Nicely put diabolik.
I recommend if you need anymore than 200mg caffeine, or if preworkout drinks dont work, to seriously consider taking time off of stimulants.
Adrenal fatigue is not fun. Needing large amounts of stims to get energy to lift is not good.
Lets remember, the gym/lifting should IMPROVE energy levels, make you youthful.
we should be able to hit the weights with water only.
preworkouts are just icing on the cake. Something to give us the edge.
Everyones different. There are such things as non-responders. One product that works well for someone may not work at all for the next.
I find white flood @ 2 scoops to give me powerful energy, endurance, pumps and focus.
If i find i need more than 2 scoops, i will take a week to 2 weeks off. When i start again, all i need is one scoop.