Vitamins like A, C, and E are powerful antioxidants that help protect the skin from oxidative stress and free radical damage. Neem and certain vitamins, such as vitamin E and niacinamide (vitamin B3), possess anti-inflammatory properties that help soothe irritated and inflamed skin. Vitamins C and niacinamide (vitamin B3) are known for their skin-brightening properties and ability to reduce hyperpigmentation. Both neem and certain vitamins, such as vitamin E, are known for their skin-regenerating properties, which aid in the healing and repair of scars and wounds.