KDT Optometry nutraMetrix - The best quality supplements to maintain your overall healthy lifestyle. In the supplement world, there is an enormous difference in the quality of the products in this FDA unregulated industry. We offer the highest quality products with clinical studies to back up the claims unlike most of the products out there which state outrageous claims without any clinical proof. Dr. Truong and his family personally utilize the products and fully stands behind them 100%. Remember that your happiness is a reflection of your health.