Does vitamin D affect testosterone levels?
Background: Vitamin D has been positively correlated with testosterone in older men, but these hormonal relationships have not been examined in military. If an independent association between vitamin D deficiency and low testosterone really exists, it should be demonstrable, regardless of confounders, in different. Context: Available evidence shows an association of vitamin D with androgen levels in men. However, results from preliminary randomized.
These findings are similar to other previous research. Therefore, BMI may not accurately represent body composition in this population. Limitations of this study include the retrospective nature of the medical record review in which we could establish correlations but not causal relationships.
Furthermore, the sample was limited to subjects whose physicians ordered vitamin D and testosterone and is therefore not necessarily representative of all male service members. Lastly, data were not available for confounding variables such as race, physical activity, dietary habits, sun exposure and sex hormone binding globulin. The study was strengthened by only including assays completed within 3 weeks of one another to control for a season of vitamin D analysis, and medical records were reviewed for one geographical location to limit the effect of latitude.
Future studies should consider prospective trials in service members in which vitamin D and testosterone are measured across multiple time points along with a full metabolic profile. Conclusions In conclusion, these data show a high prevalence of vitamin D deficiency in male soldiers and veterans assessed in the southeast region of the United States.
At low 25 OH D concentrations, a linear relationship with testosterone concentrations emerged that indicates vitamin D deficiency may limit testosterone synthesis and potentially limit human performance. Military personnel undergo unique physical and operational training, deployment schedules, and have greater risk of injury than civilians, thereby increasing stress to their neuroendocrine system.
Since both vitamin D deficiency and hypothalamo-pituitary dysfunction plague service members, future research should prospectively assess vitamin D status in comprehensive treatment plans for endocrine disorders to optimise human performance, improve resiliency, and reduce morbidity of warriors and veterans. No funding was used to support this work.
Vitamin D Correlation with Testosterone Concentration in Male US Soldiers and Veterans
Association between plasma OH vitamin D and testosterone levels in men. Clin Endocrinol Oxf ; 77 1: Association of vitamin D status with serum androgen levels in men. Clin Endocrinol Oxf ; 73 2: Evaluation, treatment, and prevention of vitamin D deficiency: An Endocrine Society clinical practice guideline. J Clin Endocrinol Metab ; 96 7: Vitamin D receptor and vitamin D metabolizing enzymes are expressed in the human male reproductive tract.
Hum Reprod ; 25 5: Evidence for a link between bone and testis in 25 OH vit D production: Clinical relevance of optimizing vitamin D status in soldiers to enhance physical and cognitive performance. J Spec Oper Med ; 14 1: Low vitamin D status and suicide: PLoS One ; 8 1: Vitamin D status in female military personnel during combat training.
J Int Soc Sports Nutr ; 7: Does winter time vitamin D3 deficiency result in parathyroid hormone and osteocalcin deviation in healthy 18—26 year old males? Serum estradiol, testosterone, and sex hormone-binding globulin as regulators of peak bone mass and bone turnover rate in young Finnish men. J Clin Endocrinol Metab ; 89 8: Hormone profiles in humans experiencing military survival training.
The 8 Best Supplements to Boost Testosterone Levels
Biol Psychiatry ; 47 Testosterone therapy in men with androgen deficiency syndromes: J Clin Endocrinol Metab ; 95 6: The effect of deployment to a combat zone on testosterone levels and the association with the development of posttraumatic stress symptoms: A longitudinal prospective Dutch military cohort study. Department of Defense Database.10 Easy Ways to Boost Testosterone Naturally
Association of hypogonadism with vitamin D status: Eur J Endocrinol ; 1: Vitamin D is an important factor in estrogen biosynthesis of both female and male gonads. Endocrinology ; 4: Lerchbaum E, Obermayer-Pietsch B. Vitamin D and fertility: Eur J Endocrinol ; 5: High prevalence of chronic pituitary and target-organ hormone abnormalities after blast-related mild traumatic brain injury.
Front Neurol ; 3: Guerrero AF, Alfonso A. Traumatic brain injury-related hypopituitarism: A review and recommendations for screening combat veterans. Mil Med ; 8: Is there convincing biological or behavioral evidence linking vitamin D deficiency to brain dysfunction?
