Vaadi Herbals Retinol 0.4% Face Serum is a powerful anti-ageing formulation that used plant derived Squalene as its base. This serum nourishes skin and protects retinol from oxidation. Retinol or Vitamin A is proven to fade fine lines wrinkles and even skin tone and smoothen skin. It starts showing results in most cases in 4-6 weeks when used regularly.