According to scientific research, the following types of tea are helpful in improving male sexual function:

1. Green tea: Green tea is rich in tea polyphenols, which helps improve blood circulation and promote body function. Maintains a healthy state and therefore helps improve male sexual function.

2. Dark tea: Dark tea contains polyphenols, which can promote the expansion and contraction of blood vessels, maintain acid-base balance, and have good effects on preventing and treating male impotence.

3. Oolong tea: Oolong tea contains a large amount of tea polyphenols, which can improve blood circulation, lower blood pressure and blood lipid content, help protect the heart, and improve male erectile function.

4. Tieguanyin tea: Tieguanyin tea has a firm appearance, dark green color, and is rich in minerals. It has a great effect on men's health. It can regulate the endocrine system in the body and fundamentally protect men's health.