Try organic cacao powder, I drop a heaped table spoon of it into my smoothie. Total super food, it is the "food of the gods", really rains supreme in my view of all foods so is a MUST HAVE FOOD item for me Its what provides the amazing properties of chocolate! of course minus the sugar,fat and processing... just the raw stuff.
Back to the point it has some good mental stimulation, here is a good little summary https://thegoodstuffco.com/blogs/monthl ... ain-power/ for me I am "sensitive" to coffee as well, so I only have at earliest a coffee 2 hours gap with my smoothie as cacao powder has a little caffeine in it.