The conditions for storing differ based on the product you've purchased. First, all The Ordinary products must be stored somewhere cool, away from direct sunlight. Second, if you've purchased any of The Ordinary Granactive Retinoids or The Ordinary Retinols, you'd have to refrigerate them after opening based on the directions written on the box. Lastly, for all the other products, the Ordinary brand suggests keeping them at room temperature, but you can refrigerate all but a few exceptions of The Ordinary products if that's how you'd prefer to store your products.