Enhanced Vitamin C - Solgar Ester-C Plus 500 mg is a unique formula containing an enhanced, patented, non-acidic form of vitamin C, Ester C, which facilitates absorption into the body. This patented formula is a unique Solgar product that also includes natural plant bioflavonoids that accompany vitamin C in fruits and vegetables. Ester-C is also gentler on the stomach than traditional forms of vitamin C, so it does not tend to cause irritation, making this product a good choice for everyone.In addition, Ester-C stays in immune cells longer than normal vitamin C, supporting the immune system. Vitamin C is a water-soluble vitamin that helps fight free radicals and support a healthy immune system. It provides multiple benefits for optimal health, such as promoting healthy skin, bones and teeth and reducing tiredness and fatigue. Ester-C Plus 500 mg from Solgar provides all the health benefits of this enhanced vitamin C in convenient vegetarian capsules taken 1 to 3 times daily.