Depending on the brand, it's equivalent to a half of cup of coffee. Although green tea contains l-theanine which helps offset the jitters from caffeine. Persona

Depending on the brand, it's equivalent to a half of cup of coffee. Although green tea contains l-theanine which helps offset the jitters from caffeine. Personally I try to limit caffeine to the most bare minimum as I personally find that it causes a reduction in my emotional spectrum.