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.
Uses[edit] The sodium salt of pyroglutamic acid â known either as sodium pyroglutamate, sodium PCA, or sodium pidolate â is used for dry skin and hair products, as it is a humectant. It has low toxicity and is not a skin irritant, but its use in products is limited by a high price. L-pyroglutamic acid is sold online as a dietary supplement. Magnesium pidolate, the magnesium salt of pyroglutamic acid, is a mineral supplement.