Plus, it's free of sugar, gluten, dairy, soy, and other allergens, so you can trust that it won't cause any adverse effects. Protecting your cells against the effects of free radical damage, vitamin C tablets help the body ward off the effects of oxidative stress. These Vitamin C supplements are also one of the best antioxidants for fighting free radicals. Vitamin C zinc tablets support a healthy immune system. This vitamin c product is not intended to diagnose, treat, cure, or prevent any disease.