Our products are designed to complement each other, however, there are a few products that we recommend you don’t take at the same time such as:PRO-BURN and PRO-BCOMPLEX- because they both contain vitamin B.If you are taking the PRO-BURN supplement, and you want to also use the PRO-SLEEP supplement, we recommend that you don’t take them in the same dose. You can take PRO-BURN in the morning and take PRO-SLEEP at night.