The cheapest and natural Viagra is to get plenty of sunshine. Because the level of testosterone in human blood will rise with the increase of vitamin D content in the body. More sunlight can increase vitamin D content in the body
Researchers at Graz Medical University in Austria found that men with at least 30 ng of vitamin D per ml of blood had significantly higher levels of testosterone than those with vitamin D levels lower than 30 ng per ml of blood. Their quality of sexual life is also much higher. It is understood that 30 ng of vitamin D per ml of blood is the normal level, and 40-60 ng of vitamin D per ml of blood is the best. Under ultraviolet irradiation, 90% of vitamin D in the body is produced by the skin.
Studies have shown that the level of testosterone in the body changes with the fluctuation of vitamin D content. After the fall of October every year, the levels of vitamin D and testosterone in the human body will decrease synchronously, and they will be the lowest in March next year. This is because people spend less time outside the home and have less chance to get in the sun. The study also reconfirmed that exposure to the sun for one hour a day increased testosterone by 69%.
Bland, spokesman of Rizhao Research Forum in the Netherlands, said: "if people can ensure sufficient vitamin D level in the body, it will help stabilize testosterone content and maintain a high level of sexual desire. The findings have a greater impact on men. A study from the University of Utrecht in the Netherlands found that serotonin, known as "happiness hormone", is a pleasant neurotransmitter, whose level and activity determine whether sex lasts or not. According to psychiatrist marcel, studies have shown that the serotonin in men with premature ejaculation is inactive and secreted less. But if these men were stimulated with light, they could increase the secretion of serotonin. In addition to increasing vitamin D content, proper use of sex toy and sex doll can also improve the quality of sexual life.
Dr. Simon of McGill University in Canada pointed out that going out to the outdoors and more sun exposure can improve the level of serotonin in the brain. Even in overcast days, the natural light received by the human body can enhance the effect of serotonin. The effect of "helpfulness" is the best. The United States has also developed a special lamp, which can emit light waves similar to sunlight.
Tryptophan is a key component of serotonin. Increasing the intake of this component can also indirectly enhance the effect of serotonin. The tryptophan content in Turkey and banana is very high. You can eat some in moderation.