Most diet drinks contain Aspartame. There is nothing ‘tame‘ about this artificial sweetner. It is a toxic chemical. One ingredient is wood alcohol, when the temperature exceeds 30°C, is converted to Formaldehyde and then Formic Acid, which causes metabolic acidosis. Commonly accepted core body temperature is 37°C. Formaldehyde is grouped in the same class as poisons as Cyanide and Arsenic, deadly toxins. The only difference is Formaldehyde kills quietly and takes longer to do so. And as it does, it causes all sorts of neurological problems. In addition, it is marketed as a diet product, it is not one at all. In fact, it will casue you to gain weight because it causes food cravings. The major reputable supermarkets have now agreed to exclude it from their own brand products, including Asda, M&S and Sainsburys, but unfortunately still continue to sell other products that do. You can choose to have it or not, read the label and put it back on the shelf!