Propylene Glycol- Along with other glycols and glycerol, propylene glycol is a humectant (hydrating) and delivery ingredient.
Proprioception- The kinesthetic sense in which sensory receptors receive information about rate of movement, contraction, tension, position, and stretch of tissue. This information is processed in the central nervous system, which sends motor impulses back to muscle, causing it to contract, relax, restore, or change position.
Propyl Gallate- An ester of gallic acid that is an antioxidant, and helps protect fats and oils used in cosmetics products from becoming rancid.
Propolis- Brownish, resinous material that is collected by bees and used to construct the hive.