Related Experiment Video
Updated: Jul 12, 2026
11:51
Combining Behavioral Endocrinology and Experimental Economics: Testosterone and Social Decision Making
Published on: March 3, 2011
Marijuana use and serum testosterone concentrations among U.S. males
J E Thistle1, B I Graubard1, M Braunlin1
1Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD, USA.
Andrology
|April 11, 2017
Summary
Recent marijuana use may be linked to higher testosterone levels in men, particularly younger adults. Further research is needed to understand how marijuana use impacts male reproductive health and testosterone.
Area of Science:
- Reproductive Endocrinology
- Men's Health
- Cannabinoid Research
Background:
- Existing research presents conflicting findings on marijuana's effects on male testosterone levels.
- Previous studies have linked marijuana use to both decreased and increased testosterone concentrations.
- Understanding marijuana's impact on the male reproductive system is crucial for public health.
Purpose of the Study:
- To investigate the association between marijuana use and serum testosterone concentrations in U.S. males.
- To analyze the effects of marijuana use frequency, duration, and recency on testosterone levels.
Main Methods:
- Analysis of data from 1577 men from the 2011-2012 U.S. National Health and Nutrition Examination Survey (NHANES).
- Serum testosterone levels measured using isotope dilution liquid chromatography tandem mass spectrometry.
- Multiple linear regression models, weighted by survey weights, were used to examine associations.
Main Results:
- No significant difference in serum testosterone was found between ever-users and never-users of marijuana.
- Serum testosterone showed an inverse association with time since last regular marijuana use (p=0.02).
- This inverse association was stronger in men aged 18-29 years (p<0.01), with higher testosterone in more recent users.
Conclusions:
- Recency of marijuana use, not frequency or duration, demonstrated the strongest relationship with testosterone levels.
- Higher serum testosterone concentrations were observed in men with more recent marijuana use.
- Further studies are required to elucidate the mediating role of testosterone in marijuana's effects on male reproductive outcomes.
Related Concept Videos
01:26Testosterone: Functions and Regulation
The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
01:23Infertility in Males
Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
01:23Drug Concentrations: Measurements
Drug concentration is the quantity of a drug present in a biological sample. Measuring drug amounts in biological samples allows the clinician to understand how a drug is absorbed, distributed, metabolized, and excreted. Samples can be obtained through invasive or non-invasive methods. Invasive techniques involve surgical or parenteral interventions to gather blood, cerebrospinal fluid, or tissue biopsy. Conversely, non-invasive approaches provide samples like urine, feces, and saliva.
Plasma —...
Plasma —...
01:20Disorders of the Male Reproductive System
Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
01:27Hallucinogens and Psychedelics
Hallucinogens are psychoactive substances that profoundly alter perceptual experiences, generating unreal visual and sensory images. Often referred to as psychedelic drugs — a term derived from the Greek words "psyche" (mind) and "delos" (revealing) — these substances include marijuana and lysergic acid diethylamide (LSD), among others. These drugs vary in intensity and effects.
Marijuana, derived from the dried leaves and flowers of the hemp plant, contains delta-9-tetrahydrocannabinol (THC)...
Marijuana, derived from the dried leaves and flowers of the hemp plant, contains delta-9-tetrahydrocannabinol (THC)...
01:24Serum Studies: Renal Function Tests
Renal function tests are crucial for assessing kidney health, monitoring disease progression, and evaluating the kidneys' efficiency in waste elimination, fluid balance, and electrolyte regulation. These tests offer critical insights into kidney function, even though routine measurements may appear normal until there is a significant decline in the glomerular filtration rate or GFR. Typically, signs of kidney impairment only become evident when the GFR falls to about 50% of its normal level.