In May 2019 researchers from Australia published the results of their study to assess the association between major dietary patterns and testicular function. A total of 290 men (average age 20 years, average BMI 24) were included in the study. Information on their usual dietary intake was collected via a food frequency questionnaire. Two dietary patterns were identified, “Healthy” and “Western”, and each individual was given a score for each dietary pattern. It was noted that 13% were smokers, 52% were ‘moderate’ alcohol drinkers, 23% frequently used recreational drugs and 68% reported ‘high’ physical activity levels. Testicular volume, total sperm per ejaculate, morning serum testosterone levels, inhibin B and sex hormones were assessed following an average of two days abstinence from sex. Sex hormones are crucial for the proper development and function of the body and to regulate sexual differentiation, secondary sex characteristics, and sexual behaviour patterns. Results showed that a higher Western dietary score was associated with a lower sperm concentration. A Western diet also appeared to have an impact on the sex hormones in that there was a reduction in DHT 3α-diol levels and an increase in estradiol levels. Further research is required.
Ognjenovic M et al. Associations between major dietary patterns and testicular function in a population-based cohort of young men: results from the Western Australian Pregnancy Cohort (Raine) Study. Andrology. 2019 May;7(3):273-280.