The one I have been trying is Green Tea from www.Appliednutrition.com . In a two capsule serving you have 400 mg of green tea extract (EGCG), 160 mg of caffeine, 100 mg of various antioxidants, and 86 mg of different "vitality boosts" such as ginseng. The serving size is two capsules, and you are supposed to take four total, but I only take one in the morning and one in the afternoon.

After four weeks of this - what has it done? The supplement helps as an appetite suppressant, probably due to the caffeine. I dropped about five pounds of mostly winter weight I tend to gain from stress eating during one of the hardest parts of the school year. You eat to stay awake and focus on projects when work is long and sleep is short. I also tend to drink my calories with sweetened, as in sugar, tea.

So with the extra caffeine I am drinking less tea, and the caffeine has enabled me to concentrate more without having to revert to bad habits such going to the coke machine when I need an energy jolt at work. Cons? I have to drink a lot more water. One morning I strained a muscle in my calf after my fourth set of 100 jumping jacks. I could tell I was working out dehydrated and foolishly pushed through. Too, if I don't stay hydrated my muscles get stiff and tight.

Here is an article explaining the pros and cons of Green Tea as a supplement.

ww.advancedmolecularlabs.com/fat-loss/fat-attack/

Do I recommend it? The jury is still out. So far, taken in moderation, and with extra hydration it seems safe.