Walnuts May Boost Semen Quality


The daily consumption of walnuts improved the vitality, mobility and formation of sperm in a group of healthy men.

One randomized trial showed that healthy men who added a daily dose of walnuts to their normal diet improved the parameters.

According to Robbie Rubens, Ph.D., of the University of California at Los Angeles, and colleagues, after 12 weeks, those who ate nuts had better vitality, movement and drainage of sperm than those who avoided tree nuts completely.

The researchers reported online in “Reproductive biology” that nuts were also associated with improvements in omega-6 and omega-3 fatty acids.

“It is unknown whether adding nuts to the diet will go beyond the changes in sperm standards as seen in this study to improve the outcome of male births in the population of the fertility clinic or in the general population, and it will require more research, “the researchers wrote.

Laboratory studies in animals and humans have shown that polyunsaturated fatty acids, which are found in high concentrations in fish, fish oil supplements, flax seeds and tree nuts, are involved in the maturation of sperm and the function of the membrane. However, not all clinical studies of male fertility showed differences in polyunsaturated fatty acid concentrations between fertile participants and infertility.

Nuts and nuts have a high proportion of alpha-linolenic acid, a natural source of omega-3 fatty acids, as well as omega-6 fatty acids, antioxidants and micronutrients such as folic acid.

Rubens and his colleagues began to explore whether adding nuts to Western-style diets would improve semen quality. They diagnosed 117 healthy men between the ages of 21 and 35 (average of 25 years) with no known history of infertility to add 75 grams of whole nuts to the normal diet or to continue their normal eating habits and avoid hazelnuts.

Nut was provided by the California Walnut Commission, which provided funds for the study.

In essence, the two groups were similar in age, level of education, ethnicity, body mass index (BMI), body weight and physical activity levels. During the 12-week study, there were no significant changes in body mass index, body weight or physical activity in any of the groups.

The sperm parameters were improved in the group that consumed the nut (but not in the control group), which greatly improved the vitality, movement and drainage of the sperm.

The serum fatty acid profiles were similar in the two groups at the baseline, and there was only a significant increase in the participants who took nuts in omega-6 and omega-3 fatty acids for 12 weeks.

Omega-3 was the only one that increased alpha-linolenic acid.

Despite the change in the fatty acids in the serum, the image of the fatty acids in the sperm showed no changes within each group. However, a negligible increase in eicosadienoic acid in the group of nuts, together with a negligible decrease in the control group, resulted in a significant difference between the group.

There were no differences between chromosomal chromosomal dysfunction of chromosomes X, Y and 18 at the beginning of the study or at the end of the study, but in the walnut group there was a significant reduction in the sex chromosome eradication and the sperm lacked of a sexual chromosome.

Increasing amounts of alpha-linolenic acid were associated with sperm with a reduced sperm count and a percentage of sperm sex chromosomes with any chromosomal digital anomaly at the 12-week visit.

The authors acknowledged that the study was limited to collecting blood samples to analyze hormones at all times of the day.

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