Solgar Ester-C Plus, Vitamin C, 500 Mg, 90 Capsules

Do you want to maintain a healthy immune system? Meet Ester-C. Unlike regular vitamin C such as Ascorbic Acid, Ester-C is a unique Vitamin C clinically shown to last longer inside your white blood cells (up to 24 hours!) and be non-acidic; gentle on sensitive stomachs.