Have you heard that testosterone levels seem to be dropping?
It’s true, but there’s no need to panic. Let’s separate fact from fiction and explore the nuance!
Some have used this as an opportunity to spread fear, conspiracy theories, and to push unproven products and practices.
Sources
- A population-level decline in serum testosterone levels in American men | The Journal of Clinical Endocrinology and Metabolism | January 2007
- Secular Decline in Male Testosterone and Sex Hormone Binding Globulin Serum Levels in Danish Population Surveys | The Journal of Clinical Endocrinology & Metabolism | December 2007
- Decline in Serum Testosterone Levels Among Adolescent and Young Adult Men in the USA | European Urology Focus | July 2021
- A cohort effect on serum testosterone levels in Finnish men | European Journal of Endocrinology | February 2013
- Secular trends in testosterone – findings from a large state-mandate care provider | Reproductive Biology and Endocrinology | March 9, 2020
- Table 2 Previous studies on secular trends in serum testosterone in men, Secular trends in testosterone- findings from a large state-mandate care provider | Reproductive Biology and Endocrinology | March 9, 2020
- Trends in Testosterone Replacement Therapy Use from 2003 to 2013 among Reproductive-Age Men in the United States | The Journal of Urology | April 2017
- Low Testosterone In Men: Symptoms, Causes, And Treatment | Canadian Men’s Health Foundation | September 2023
- Testosterone use and male infertility patient education fact sheet | American Society for Reproductive Medicine | 2021
- The Relative Contributions of Aging, Health, and Lifestyle Factors to Serum Testosterone Decline in Men | The Journal of Clinical Endocrinology & Metabolism | February 1, 2007
- Assays of Serum Testosterone | Urologic Clinics of North America | May 2016
- Decline in Serum Testosterone Levels Among Adolescent and Young Adult Men in the USA | European Urology Focus | July 2021
- Estimating age-specific trends in circulating testosterone and sex hormone-binding globulin in males and females across the lifespan | Annals of Clinical Biochemistry: International Journal of Laboratory Medicine | October 2015
- Testosterone deficiency and the aging male | International Journal of Impotence Research | April 2022
- The epidemiology of obesity | Metabolism | March 2019
- Obesity epidemiology trends by race/ethnicity, gender, and education: National Health Interview Survey, 1997–2012 | Gastroenterology Clinics of North America | December 2016
- Obesity: global epidemiology and pathogenesis | Nature Reviews Endocrinology | February 2019
- Epidemiology of diabetes | Medicine | January 2019
- The worldwide epidemiology of type 2 diabetes mellitus—present and future perspectives | Nature Reviews Endocrinology | November 2011
- Recent worldwide sleep patterns and problems during adolescence: A review and meta-analysis of age, region, and sleep | Sleep Medicine | February 2011
- Sleep Problems: An Emerging Global Epidemic? Findings From the INDEPTH WHO-SAGE Study Among More Than 40,000 Older Adults From 8 Countries Across Africa and Asia | Sleep | August 2012
- Sleep: a neglected public health issue | The Lancet Diabetes & Endocrinology | June 2024
- Effect of 1 Week of Sleep Restriction on Testosterone Levels in Young Healthy Men | JAMA | June 2011
- Gen Z adults and younger millennials are “completely overwhelmed” by stress | American Psychological Association | November 2023
- World Unhappier, More Stressed Out Than Ever | Gallup | June 2022
- American Adults Express Increasing Anxiousness in Annual Poll; Stress and Sleep are Key Factors Impacting Mental Health | American Psychiatric Association | May 2024
- Charting Adult Development Through (Historically Changing) Daily Stress Processes | American Psychological Association | 2020
- Worldwide trends in insufficient physical activity from 2001 to 2016: a pooled analysis of 358 population-based surveys with 1·9 million participants – The Lancet Global Health | October 2018
