Fruit acid in combination with the phyllanthus emblica plant act to regulate melanin production and therefore smooth out pigment formation. Green tea has a calming effect. 10-week cure with 5 ampules each for better distribution. The first results are visible after 5 weeks. Tip: In order to prevent new pigment irregularities from occurring, it is recommended to protect hands during the day with KOH Essential Hand Nourisher (SPF 15). Use: apply a drop of the Serum to the areas you wish to treat in the evenings and leave to work overnight. 10-week cure: one ampule is enough for 2 weeks.