Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. For the past few ...

Potassium benzoate is a preservative commonly added to food, beauty, and skin care products to increase their shelf life. While this compound is approved for use in many countries, it has come under ...

From hyaluronic, glycolic, and salicylic to azelaic, hypochlorous and polyhydroxy, acids have taken over our collective skincare routines and there’s no sign of slowing down. Lurking under the radar ...