Caffeine

Caffeine comes in many forms, but is often included in pre-workout supplements and thermogenic fat burners. In order to get the best benefits from taking caffeine, aim to use it about 30 minutes before you hit the gym, or with breakfast to get that morning boost. A good dose to start off with is between 200 and 400mg daily.

Caffeine stimulates the central nervous system and you should always follow strict dosing directions listed on the product that you buy. It's possible to develop a tolerance to caffeine and stimulants. You can always take a break from caffeine and stimulants every once and a while to make sure you continue to see the best results from use.

Make sure to add up the caffeine in any supplements you take as well as caffeinated drinks as part of your daily total.