Tända Clear Pre-Treatment Gel To get the best results from your Tända Regenerate light therapy treatments, be sure to use the Pre-Treatment Serum first. Tanda Light Optimzed Anti Blemish Gel has a combination of amino acids, peptides and plant extracts which have been specifically designed for oily, blemish-prone skin. Calms, soothes and reduces redness for comfortable, healthy-looking skin. Tända topicals have been specially formulated to reduce light reflection and refraction on the skin and to facilitate optimal delivery of the light using proprietary technology. All starter kits come with a complimentary Pre-Treatment topical to get you started. Directions: Massage a small amount of serum onto face.