INTRODUCTION. Gastroesophageal reflux, also called acid reflux, occurs when the stomach contents back up (reflux) into the esophagus or mouth. Acid reflux is a normal process that occurs in healthy infants, children, and adults. Most episodes are brief and do not cause bothersome symptoms or problems.
How often to replace: 1  Mascara: every 3-6 months (which means youâll have to throw it away before itâs used upâ¦ the same goes for a lot of these products, probably) 2  Eye shadow: every 6 months. 3  Eyeliner (liquid): every 3-4 months. 4  Eyeliner (pencil): every 6-12 months.
Dermatologists say a messy makeup kit can lead to infection, allergic reaction, and even acne. here is the shelf life for the following: * Mascara: Mascara lasts 3-6 months and is the most prone of all makeup to harbor bacteria because the wand is constantly being dipped. A general rule is anything that is a liquid has a shorter life. * Concealer: Has a life of about 18 months due to emulsion (the ingredients will begin to separate).