1. In winter, you can drink some Polygonum multiflorum Thunb. Rehmannia Thunb. can nourish blood and kidney, and Rehmannia Thunb. can strengthen the heart and nourish the kidney. When they are brewed together, they can supplement kidney qi and regulate blood circulation.

2. You can also drink some Semen Cuscutae Bushen tea, which can treat symptoms such as low sexual intercourse in men. Yiyang can tonify yin and stop impotence.

3. Secondly, you can drink some black tea. If boys are weak in body and stomach, drinking oolong tea and green tea will stimulate their bodies, so fully fermented and less irritating black tea is more suitable.