The results from these studies do not provide any conclusive evidence regarding soy protein having a negative effect on testosterone production. A meta-analysis examining the effect of isoflavones and soy protein intake on testosterone concentrations and SHBG in men concluded that there was no negative effect of soy protein intake on TT, FT, or SHBG . Considering that high-fat diets (HFD) increase cholesterol levels, increases in dietary fat consumption have been suggested to potentially result in an increase in testosterone production . In a study on healthy, young men, Starks and colleagues reported that PS supplementation significantly increased the testosterone to cortisol ratio during a bout of moderate intensity exercise on a cycle ergometer.
Several studies have shown that zinc supplementation can restore testosterone concentrations to their normal physiological range 153,154,158. Some investigations have indicated that rodents fed soy protein exhibited lower serum testosterone concentrations 103,104, while others reported no negative effects on circulating testosterone 105,106. Effect of fat and protein intake on changes in circulating testosterone concentrations.
Zinc supplementation consistently improves testosterone concentrations, especially in men with existing deficiencies . Research reveals the dramatic impact of zinc deficiency reduces testosterone levels. This essential trace mineral directly influences testosterone synthesis through multiple pathways, making it one of the most important nutrients for hormonal health. B vitamins, particularly B12, demonstrate a direct relationship with total testosterone levels . When testosterone levels rise sufficiently, the hormone signals back to both your hypothalamus and pituitary . Your body's testosterone production works through a sophisticated communication network that connects your brain to your reproductive organs.
To the best of our knowledge, this is the first systematic review examining the relationship between this range of micronutrients, sex hormones and IGF-1 in people of middle and older age. Selenium appears to have little effect on testosterone (2 trials), vitamin E had no effect on DHEAS, and zinc had little or no effect on IGF-1 (a single trial each). We found 26 trials assessing effects of micronutrient supplementation, but no trials assessing effects of vitamins A or C, potassium, iron, or copper, on our outcomes. Two studies in the Czech Republic examined the effects of 240 μg of selenium (as selenomethionine) on testosterone.
Meaningful improvements in testosterone levels typically become apparent within 8-12 weeks of implementing consistent dietary changes, though some men may notice symptom improvements within 4-6 weeks. Whole eggs, shellfish, and organ meats provide cholesterol along with other testosterone-supporting nutrients, making them valuable additions to hormone-optimization diets. Follow-up testing at 8-12 week intervals allows sufficient time for dietary changes to produce measurable effects on hormone levels while preventing excessive testing costs. This initial assessment provides the foundation for measuring progress and helps identify which factors may be limiting testosterone production. Men may benefit from tracking dietary zinc intake and monitoring testosterone response rather than relying solely on zinc level measurements. Total testosterone indicates overall hormone production, while free testosterone reflects the biologically active portion available to tissues. Evening meals should emphasize protein and healthy fats while minimizing high-glycemic carbohydrates that can interfere with sleep quality.
It also impacts testosterone production through promoting the wellbeing of Leydig cells in the testes which are accountable for testosterone production. Selenium deficiency has been found to be related to low testosterone levels. It also assists in the production of testosterone since it assists in the maintenance of the testes’ health. Research has indicated that with increased magnesium intake, there are significant rises in free and total testosterone among the active population. Macronutrients are required, but micronutrients are also needed, as the name suggests, for the proper functioning of the human body. It is important to state that nutrition has an impact on testosterone levels and lifestyle factors such as exercise and sleep are also acknowledged to influence testosterone levels.