4.7 Article

Dairy food intake in relation to semen quality and reproductive hormone levels among physically active young men

Journal

HUMAN REPRODUCTION
Volume 28, Issue 8, Pages 2265-2275

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/humrep/det133

Keywords

diet; dairy; environmental effects; semen quality

Funding

  1. European Union [212844]
  2. Ruth L. Kirschstein National Research Service Award from the National Institutes of Health [T32 DK007703-16]
  3. [P30 DK046200]

Ask authors/readers for more resources

Is increased consumption of dairy foods associated with lower semen quality? We found that intake of full-fat dairy was inversely related to sperm motility and morphology. These associations were driven primarily by intake of cheese and were independent of overall dietary patterns. It has been suggested that environmental estrogens could be responsible for the putative secular decline in sperm counts. Dairy foods contain large amounts of estrogens. While some studies have suggested dairy as a possible contributing factor for decreased semen quality, this finding has not been consistent across studies. The Rochester Young Mens Study (n 189) was a cross-sectional study conducted between 2009 and 2010 at the University of Rochester. Men aged 1822 years were included in this analysis. Diet was assessed via food frequency questionnaire. Linear regression was used to analyze the relation between dairy intake and conventional semen quality parameters (total sperm count, sperm concentration, progressive motility, morphology and ejaculate volume) adjusting for age, abstinence time, race, smoking status, body mass index, recruitment period, moderate-to-intense exercise, TV watching and total calorie intake. Total dairy food intake was inversely related to sperm morphology (P-trend 0.004). This association was mostly driven by intake of full-fat dairy foods. The adjusted difference (95 confidence interval) in normal sperm morphology percent was 3.2 (4.5 to 1.8) between men in the upper half and those in the lower half of full-fat dairy intake (P 0.0001), while the equivalent contrast for low-fat dairy intake was less pronounced [1.3 (2.7 to 0.07; P 0.06)]. Full-fat dairy intake was also associated with significantly lower percent progressively motile sperm (P 0.05). As it was a cross-sectional study, causal inference is limited. Further research is needed to prove a causal link between a high consumption of full-fat dairy foods and detrimental effects on semen quality. If verified our findings would mean that intake of full-fat dairy foods should be considered in attempts to explain secular trends in semen quality and that men trying to have children should restrict their intake. European Union Seventh Framework Program (Environment), Developmental Effects of Environment on Reproductive Health (DEER) grant 212844. Grant P30 DK046200 and Ruth L. Kirschstein National Research Service Award T32 DK007703-16 from the National Institutes of Health. None of the authors has any conflicts of interest to declare.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available