- Nearly 1.8 billion adults at risk of disease from not doing enough physical activity | World Health Organization | June 2024
- Trends over 5 Decades in U.S. Occupation-Related Physical Activity and Their Associations with Obesity | PLoS One | May 2011
- Recent Trends in Sedentary Time: A Systematic Literature Review | Healthcare | July 2021
- New global guidelines on sedentary behaviour and health for adults: broadening the behavioural targets | International Journal of Behavioral Nutrition and Physical Activity | November 2020
- Low Testosterone In Men: Symptoms, Causes, And Treatment | Canadian Men’s Health Foundation | September 2023
- Canadian Urological Association guideline on testosterone deficiency in men: Evidence-based Q&A | Canadian Urological Association Journal | February 2021
- Testosterone-Associated Dietary Pattern Predicts Low Testosterone Levels and Hypogonadism | Nutrients | November 2018
- Dietary trends and the decline in male reproductive health | Hormones | February 2023
- Frontiers | Exposure to Endocrine Disrupting Chemicals and Male Reproductive Health | Frontiers Public Health | June 2014
- Increasing use of prescription drugs in the United Kingdom | Pharmacoepidemiology and Drug Safety | December 2015
- National trends in long-term use of prescription opioids | Pharmacoepidemiology and Drug Safety | September 2017
- The Relative Contributions of Aging, Health, and Lifestyle Factors to Serum Testosterone Decline in Men | The Journal of Clinical Endocrinology & Metabolism | February 2007
- Changes in Testosterone, Cortisol, and Estradiol Levels in Men Becoming Fathers | Mayo Clinic Proceedings | June 2001
- Testosterone Deficiency Guideline | American Urological Association | 2018
- What Is a Normal Testosterone Level for Young Men? Rethinking the 300 ng/dL Cutoff for Testosterone Deficiency in Men 20-44 Years Old | The Journal of Urology | December 2022
- Testosterone levels show steady decrease among young US men | Urology Times Journal | July 2020
- Low Testosterone | HealthLink BC | June 2023
- Individual testosterone decline and future mortality risk in men | European Journal of Endocrinology | January 2018
- Low Testosterone in Adolescents & Young Adults | Frontiers in Endocrinology | January 2020
- Injection of testosterone may be safer and more effective than transdermal administration for combating loss of muscle and bone in older men | American Journal of Physiology-Endocrinology and Metabolism | June 2015
- Low Serum Testosterone and Estradiol Predict Mortality in Elderly Men | The Journal of Clinical Endocrinology & Metabolism | July 2009
- Low Serum Testosterone and Mortality in Older Men | The Journal of Clinical Endocrinology & Metabolism | January 2008
- Endogenous Testosterone and Mortality in Men: A Systematic Review and Meta-Analysis | The Journal of Clinical Endocrinology & Metabolism | October 2011
- Serum testosterone, testosterone replacement therapy and all-cause mortality in men with type 2 diabetes: retrospective consideration of the impact of PDE5 inhibitors and statins | International Journal of Clinical Practice | February 2016
- Alternatives to Testosterone Therapy: A Review | Sexual Medicine Reviews | January 2018
- Relative Contributions of Aging, Health, and Lifestyle Factors to Serum Testosterone Decline in Men | The Journal of Clinical Endocrinology & Metabolism | February 2007
- Relationship between testosterone serum levels and lifestyle in aging men | The Aging Male | July 2009
- Lifestyle strategies to help prevent natural age-related decline in testosterone | Harvard Health Publishing | August 2024
- Lifestyle modification increases serum testosterone level and decrease central blood pressure in overweight and obese men | Endocrine Journal | 2015
- Effect of 1 Week of Sleep Restriction on Testosterone Levels in Young Healthy Men | JAMA | 2011
- Increased physical activity has a greater effect than reduced energy intake on lifestyle modification-induced increases in testosterone | Journal of Clinical Biochemistry and Nutrition | November 2015
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