“The Better Vitamin C” Ester C® Plus 500 mg is a unique formula utilizing a premium patented, non-acidic, form of vitamin C, Ester C® which may be easier for your body to absorb. This proprietary formula is an exclusive product to Solgar and contains additional natural plant bioflavonoids that naturally accompany Vitamin C in fruits and vegetables. Ester C itself is also gentle on the stomach compared to traditional forms of vitamin C, and so is less likely to irritate, making this product a good choice for everyone. Once taken Ester C® is also retained by your immune cells for longer than regular Vitamin C, giving you superior immune support. Vitamin C, a water soluble vitamin that helps fight free radicals and to maintain a healthy immune system. It has multiple benefits which supports optimal health, ranging from promoting healthy skin, reducing tiredness and fatigue and supporting healthy bones and teeth.