In a nutshell
This study examined if nut consumption can improve sperm quality in healthy reproductive-aged men.
This study concluded that nut consumption can improve sperm quality in these men.
Some background
Sperm quality has decreased in many developed countries. This is thought to be due to pollution, lifestyle factors such as smoking, and consumption of a Western-style diet. A Western-style diet is high in saturated fats, red and processed meat, high-fat dairy products, refined grains, white potatoes, and is rich in sugary drinks and fried foods. This diet is linked to many other diseases, including heart disease and some cancers.
A number of features are looked at when assessing sperm quality. These include sperm volume, movement, structure, and number of sperm. Sperm DNA can be damaged during sperm production and while it is being stored in the body. This is known as DNA fragmentation. High levels of this are associated with infertility.
Studies have shown that foods rich in nutrients, such as the Mediterranean diet, may improve fertility. Nuts are very nutritious and contain healthy fats, vitamins, and minerals. It is unknown if adding nuts to a western style diet can improve sperm quality.
Methods & findings
98 healthy males were included in this study. All of the men consumed a Western-style diet. Half of the participants were assigned to consume 60g of nuts (walnuts, almonds, and hazelnuts) daily. The other half did not consume any nuts. The study lasted 14 weeks. Blood and sperm samples were collected at the beginning and at the end of this study.
Total sperm count, movement and sperm structure significantly improved in men who ate nuts, when compared to those eating a nut free diet. There was no significant difference in sperm volume between the groups.
Men who consumed nuts had a decreased level of sperm DNA fragmentation when compared to those eating a nut free diet.
The bottom line
This study concluded that nut consumption can improve sperm quality in men.
The fine print
This is a small study. Larger studies will need to be conducted to see how well this works in a larger group. This study looked at healthy men who eat a Western diet. The results may not apply to other diets or men with certain medical conditions.
What’s next?
If you have any concerns regarding fertility, please consult with your physician.
Published By :
The American Journal of Clinical Nutrition
Date :
Nov 01, 2018
