Low testosterone · Telehealth for men · Canada & USA
Is my low testosterone from aging, or from weight, sleep and stress?
Usually a mix, and part of the mix is changeable. Age brings a gradual average decline, about 1.6 percent a year in the Massachusetts Male Aging Study. Extra weight, short sleep and sustained stress can pull testosterone lower on top of that, and those are the parts you can work on. Two morning labs that include LH help show which pattern you have. We go through your results with you and build a plan around sleep, stress, training, nutrition and targeted support.
Part of our low testosterone and andropause guide for men in Canada and the USA.
What aging does to testosterone
Testosterone drifts down as men age, gradually and unevenly. In the Massachusetts Male Aging Study (1,156 men followed 7 to 10 years from ages 40 to 70), total testosterone fell about 1.6 percent a year and bioavailable testosterone 2 to 3 percent a year, and the authors suggested that new health problems may speed the decline. The Baltimore Longitudinal Study of Aging found an average drop of 0.124 nmol/L a year in 890 healthy men; by total testosterone criteria about one in five men over 60, three in ten over 70 and half over 80 had hypogonadal values. In the European Male Ageing Study, the average yearly change over about four years was only around 0.1 nmol/L.
A slow average slope
Age alone moves the average a small amount each year, so a big gap from your twenties often has other contributors.
The testes slow down
In the European Male Ageing Study, age was linked to lower free testosterone with raised LH, a sign of the testes themselves working less.
Good health adds a cushion
In the Massachusetts study, men in apparent good health (no chronic illness, prescriptions, obesity or heavy drinking) had 10 to 15 percent higher levels of several androgens.
Age is the backdrop, not the verdict
Sleep, weight, stress and training still move your numbers at 45 or 65, and that is where we start.
What extra weight does
In the European Male Ageing Study (3,200 men aged 40 to 79), men with a BMI of 30 or more had total testosterone about 5.1 nmol/L lower than men under BMI 25, and men with a BMI of 25 to 30 were about 2.3 nmol/L lower, with LH unchanged or lower, which points to the brain’s signal rather than the testes. Obesity also lowers SHBG: in a US cohort of 3,671 men tested for low testosterone, obese men averaged 10.5 versus 14.1 nmol/L total testosterone, while calculated free testosterone did not differ. A review in the Asian Journal of Andrology describes obesity-linked low testosterone as functional and non-permanent, and it can be reversible.
Total versus free
Lower SHBG pulls total testosterone down first, so total and free testosterone can tell different stories. We read both with SHBG.
A quieter brain signal
With higher BMI, LH tended to stay unchanged or fall, so we check LH to see whether the signal is turned down.
A two-way street
Low testosterone also tends to add body fat, which can feed the cycle. Breaking it at the weight, sleep or training end can help.
What we do with it
We review SHBG, free testosterone, LH and metabolic markers together, then map the weight-related pieces of your picture.
Does losing weight bring testosterone back?
Often it raises it. A meta-analysis of 24 studies (Corona and colleagues, 2013) found that total testosterone rose by about 2.9 nmol/L on average after low-calorie diets and about 8.7 nmol/L after bariatric surgery, with bigger rises in men who lost more weight, were younger and did not have diabetes. In the European Male Ageing Study follow-up, weight loss tracked with a proportional rise in testosterone and weight gain with a proportional fall; free testosterone moved significantly in men who gained or lost 15 percent or more of their weight. The AUA guideline recommends counselling every man with low testosterone on weight loss and activity, and the Canadian guideline adds that resistance training gives relatively modest rises.
A nutrition plan that fits you
Protein, fiber and meal timing built around your work, your family and the foods you enjoy.
Strength work you can keep
Resistance training sessions set to your level, with simple progressions we track together.
Re-check your labs
Repeat testosterone, SHBG and LH after real change, so you see what moved.
Steady check-ins
Regular follow-up keeps small wins adding up through busy weeks.
What short sleep does
In a University of Chicago study (Leproult and Van Cauter, JAMA 2011), 10 healthy men averaging 24 years old spent about a week on five-hour bedtimes. Their daytime testosterone averaged 16.5 nmol/L, against 18.4 nmol/L after rested nights, and 15.5 against 17.9 nmol/L between 2 and 10 PM. Their vigor scores fell from 28 to 19 over the week. The Canadian Urological Association guideline sums up persistent sleep restriction as lowering testosterone by roughly 10 to 15 percent and says a structured sleep program may offset it. The JAMA report also notes that sleep fragmentation and obstructive sleep apnea are linked with lower testosterone.
A steady schedule
Fixed bed and wake times, adjusted to your real week, are the base of every sleep plan we write.
Light and timing
Morning light, evening light and caffeine timing arranged around when you actually sleep.
A wind-down you will use
A short evening routine that fits your home, built one habit at a time.
Night and rotating shifts
Working nights? Our shift work page covers sleep and recovery on rotating schedules.
