Severe calorie restriction or excessive calorie intake can disrupt hormonal balance. Foods rich in protein, such as lean meats, fish, eggs, and legumes, help provide the necessary amino acids needed for testosterone synthesis. Proteins are the building blocks of our body, essential for muscle growth and repair. Each macronutrient serves a specific purpose in our body, and their proper balance is essential for overall health. Oleocanthal inhibits COX-1 and COX-2 enzyme activity, while resveratrol reduces NO production, ROS levels, and LDL cholesterol. Effect of low energy availability and energy deficits on circulating testosterone concentrations. Additional research reported significant decreases in testosterone concentrations in long-distance runners who were categorized as "low energy available" (−1) compared to runners categorized as "moderate energy available" (30–45 kcal·kg FFM·day−1) . Large energy deficits appear to negatively affect testosterone concentrations. Several studies have demonstrated that a low energy availability can decrease LH concentrations, subsequently affecting testosterone synthesis. The impact of low energy availability on various physiological systems in the body is not the primary scope of this paper, instead, the focus is directed on the effect of low energy availability on circulating testosterone concentration and testosterone biosynthesis. For example, an athlete training at a high intensity or prolonged duration, while attempting to lose fat mass by reducing caloric intake, may cause a low energy availability. Low energy availability may reduce the body’s energy reserves, limiting its ability to support normal physiological function needed to maintain optimal health . 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 . Achieving the right balance of macronutrients in your diet is crucial for optimizing testosterone production and supporting muscle growth, fat loss, and overall health. High protein intake can increase cortisol levels, a hormone that can suppress testosterone production. Your dietary pattern can directly affect testosterone and other hormone levels, so it’s essential to consider these dietary components in your routine for better overall hormonal health. Specific dietary patterns have been shown to influence your testosterone levels, which are crucial for maintaining muscle mass and overall health. While dietary fats provide the cholesterol needed for hormone production, the role of carbohydrates is equally important for hormonal homeostasis. Significant associations were also noted between vitamin D concentrations and circulating testosterone and SHBG concentrations, as well as the free androgen index . Men with vitamin D deficiency have exhibited significantly lower testosterone concentrations compared to men with normal vitamin D concentrations . Vitamin D receptors are present on the Leydig cells within the testes, where the synthesis of testosterone from cholesterol occurs , suggesting an important role of vitamin D on testosterone synthesis. BFM, total body fat mass; SMM, skeletal muscle mass; VFM, visceral fat mass; SFM, subcutaneous fat mass. Multivariate linear regression of serum total testosterone levels and selected anthropometric, inflammation, lipid, glucose, and iron-related biomarkers. Body compositions were divided by the body weight and expressed as the total body fat mass (BFM) (%), skeletal muscle mass (SMM) (%), visceral fat mass (VFM) (%), and subcutaneous fat mass (SFM) (%). This makes dietary fat intake the most critical component of testosterone nutrition. A negative energy balance can lower testosterone levels in the short term (9), but this drop is immediately erased once calorie intake is brought back up to maintenance (10). Saturated and trans fats have been linked to lower testosterone levels and should be limited in your diet. Protein is vital for muscle growth and repair, but consuming excessive amounts of protein can negatively impact testosterone production. It is also important to note that protein supplementation regardless of its source (soy or whey), when combined with resistance training can result in a significant increase in lean body mass . However, they are consistent in demonstrating that whey protein supplementation may be the superior protein supplement for enhancing the testosterone response to training. Subsequent research, using the same three groups, albeit for 12 weeks and combined with resistance exercise, also reported no significant pre- or post-training changes in serum estradiol concentrations in any of the study groups . Additionally, testosterone concentrations were significantly lower during SPS compared to both WPS and PLA during the post-exercise period. Although testosterone concentrations were significantly elevated from baseline during and up to 5-min post-exercise, only the WPS and PLA trials resulted in significant increases in testosterone concentrations at the 15- and 30-min post-exercise measures. Although soy protein consumption has been demonstrated to have significant benefits on strength performance following 12 weeks of resistance training , its role in androgen biology has made it a topic of interest. Dietary protein supports the replenishment of skeletal muscle protein as it is degraded or damaged by intense exercise 94,95.
