduction in Depressive Symptoms (Small-to-Moderate Effect Sizes in Meta-Analysis)
Walther A et al. Association of Testosterone Treatment With Alleviation of Depressive Symptoms in Men: A Systematic Review and Meta-analysis. JAMA Psychiatry. 2019;76(1):31-40.
https://jamanetwork.com/journals/jamapsychiatry/fullarticle/2706178 (opens in new tab)
16. Improved Sexual Satisfaction/Pleasure
Snyder PJ et al. Effects of Testosterone Treatment in Older Men. New England Journal of Medicine. 2016;374:611-624.
https://www.nejm.org/doi/full/10.1056/NEJMoa1506119 (opens in new tab)
17. Improved Vitality/Energy Measures (Modest; Varies by Scale and Baseline Symptoms)
Snyder PJ et al. Effects of Testosterone Treatment in Older Men. New England Journal of Medicine. 2016;374:611-624.
https://www.nejm.org/doi/full/10.1056/NEJMoa1506119 (opens in new tab)
18. Improved Insulin Resistance Measures in Hypogonadal Men With Metabolic Syndrome/Type 2 Diabetes (Heterogeneous but Favorable in Meta-Analyses)
Cai X et al. Effects of Testosterone Replacement Therapy on Metabolic Profiles in Hypogonadal Men: A Meta-Analysis of RCTs. BMC Medicine. 2014;12:108.
https://bmcmedicine.biomedcentral.com/articles/10.1186/1741-7015-12-108 (opens in new tab)
19. Reduced Waist Circumference/Central Adiposity
Cai X et al. BMC Medicine. 2014;12:108.
https://bmcmedicine.biomedcentral.com/articles/10.1186/1741-7015-12-108 (opens in new tab)
20. Improved Overall Sexual Quality-of-Life Domains in Symptomatic Hypogonadism
Bhasin S et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. Journal of Clinical Endocrinology & Metabolism. 2018;103(5):1715-1744.
https://academic.oup.com/jcem/article/103/5/1715/4939465 (opens in new tab)
Notes for Clinical Context
- Evidence is strongest for sexual function, anemia correction, bone density/strength, and body composition changes. Improvements in physical function, vitality, mood, metabolic parameters, and QoL are generally modest and more likely in men with greater baseline deficits.
- Cardiovascular safety: Large contemporary data (e.g., TRAVERSE) support non-inferiority for major adverse cardiovascular events in appropriately selected men on monitored therapy; this is a safety finding rather than a “benefit.”
Nissen SE et al. Cardiovascular Safety of Testosterone-Replacement Therapy. New England Journal of Medicine. 2023;389:107-117.
https://www.nejm.org/doi/full/10.1056/NEJMoa2301761 (opens in new tab)
- Monitor for adverse effects (erythrocytosis, edema, acne, infertility, potential worsening of untreated severe OSA, prostate-related monitoring as per guidelines).
Practice guidelines: Bhasin S et al. Endocrine Society CPG, 2018.
https://academic.oup.com/jcem/article/103/5/1715/4939465 (opens in new tab)
Mulhall JP et al. Evaluation and Management of Testosterone Deficiency (AUA Guideline). Journal of Urology. 2018;200(2):423-432.
https://www.auajournals.org/doi/10.1016/j.juro.2018.03.115 (opens in new tab)