The difference is how it feels on your skin. Active Ingredients: Salicylic Acid 3% Inactive Ingredients: Purified Water; Ammonium Lauryl Sulfate; Sodium Laureth Sulfate; Citric Acid; Cocamidopropyl Betaine; Lauryl Glucoside; PEG-150 Pentaerythrityl Tetrastearate; Coco-Glucoside; Glyceryl Oleate; Aleurites Moluccana Seed Oil; Zinc PCA; Panthenol; Rheum Palmatum Extract; Carthamus Tinctorius (Safflower) Flower Extract; Camellia Sinensis Leaf Extract; Propylene Glycol; Edetate Disodium Uses: Relieves and helps prevent recurrence of: scalp itching; irritation; redness; flaking; scaling due to psoriasis. Dermarest Psoriasis Medicated Shampoo PLUS Conditioner is now improved to provide even stronger relief from itching, and more effective control of crusting, scaling and flaking. Dermarest Psoriasis Shampoo's NEW one of a kind Scalp Repair Zinc Complex delivers maximum scalp-soothing relief with a unique combination of anti-oxidant and pro-vitamin B5 plus SEVEN conditioning ingredients that help: repair, protect and moisturize the scalp; relieve and control itching, scaling and flaking; thoroughly clean hair and restore shine and manageability without greasy texture; reduce damage caused by free radicals.