Alpha brain is another popular nootropic supplement to support different brain functions. You can use it regularly if you would like to increase your focus, memory, and mental clarity. Many people cannot think clearly and make the right decisions under stress. You can be more focused and alert with the regular use of this product. It helps you to be relaxed and can help you make the right decisions during stressful situations. Developed by the well-known Onnit Labs, this nootropic supplement has a great formula to enhance cognitive functions.