Which supplements you can take together will depend on the ingredients in each. As mentioned, caffeine is a common ingredient in fat burners but it is also commonly used as a stimulant in pre-workout products. When choosing your supplement regime, consider the ingredients in each product and make sure you aren’t taking too much of anything that could have a negative impact on your health. A number of our fat burning products are also effective pre-workout supplements, so if you are concerned about combining products, check these out for an effective, multi-use product that can work with your goals.