What Glycerin Actually Does to Your Skin
Glycerin is a humectant. That single fact explains everything. It pulls water from the air and from the deeper layers of your skin up into the outermost layer, the stratum corneum, and holds it there. A 2016 study published in the journal Skin Pharmacology and Physiology confirmed that glycerin outperformed several synthetic humectants in maintaining skin hydration over a 24-hour period. Your skin does not care that the bottle cost nineteen rupees at a medical store. The mechanism works the same way regardless.
