Feltrex is a proprietary blend of ingredients used in some health supplements, often marketed for cognitive enhancement or overall wellness. While the specific formulation can vary by product, it typically includes a mix of vitamins, minerals, herbal extracts, and amino acids. Common components may include ingredients like bacopa monnieri, ginkgo biloba, or other nootropic substances aimed at improving mental clarity and focus. Always check the product label for the exact ingredients and consult with a healthcare professional before use.