Twinlab's Diet Fuel is a great product for those looking for a moderately strong, not too extreme, formula to enhance the weight loss they experience through diet and exercise. Diet Fuel has a few key ingredients like the patented CitriMax extract of Garcinia cambogia fruit, chromium picolinate and the appetite suppressing amino acid L-phenylalanine. The focus of Diet Fuel is optimizing your metabolism and insulin function to bring about slow but steady weight loss; it's not a super-caffeinated diet pill that's delivers a short-term energy boost. There is some caffeine in Diet Fuel, but less than some of the stronger thermogenic fat burners we've seen. So for an affordable and effective thermogenic supplement, you've got a great option in Twinlab's ephedra-free Diet Fuel.