Hair follicle: A skin organ in a mammal that produces hair
Hormone: A signalling molecule secreted into the blood stream which carries it to a distant target cell
Hydrophilic: Water-loving; easily dissolves in water
Hydrophobic: Water-fearing; won’t dissolve in water
Lipophilic: Lipid/fat-loving; won’t dissolve in water
Melanin: Pigment found in skin, hair and eyes
Micelle: A highly-organized spherical form of surfactant molecules found in a liquid
Oestrogen: A female steroid sex hormone secreted by the ovary; is responsible for female sexual development.
Paraben: A class of compounds commonly used as preservatives in the cosmetic and pharmaceutical industries
Proinflammatory mediators: Initiators of inflammation.
Sebaceous gland: A small gland in the skin which secretes sebum into the hair follicles
Sebum: Naturally produced oil from the sebaceous gland
Statistical significance: A result which is sufficiently unlikely to have occurred by chance; levels of significance can vary.
Strain: A subset of organisms within a given species which are slightly different from similar groups in said species.
Surfactant: A substance that can reduce the surface tension of a liquid which it is dissolved in.