To treat skin darkening from sunburn and a dark forehead, daily use of a broad-spectrum sunscreen (SPF 30 or higher) is essential. You can use topical creams containing active ingredients like Vitamin C, Niacinamide, Kojic acid, or Azelaic acid to help brighten the skin. For the forehead, a mild Retinol or Glycolic acid cream at night can promote even skin tone. For under-eye circles, look for eye creams containing Caffeine or Hyaluronic acid to plump and brighten the area. Please patch-test new products first to avoid irritation, and consult a dermatologist if you do not see improvement.

Neither serum is universally better as they serve different, complementary roles. Vitamin C (L-ascorbic acid) is ideal for brightening skin, fading dark spots, and boosting collagen. It is best used in the morning to protect against daily environmental damage. Vitamin E (tocopherol) is a rich moisturiser that strengthens the skin barrier, heals dry patches, and calms inflammation. If your goal is anti-ageing and brightening, choose Vitamin C. If you need deep hydration and healing, choose Vitamin E. For the best results, look for a product that combines both, as Vitamin E actually boosts the stability and effectiveness of Vitamin C.