Lipids, particularly certain classes such as polyunsaturated fatty acids (PUFAs), play important roles in the male reproductive system, and their use is supported by scientific evidence. Multiple studies have demonstrated that lipids are vital structural and functional components of sperm cell membranes, influencing fluidity, motility, and the ability of sperm to fuse with the egg. Omega-3 fatty acids (such as EPA and DHA) are especially important; research has shown that supplementation can improve sperm count, motility, and morphology in men with subfertility. Additionally, adequate lipid composition in the diet supports the synthesis of steroid hormones, including testosterone, which is critical for male reproductive health.

Clinical trials and observational studies have linked diets rich in healthy fats (such as those found in fish oil, nuts, and seeds) with improved semen parameters. Conversely, deficiencies in essential fatty acids or excessive intake of trans and saturated fats have been associated with reduced fertility and altered hormonal profiles. Thus, scientific evidence supports the role of specific lipids in maintaining reproductive function, although not all lipid types are beneficial. Overall, lipid intake, particularly of omega-3 PUFAs, is considered an important factor in supporting male reproductive health.