Recently, The Journal of Steroid Biochemistry and Molecular Biology published a new study. Researchers from the University of Worcester and the University of Warwick found that a low-fat diet can reduce male testosterone levels by 10% to 15%.
The study by the University of Worcester and the University of Warwick merged the results of six studies. The researchers first asked 206 men to take a high-fat diet (fat ratio of more than 40%), and then a low-fat diet (fat ratio of less than 20%). Experimental data showed that the testosterone levels of the subjects were reduced by an average of 10% to 15%, and the testosterone of vegetarians could even be reduced by 26%.
Research further pointed out that the monounsaturated fats in olive oil, avocado and nuts can promote the production of testosterone. However, the omega-6 polyunsaturated fats in vegetable oils will reduce the ability of cells to produce testosterone, because highly unsaturated fats are more susceptible to oxidation and will damage cells.
Testosterone (testo sterone, also known as testosterone, testosterone or testosterone) is a steroid androgen. Some “male” characteristics are related to testosterone, such as a deep voice and lush body hair.
Research data shows that since the 1970s, the average testosterone level of western men has been declining, and the rate of hypogonadism (ie, low testosterone) has been increasing. Researchers believe that low-risk dietary adjustments can effectively treat low testosterone.
However, testosterone is not unique to men. In men, testosterone is secreted by the testicles, while in women, testosterone is secreted by the ovaries. The adrenal glands also secrete a small amount of testosterone.
Testosterone levels are essential to people’s sports performance, mental health and sexual health. It has the function of maintaining bone density and strength, maintaining muscle strength and mass, regulating fat distribution, and improving physical fitness. Therefore, low testosterone can lead to physical weakness and osteoporosis.
For men, testosterone has an important effect on the development of male reproductive organs such as testicles and prostate. It can regulate the production of sperm and affect the growth of body hair. For women, testosterone can also be used as a drug to treat breast cancer. In addition, testosterone is also a kind of hormone therapy for degeneration.
Generally, the normal range of male testosterone is about 270-1070ng/dL, with an average level of 679ng/dL. Some researchers believe that the testosterone level of healthy men should be between 400-600ng/dL. Testosterone levels decrease as men age.
Normal male testosterone peaks around the age of 20, and then gradually declines. Therefore, older men sometimes use testosterone as an additional supplement.
The lead researcher of the study, Joseph Whitaker, said: “Low testosterone levels are associated with higher risks of heart disease, diabetes and Alzheimer’s disease.”
However, the opposite is true. Previous studies have shown that elevated testosterone levels in men can lead to some anti-social behaviors, and may disrupt romantic relationships, and in some cases increase people’s desire for material wealth. Later Chinese scholars also discovered that too high testosterone can lead to more selfish behavior. This shows that testosterone is also related to aggressive and selfish behaviors in humans and animals.
The research team of Associate Professor Wu Yin from Shenzhen University found that high levels of testosterone destroy the activity and functionality of the temporal-parietal junction (TPJ) of the brain responsible for self-perception and self-processing in a study of the correlation between male generosity and testosterone levels. connect.
The temporal parietal junction (TPJ) is the intersection of the parietal and temporal lobes of the brain. This area plays a key role in self-perception, self-processing, and pro-social behavior.
The researchers conducted a double-blind placebo-controlled experiment on 70 male volunteers, all of whom were between 18 and 25 years old.
Volunteers were randomly divided into two groups. The researchers applied gel on their upper arms and shoulders. One group contained 150 mg of testosterone; the other group contained an equal amount of placebo.
Then, the researchers asked the volunteers to assess their emotional closeness to the people around them—social distance, and asked the volunteers to allocate money to these people. Getting more money for oneself is considered selfish behavior, and getting more money for others is considered generosity.
The results of the experiment showed that the degree of generosity of all subjects towards others decreased with social distancing, but the volunteers coated with testosterone decreased faster. There was no significant difference in the degree of generosity between the two groups of volunteers when faced with the people closest to them (the ones with the closest social distance).
Fat in the diet has always been a controversial topic in nutritional science, and supporters of various diets often disagree. People usually think that a low-fat diet can lower cholesterol, but this study also suggests that low-fat can also lower testosterone levels.
Traditionally, the focus of a healthy diet is to limit fat intake. The current dietary guidelines in the United Kingdom and the United States both limit fat intake to less than 35% of total calories.
But with the in-depth study of the high-fat, low-carbohydrate diet, people began to re-examine this view. In summary, in recent years, high-fat diets have been shown to reduce triglycerides, lower blood pressure, and increase high-density lipoprotein cholesterol. This study now shows that high-fat diets can increase testosterone levels.