The reason humanity can be passed down from generation to generation, endlessly, is that men and women responsible for procreation have normal fertility. Otherwise, it would only be possible to reproduce through artificial insemination or cloning. Therefore, how to ensure that men and women have normal fertility is of utmost importance.
When mentioning "illnesses enter through the mouth," people often think of gastrointestinal diseases. In fact, male infertility can also be an "illness that enters through the mouth."
First, fertility is closely related to nutritional factors. Both nutritional deficiency and excess can lead to male infertility. When malnourished, deficiencies in vitamins A, B, C, E and minerals such as calcium, phosphorus, iron, and trace elements like zinc and selenium can result in reduced sperm production and decreased motility. Animal experiments have also shown that malnutrition reduces an animal's semen volume and the fructose content in semen, which provides energy for sperm activity. Nutritional excess during adolescence often leads to obesity. Fat accumulation can cause the loss or impairment of pituitary gland function, preventing or reducing the release of male hormones. This can easily lead to conditions like small testes, small penis, lack of secondary sexual characteristics, and feminization in affected individuals, which may very likely result in infertility in adulthood.
Secondly, long-term consumption of certain foods containing preservatives like nitrites, colorings like sulfonamides, raw cottonseed oil, celery, and others can also lead to a decrease in sperm count and quality.
In addition, scientists from the UK's Medical Research Council have found that the decrease in male sperm count and testicular volume over the past few decades is related to octylphenol, bisphenol A, and butyl benzyl phthalate. These substances are widely used as inner wall coatings for manufacturing items like baby bottles, cans, and food packaging bags.
Therefore, to prevent men responsible for procreation from being "blamed" for infertility due to poor eating habits, it is recommended that from now on, you should pay attention to a balanced diet, ensure the normal intake of vitamins, minerals, and trace elements, and correct nutritional deficiencies or excesses. This will allow you to have good fertility while fully enjoying a "sex"ful life.