Humectants

Ammonium lactate is a combination of lactic acid and ammonium hydroxide. It's commonly used as a moisturizer to treat dry, scaly, itchy skin conditions, such as ichthyosis vulgaris and xerosis. The lactic acid component helps to exfoliate dead skin cells, while the ammonium hydroxide component helps to moisturize and soften the skin. It's available in various forms, including lotions and creams, and typically requires a doctor's prescription for use.

Glycerin, also known as glycerol, is a colorless, odorless, viscous liquid that is sweet-tasting and non-toxic. It is a type of alcohol with three hydroxyl (OH) groups, and is commonly used in various industries such as pharmaceuticals, cosmetics, food, and personal care products. Glycerin has numerous applications, including as a solvent, humectant, emollient, and lubricant, among others. It can be derived from both plant and animal sources, and is also produced as a byproduct of soap and biodiesel manufacturing.