Vitamin C is needed for a healthy immune system, healthy bones, teeth & gums as well as helping to maintain normal blood fat & cholesterol levels. Vitamin C, being one of the fragile water soluble nutrients, is highly unstable & easily destroyed by heat & light, & it is not always possible to be sure how much is taken in the diet. Our daily requirement for it is higher than for any other water soluble vitamin. However due to its acidity, vitamin C may cause slight gastric upset in those with very sensitive stomachs. We include Ester-C® in our range of vitamin C products as it is non-acidic (a neutral p H like distilled water) & hence gentle on the stomach. Evidence suggests that Ester-C® is also more bioavailable than ordinary vitamin C, producing higher vitamin C levels inside cells & furthermore, it appears to stay in the body for longer as less is excreted in the urine. Each 650mg Ester-C® tablet provides 500mg of vitamin C. Potent antioxidant nutrient. A Yellow coated tablet. Each tablet delivers: Ester-C® 650mg Vitamin C 500mg Tableted with: Cellulose, Calcium Carbonate, Hydroxypropyl Methylcellulose, Tablet Coating (Hydroxypropyl Methylcellulose, Cellulose, Colours: Titanium Dioxide & Iron Oxide), Silicon Dioxide, Stearic Acid, Magnesium Stearate. Disintegration Time Less than 1 hour. Suitable for vegetarians.