Ellipses. 1  An ellipsis is a set of three periods ( . . . ) indicating an omission. Each period should have a single space on either side, except when adjacent to a quotation mark, in which case there should be no space. 2  In informal writing, an ellipsis can be used to represent a trailing off of thought.
PCA SkinÂ® products that focus on a condition and are used with one another ensure improvements in your skin's look, texture and feel. PCAâs broad spectrum of SPF protection products are recommended by the Skin Cancer Foundation.
Here is how to use a prescription retinol product (with the active ingredient * tretinoin) with your daily skin-care routine: 1  Cleanse, tone, and exfoliate your skin with your AHA or BHA product as usual.2  Next, apply the prescription product.t is considered a cosmetic ingredient and found only in non-prescription products (mostly skin care). Retinol can be broken down to become other forms of vitamin A that are found in skin-care products or prescription products.