Alright boys and girls I'm going to save some lives today. Don't drink diet soft drinks, why you say? Let me explain. The sugar molecule in everything is cyclic or ringed like a doughnut, all sugars are different variations of 5,6, or 7 carbon rings, which means they have a specific metabolic pathway. Aspartame, the cornerstone of the diet industry is shaped like an amino acid or a plus sign. Humans also have specific ways of digesting amino acids, what I'm saying is that we have specific paths for specific molecules. Therefore when you stuff a plus shaped sugar-subsitute down a ring decomposing pathway you get formaldehyde and methanol, the key ingredients in embalming fluids. Just say no to aspartame. 