Stress, fueling and the brain’s signal
A 2026 review in the Journal of Clinical Endocrinology & Metabolism (Friedl, Nindl and Potter) pulled together military field studies, endurance athletes and competition models. It concludes that testosterone suppression under sustained stress is commonly a centrally driven, reversible adaptation rather than testicular failure: severe energy deficit, sleep disruption and uncontrollable psychological stress turn down the hypothalamic signals that drive LH, and often raise SHBG, which lowers free testosterone disproportionately. The same review found that heavy resistance training did not suppress baseline testosterone when energy intake was sufficient.
Fuel your training
Eating enough for your workload keeps energy availability up, the factor the review points to.
Recovery built in
Rest days, easy days and sleep placed on the calendar like any other appointment.
Stress tools you will use
Short breathing, walking and planning habits matched to your day, not a generic list.
Check-ins that keep it light
Regular conversations to adjust the plan before pressure builds.
How to tell which pattern you have
The AUA guideline defines low testosterone as total testosterone under 300 ng/dL on two early-morning measurements, together with symptoms, and recommends measuring LH in every man with a low result (strong recommendation). In the European Male Ageing Study (3,369 men aged 40 to 79), researchers sorted men by LH: low testosterone with low or normal LH (the secondary pattern) in 11.8 percent, low testosterone with high LH (the primary pattern) in 2.0 percent, and normal testosterone with raised LH (compensated) in 9.5 percent. Older age was linked to the primary and compensated patterns, and a BMI of 30 or more was strongly linked to the secondary pattern.
Low T with high LH
Often the testes-led pattern seen more with age. We map what supports your levels and the options worth reviewing.
Low T with low or normal LH
The signal looks turned down, which is where weight, sleep, stress and training changes have the most to offer.
Normal T with raised LH
Called compensated in the study, and seen with age. We track it over time.
Your numbers in context
SHBG, free testosterone and metabolic markers round out the picture. See the full lab list.
How we help you find out and act
Odin Health Labs is telehealth for men in Canada and the USA with low testosterone symptoms. Treatment trials such as TRAVERSE (5,246 men aged 45 to 80 with symptoms and two fasting readings under 300 ng/dL) enrolled men with confirmed low levels, and in T4DM every man joined a structured lifestyle program. Whatever route you choose, the lifestyle work runs alongside it. Here is how we work with you.
- Step 1
Review your labs and history
We go through total and free testosterone, SHBG, LH and metabolic markers with you, along with your weight, sleep and stress patterns.
- Step 2
Find your biggest levers
We rank what is most likely moving your numbers: weight, sleep, stress, training or fueling.
- Step 3
Build your plan
A plan around sleep, stress, training, nutrition and targeted support, broken into simple weekly actions.
- Step 4
Follow up and re-check
Repeat labs and regular check-ins show what is shifting, and we adjust your plan with you.
Sources
- Feldman HA, Longcope C, Derby CA, et al. Age trends in the level of serum testosterone and other hormones in middle-aged men: longitudinal results from the Massachusetts Male Aging Study. J Clin Endocrinol Metab 2002;87(2):589-598. doi.org/10.1210/jcem.87.2.8201
- Harman SM, Metter EJ, Tobin JD, Pearson J, Blackman MR. Longitudinal effects of aging on serum total and free testosterone levels in healthy men (Baltimore Longitudinal Study of Aging). J Clin Endocrinol Metab 2001;86(2):724-731. doi.org/10.1210/jcem.86.2.7219
- Wu FC, Tajar A, Pye SR, et al. Hypothalamic-pituitary-testicular axis disruptions in older men are differentially linked to age and modifiable risk factors: the European Male Aging Study. J Clin Endocrinol Metab 2008;93(7):2737-2745. doi.org/10.1210/jc.2007-1972
- Tajar A, Forti G, O’Neill TW, et al. Characteristics of secondary, primary, and compensated hypogonadism in aging men: evidence from the European Male Ageing Study. J Clin Endocrinol Metab 2010;95(4):1810-1818. doi.org/10.1210/jc.2009-1796
- Camacho EM, Huhtaniemi IT, O’Neill TW, et al. Age-associated changes in hypothalamic-pituitary-testicular function in middle-aged and older men are modified by weight change and lifestyle factors: longitudinal results from the European Male Ageing Study. Eur J Endocrinol 2013;168(3):445-455. doi.org/10.1530/EJE-12-0890
- Corona G, Rastrelli G, Monami M, et al. Body weight loss reverts obesity-associated hypogonadotropic hypogonadism: a systematic review and meta-analysis. Eur J Endocrinol 2013;168(6):829-843. doi.org/10.1530/EJE-12-0955
- Cooper LA, Page ST, Amory JK, Anawalt BD, Matsumoto AM. The association of obesity with sex hormone-binding globulin is stronger than the association with ageing. Clin Endocrinol 2015;83(6):828-833. doi.org/10.1111/cen.12768
