Second, give up being fat and choose to be a tough muscular man. Studies have shown that fat contains a high concentration of aromatase, which will convert testosterone into estrogen. Fat people who are covered in fat should lose fat for their own sexual happiness.
Third, get more sunshine or take vitamin D supplements. A new study followed 2069 elderly people for three years. The results show that men who supplement higher vitamin D will have higher free testosterone. Because of working indoors for a long time, many people are in a state of "not seeing the sun", and it is difficult for the skin to synthesize vitamin D normally (it needs ultraviolet rays of 295-300nm). Afraid of tanning? Then go to the drugstore to buy some, but don't overdo it. Fourth, don't be afraid of cholesterol. High cholesterol is likely to increase the risk of atherosclerosis and coronary heart disease. But you should know that cholesterol is the raw material for synthesizing testosterone. Cholesterol synthesized by human body accounts for 70%~80% of cholesterol metabolism, and the rest can be ingested through diet (the more intake, the less self-synthesis). The previous dietary guidelines suggested that cholesterol intake should not exceed 300mg per day, but the latest dietary guidelines cancelled this indicator. Throw the yolk out every time you eat an egg? If there is no abnormal cholesterol metabolism, you may wish to eat more egg yolk.
Fifth, get enough zinc. Zinc is an indispensable trace element in human body, which participates in the whole process of sperm formation, maturation and capacitation. Zinc deficiency? Be careful not to have sex! In order to avoid zinc deficiency, you can eat more kelp, sea fish, prawns and other foods in your usual diet.