Page 249 - Cosmetology
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Pongamia pinnata extract. Can have anti-inflammatory properties.

                   poppy seeds. Can have analgesic properties when applied topically.

                   Poria cocos extract. Derived from a mushroom, this extract has antioxidant and anti-inflammatory
                   properties. Also known as Hoelen and Fu ling.

                   Porphyra umbilicalis. Form of seaweed. See algae.

                   Porphyridium cruentum. Type of red algae. See algae.

                   Porphyridium cruentum extract. This extract is derived from a type of red algae. There is research
                   showing components of red algae contain the omega-3 fatty acid eicosapentaenoic, the omega-6 fatty acid
                   arachidonic acid, and other skin-friendly ingredients such as polysaccharides. Whether or not the entire red
                   algae extract provides benefit on skin is not known.

                   Portulaca Oleracea extract. May have anti-inflammatory or analgesic properties.

                   potassium. Important in diet and present in such fruits and bananas and citrus. It is also an earth mineral
                   that has absorbent properties and some disinfecting properties, but can also be a skin irritant.

                   potassium cetyl phosphate. Used as a detergent cleansing agent. See surfactant.

                   potassium hydroxide. Also known as lye, it's a highly alkaline ingredient used in small amounts in
                   cosmetics to modulate the pH of a product. It is also used as a cleansing agent in some cleansers. In higher
                   concentrations it is a significant skin irritant.

                   potassium myristate. Detergent cleansing agent that is a constituent of soap; it can be drying and
                   sensitizing for some skin types. See surfactant.

                   potassium thiocyanate. Chemically, a salt that can be a potent skin irritant, though it can also have
                   antibacterial properties for skin.

                   Potentilla erecta root extract. Can have anti-inflammatory properties, though there is minimal research
                   showing this to be the case.

                   Poterium officinale root extract. Derived from the garden burnet plant. See Sanguisorba officinalis.

                   PPG-12 buteth-16. Versatile ingredient composed of several non-volatile alcohols. Functions as a skin-
                   conditioning agent, emulsifier, solvent, and surfactant.

                   PPG-14 butyl ether. Used as a hair- and skin-conditioning agent.

                   PPG-2 myristyl ether propionate. A mixture of glycols and fatty alcohols used as a skin-conditioning agent
                   and, in some cases, as a thickening agent.

                   pregnenolone acetate. Precursor to other hormones, it can affect levels of progesterone and estrogen in
                   the body when taken orally. When applied to skin it may work as a water-binding agent. There is no
                   information about whether absorption of this through skin is possible.

                   preservatives. Substances used in cosmetics to prevent bacterial and microbial contamination of products.
                   While there is definitely a risk of irritation from these types of ingredients, the risk to skin and eyes from
                   using a contaminated product is considered by many scientists to be even greater.

                   prickly pear extract. There is no research showing it to be effective for skin when applied topically, though
                   it may have water-binding properties.

                   primrose. See Primula veris extract.

                   Primula veris extract. Derived from primrose or cowslip plants. It has no known benefit for skin, though it
                   does contain flavones and may have antioxidant properties.
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