Nutrition and Dietary Supplementation in the Context of Male Fertility

When examining the fundamental nutritional components critical to male reproductive health, lipids emerge as a pivotal factor—both in terms of their qualitative composition and their quantitative representation within the daily dietary intake. Extensive scientific evidence confirms that excessive consumption of saturated fatty acids and *trans*-fatty acids (commonly found in red meat, organ meats, high-fat animal-derived products, fast-food items, industrially hydrogenated margarines, sugar-laden confectionery, and sweetened bakery products) is strongly associated with diminished fertility and compromised semen quality. A landmark clinical investigation conducted by T.K. Jensen and colleagues (published in 2013) demonstrated that male participants whose diets derived at least 15% of total daily energy from saturated fats exhibited statistically significant deteriorations in key semen parameters, including reduced sperm concentration per milliliter of ejaculate and a lower total sperm count. Furthermore, chronic overconsumption of saturated fats contributes to the development of hypercholesterolemia—a pathological elevation of blood cholesterol levels—which in turn adversely affects reproductive function by impairing sperm motility, increasing the prevalence of morphological abnormalities in sperm structure, and reducing overall semen volume. Conversely, the presence of monounsaturated and polyunsaturated fatty acids—particularly those belonging to the omega-3 family—exerts a beneficial effect on reproductive health. Comparative analyses published in 2010 under the direction of M.R. Safarinejad revealed that fertile men exhibited significantly higher concentrations of omega-3 fatty acids in both blood plasma and sperm cells when compared to infertile counterparts. Consequently, a nutritionally balanced diet should prioritize the regular inclusion of high-quality sources of essential unsaturated fatty acids (EUFAs), which are abundantly found in fatty marine fish (such as Atlantic salmon, mackerel, and sardines), unrefined plant-based oils (including flaxseed and canola oil), flaxseeds, and walnuts—all of which are rich in alpha-linolenic acid (ALA).