Fish oil supplements associated with male reproductive health

​Taking fish oil supplements may improve sperm quality in healthy young men, a new study Danish study suggests.


The study was undertaken at Department of Growth and Reproduction, Rigshospitalet and has just been published in ”JAMA Network OPEN”. Researchers studied 1,679 Danish men taking physical examinations for compulsory military service. Their average age was 19, and 98 of them reported taking fish oil supplements during the previous three months.

Compared with those who took none, men who took fish oil supplements for at least 60 days during the previous three months had higher sperm count, a greater proportion of normal sperm cells, higher average semen volume and larger average testicular size. They also had significantly lower follicle-stimulating hormone levels and lower luteinizing hormone levels, both indicators of better testicular function. There was also a dose-response effect for fish oil: Those who took supplements on more than 60 days had better testicular function that those who took them less often.

- Men who take fish oil supplements may have a better health behavior for example be more physical active, smoke and drink less, said the lead author, Dr. Tina Kold Jensen. - Nevertheless, the study took into account these factors and interestingly men who took supplements other than fish oil, such as vitamin C, vitamin D or multivitamins did not have better semen quality.

- Our findings need to be confirmed in clinical controlled trials, Tina Kold Jensen continues and recommend men in fertile age to include fat fish in their diet.

For further information contact

Professor Tina Kold Jensen
Department of Growth and Reproduction
Tel.: 2946 4350

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