You may run across petrolatum as an ingredient in some of your favorite skin care products. Or, you may be familiar with petroleum jelly — a staple in many medicine cabinets. Moisturizers in beauty products fall into two categories: humectants (which draw moisture out of the air and into the skin) and occlusives. Occlusives trap water in the skin and prevent it from evaporating. Petrolatum is most definitely an occlusive, reducing water loss from the skin by as much as ninety-eight percent in laboratory tests! Other studies have pointed out that petrolatum can help fill in spaces between skin cells … Continue reading →