Because I sometimes get sleepy when coding words, I bought DMAE, a health care product from GNC that claims to be refreshing, to try it, and after eating one, I was so excited that I couldn't sleep, and my biological clock was completely messed up.

Don't dare to take medicine anymore......

But I quit smoking, coffee hurts my stomach, tea is hungry, and betel nut chewing is unaccustomed. Is there any other way to refresh your mind without hurting your body? Ask for recommendations. (To be continued......)