Verkhratsky, A., Arranz, A
Clinical trials show no increased risk of heart attack or stroke
Sun damage from years outdoors
The subcutaneous tissuethe fatty layer just beneath your skincontains many tiny capillaries that can bleed when punctured
The Leyden 2002 facial-cream trial reported skin density, thickness, fine lines, and laxity changes at 12 weeks
If you are into chemistry (if not, we understand, just skip this paragraph), the reason is that electrolytes (you know, the Na+ and Cl- ions) screen the electrostatic repulsion between the head groups of ionic surfactants and thus support the formation of long shaped micelles (instead of spherical ones) that entangle like spaghetti, and viola, a gel is formed