Vitamin D and physical performance. Sports Med ; 43 7: Influence of vitamin D status and vitamin D3 supplementation on genome wide expression of white blood cells: PLoS One ; 8 3: Serum hydroxyvitamin D concentrations and prevalence estimates of hypovitaminosis D in the US population based on assay-adjusted data. J Nutr ; Geographic location and vitamin D synthesis. Mol Aspects Med ; 29 6: Recovery of endocrine and inflammatory mediators following an extended energy deficit.
J Clin Endocrinol Metab ; 99 3: Another study examined how fenugreek affects sexual function and quality of life.
Vitamin D and Testosterone in Healthy Men: A Randomized Controlled Trial.
The researchers provided 60 healthy men between 25 and 52 years old with either mg of fenugreek or an empty placebo pill every day for six weeks The participants reported improvements in strength after taking the fenugreek supplements.
The researchers also found: Ginger Ginger is a common household spice that has played a role in alternative medicine for centuries. It has many health benefits, with strong research showing it may reduce inflammation and maybe even boost testosterone levels Several studies in rats have found ginger has positive effects on testosterone levels and sexual function.
In one day study, researchers found ginger increased testosterone and luteinizing hormone in diabetic rats In another study, the rats' testosterone levels nearly doubled. A third study found greater increases in testosterone when they doubled the amount of ginger they gave the rats 16 In one of the few human studies, 75 infertile men were given a daily ginger supplement. Although it is still early days in the research on ginger and testosterone, eating ginger is very safe and provides numerous other health benefits.
Ginger may increase testosterone levels and sperm count in infertile men. Effects on healthy humans need to be studied. It plays a role in boosting testosterone and controlling estrogen levels. Based on its biological effects, DHEA has become an extremely popular way to boost testosterone.
Out of all the testosterone boosting supplements, DHEA has the best and most extensive research behind it. However, as with most supplements, the results are mixed. Several other studies used similar dosing protocols and found no effect 2223 For this reason, the effects of DHEA on testosterone levels aren't clear.
Nevertheless, DHEA use is banned in professional sports and therefore not suitable for competitive athletes As with some of the other supplements, it may benefit those with low DHEA or testosterone levels.
Although DHEA is one of the most popular testosterone boosters on the market, the research is still mixed. Around mg seems to be a safe and effective daily dose. Known as an aphrodisiac, zinc is an essential mineral involved in more than chemical processes within the body.
As with vitamin D, zinc levels within the body have been closely associated with testosterone levels One study that measured this association found that restricting zinc intake from foods lowered testosterone levels in healthy men.
As expected, zinc supplements in zinc deficient men also increased testosterone levels Another study measured the effects of zinc on infertile men with either low or normal testosterone levels. The researchers found significant benefits for those with low levels, including increased testosterone and sperm count. However, they found no additional benefit for men with normal levels In elite wrestlers, taking zinc each day also helped reduce a decline in testosterone levels following a 4-week high-intensity training regimen In light of these studies, zinc may help boost testosterone levels if you have low testosterone or are deficient in zinc.
Taking zinc also appears to be helpful if you struggle to recover from high-intensity exercise 29 Taking zinc may be effective in those with low zinc or testosterone levels, or those who are currently in stressful training. Also known as Withania somnifera, ashwagandha is another herb used in ancient Indian medicine Ashwagandha is primarily used as an adaptogen, meaning it helps your body handle stress and anxiety One study tested its benefits on sperm quality in infertile men, who received 5 grams per day over a three-month period.
Another study suggests ashwagandha increases exercise performance, strength and fat loss, while also boosting testosterone levels significantly At present, it seems likely that ashwagandha could help increase testosterone levels in stressed individuals, possibly by reducing the stress hormone cortisol. New research shows ashwagandha may help increase testosterone levels, while also improving sexual function and body composition.
Testosterone is absolutely crucial for many aspects of health and body composition. Interestingly, hundreds of testosterone-boosting supplements are now available. However, only a few have significant research behind them.