Micronutrients and Male Fertility: Exploring the Evidence for Vitamen

This article explores the evidence base behind key nutrients known to influence male reproductive health. It draws on current research to explain the rationale for their inclusion in Vitamen, our in male fertility supplements.

The Male Fertility Landscape

Infertility affects 8–12% of couples globally, and male factors contribute to approximately 50% of these cases ^[7]. Male semen is a complex fluid composed of sperm and glandular secretions rich in biologically active compounds such as zinc, magnesium, calcium, selenium, copper, carnitine, and vitamins C and E ^[8,9,10].

These compounds support spermatogenesis, sperm maturation, motility, and overall fertility potential. Suboptimal dietary intake of these nutrients has been linked with poorer semen quality and reduced fertility outcomes ^[8,11,12].

Key Nutrients in Male Fertility

Zinc

Zinc is a foundational nutrient for male fertility. High levels are present in the prostate and seminal plasma. It is essential for sperm production, morphology preservation, motility, and antioxidant protection ^[1,2,3,4,5].

Research shows that zinc concentrations in semen correlate positively with sperm count, viability, and motility. It helps maintain the structural integrity of sperm DNA and protects against oxidative damage.

Selenium

Selenium is a potent antioxidant and critical for sperm viability and motility. Its deficiency is associated with increased sperm DNA fragmentation and impaired fertility outcomes ^[4,6].

Folate

Folate plays a vital role in DNA synthesis and cell division. In men, it contributes to healthy sperm DNA and chromosomal stability. Low folate status may affect fertilisation success and embryo development.

Vitamin D

Observational studies have linked vitamin D deficiency to lower testosterone levels and compromised semen parameters including reduced sperm count, motility, and morphology.

Iodine and Thyroid Function

Thyroid hormones regulate key aspects of male fertility. Iodine is essential for thyroid hormone synthesis. Deficiencies have been associated with altered testosterone levels, reduced semen concentration, and prolonged time to pregnancy.

Other Trace Elements: Magnesium, Calcium, Copper

Magnesium, calcium, and copper contribute to hormonal regulation and sperm quality. Comparative studies have found lower levels of these minerals in the semen of infertile men versus fertile controls ^[13,14].

Clinical Relevance

Dietary insufficiencies in micronutrients may negatively impact spermatogenesis, hormone production, and sperm function. Supplementation with bioavailable forms of these nutrients may be beneficial, particularly in men with subfertility or increased oxidative stress.

References

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2. Yamaguchi S. et al. Zinc is essential for spermatogenesis. PNAS. 2009;106:10859–10864. doi: 10.1073/pnas.0900602106.
3. Mirnamniha M. et al. Role of trace elements in sperm function. Rev. Environ. Health. 2019;34:339–348. doi: 10.1515/reveh-2019-0008.
4. Lerda D. Sperm characteristics in lead exposure. Am. J. Ind. Med. 1992;22:567–571. doi: 10.1002/ajim.4700220411.
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6. Salas-Huetos A. et al. Diet and sperm quality. Reprod. Biol. 2019;19:219–224. doi: 10.1016/j.repbio.2019.07.005.
7. Agarwal A. et al. Male infertility. Lancet. 2021;397(10271):319–333. doi:10.1016/s0140-6736(20)32667-2.
8. Schowell M.G. et al. Antioxidants for male subfertility. Cochrane Database Syst. Rev. 2014;12:CD007411.
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10. Owen D.H., Katz D.F. Properties of human semen. J. Androl. 2005;26:459–469. doi: 10.2164/jandrol.04104.
11. Salas-Huetos A. et al. Dietary impact on male fertility. Hum. Reprod. Update. 2017;23:371–389. doi: 10.1093/humupd/dmx006.
12. Szkodziak P. et al. Male factor infertility review. Ann. Agric. Environ. Med. 2016;23:227–230. doi: 10.5604/12321966.1203881.
13. Nenkova G. et al. Trace elements and sperm quality. Balkan Med. J. 2017;34:343–348. doi: 10.4274/balkanmedj.2016.0147.