Cerebroptim work best when you use them all together or one after the other without interruptions. If you have to select which one, please visit the product link for the cerebroptim products to see the specific health benefits of each type. Relasma is a cognition relaxer, it helps with sleep and supports long-term brain function. Namur is a cognition enhancer and helps with neuronal plasticity, speech, and behavior. Niox is a cognition energizer and is great for productivity, focus, and attention.