Muhammad Q.
You don’t really need to drink or eat anything and in order to be focused.
You just need to fix your sleeping program. Sleep about 8 or 9 pm and wake up at dawn around 3 or 4 am and you will do all your tasks by 8 am hopefully
Maxime S.
boiled herbal water(herbs grown in your area ..eg.lemongrass,basil leaf,etc), turmeric and black pepper water/milk,Milk from cow(A2 breed), coconut water,coconut milk