- This serum is an anti-wrinkle serum containing pure vitamin C known for its antioxidant properties. It contains hyaluronic acid to moisturize and fill fine lines. It also contains salicylic acid for pimples and other skin impurities. In addition, it contains thermal water to clean, purify, and exfoliate the skin. Apply to your face and neck once in the morning and once in the evening. Avoid contact with the eye area. This serum is suitable for all skin types including oily, dry, and sensitive.