Pregnancy and hormone therapy as well as stress can cause pigmentation marks, as can acne, sun exposure and skin-trauma. SVR's Clairial range helps you tackle these dark patches:STEP 1: Clairial Serum to soften and neutralise existing marks with highly concentrated depigmenting actives and vitamin C, for visible results in just two weeks. STEP 2: Use Clairial SPF 50+ every morning. This step is essential for lasting corrective action. Why? The sun as well as UV screens stimulate melanocytes (melanin-forming cells) so shielding your skin with very high protection is essential to prevent further formation of pigmentaton marks through excess melanin production and to keep your skin safe. Clairial Serum is the depigmenting serum most prescribed by dermatologists in France.