- Fui MN, Dupuis P, Grossmann M. Lowered testosterone in male obesity: mechanisms, morbidity and management. Asian J Androl 2014;16(2):223-231. doi.org/10.4103/1008-682X.122365
- Leproult R, Van Cauter E. Research letter on a week of sleep restriction and testosterone levels in young healthy men. JAMA 2011;305(21):2173-2174. doi.org/10.1001/jama.2011.710
- Friedl KE, Nindl BC, Potter AW. Stress-associated testosterone suppression: central adaptation or hypogonadism? J Clin Endocrinol Metab 2026;111(8):e1951-e1960. doi.org/10.1210/clinem/dgag181
- Mulhall JP, Trost LW, Brannigan RE, et al. Evaluation and management of testosterone deficiency: AUA guideline. J Urol 2018;200(2):423-432. doi.org/10.1016/j.juro.2018.03.115
- Grober ED, Krakowsky Y, Khera M, et al. Canadian Urological Association guideline on testosterone deficiency in men: evidence-based Q&A. Can Urol Assoc J 2021;15(5). doi.org/10.5489/cuaj.7252
- Lincoff AM, Bhasin S, Flevaris P, et al. Cardiovascular safety of testosterone-replacement therapy (TRAVERSE). N Engl J Med 2023;389:107-117. doi.org/10.1056/NEJMoa2215025
- Wittert G, Bracken K, Robledo KP, et al. Testosterone treatment to prevent or revert type 2 diabetes in men enrolled in a lifestyle programme (T4DM). Lancet Diabetes Endocrinol 2021;9(1):32-45. doi.org/10.1016/S2213-8587(20)30367-3
Frequently asked questions
Does testosterone naturally drop with age?
On average, yes, but slowly. In the Massachusetts Male Aging Study, total testosterone fell about 1.6 percent a year in men followed for 7 to 10 years from ages 40 to 70, and bioavailable testosterone fell 2 to 3 percent a year. The Baltimore Longitudinal Study of Aging measured an average drop of 0.124 nmol/L a year in 890 healthy men. Declines differ a lot from man to man, and in the Massachusetts study the authors suggested that new health problems may speed the fall. We look at your numbers and your habits together, so you know how much of your picture is the slow slope of age and how much is something you can change.
Can losing weight raise my testosterone?
Often, yes. A 2013 meta-analysis of 24 studies found that total testosterone rose by about 2.9 nmol/L on average after low-calorie diets and about 8.7 nmol/L after bariatric surgery, with larger rises in men who lost more weight. In the European Male Ageing Study, weight loss tracked with a rise in testosterone and weight gain with a fall. The AUA guideline advises counselling every man with low testosterone on weight loss and physical activity. We build a nutrition and training plan around your life and re-check your labs to see the change.
How much can poor sleep lower testosterone?
In a University of Chicago study of 10 healthy men with an average age of 24, about a week of five-hour bedtimes lowered daytime testosterone from an average of 18.4 to 16.5 nmol/L, with the biggest gap between 2 and 10 PM. The Canadian Urological Association guideline sums up persistent sleep restriction as lowering testosterone by roughly 10 to 15 percent and notes that a structured sleep program may offset it. It is a small study in young men, and it shows the direction of the effect, not your exact number. We set up a sleep plan that fits your schedule, including night and rotating shifts.
Can stress lower testosterone?
Sustained stress can. A 2026 review in the Journal of Clinical Endocrinology & Metabolism pulled together military, endurance-athlete and competition studies and concluded that testosterone suppression under sustained stress is commonly a reversible, brain-driven adaptation rather than testicular failure. Severe energy deficit, disrupted sleep and uncontrollable psychological stress turn down the brain’s LH signal and often raise SHBG, which lowers free testosterone. The same review found that heavy resistance training did not suppress baseline testosterone when energy intake was sufficient. We build stress, recovery and fueling habits you can keep.
Which labs show whether it is age or lifestyle?
The AUA guideline defines low testosterone as total testosterone under 300 ng/dL on two early-morning measurements together with symptoms, and recommends measuring LH in every man with a low result. In the European Male Ageing Study, low testosterone with low or normal LH was far more common (11.8 percent of men) than low testosterone with high LH (2.0 percent), and obesity was strongly linked to the low-or-normal-LH pattern. SHBG and free testosterone add context, because obesity lowers SHBG and total testosterone together. We walk you through each result. See our lab guide.
How does Odin Health Labs work with my doctor?
Odin Health Labs is a telehealth service for men in Canada and the USA with low testosterone (andropause) symptoms. We review your labs with you, work out which levers matter most, build your plan and track your progress. We can share your plan and results with your own doctor if you choose. See our low testosterone overview and our Privacy Policy.
Ready to see which levers move your testosterone?
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