Skin & Hair Glossary of ingredients & terms. Defining how to best use hair & skin ingredients. Updated regularly.
- Panthenol (Vitamin B5)
- Panthenol is moisture-binding and soothing, It makes hair look healthier by boosting shine and plumping the hair shaft.
- Parabens are common preservatives in food and cosmetics to prevent bacteria and fungus formation.
- Pea Peptides
- Pea Peptides aid the structure of the hair. Pea Peptides minimize UV damage to the scalp. Pea Peptides contain Lysine, important for hair growth promotion at the follicular level and sebum production regulation, which decreases with age. Pea Peptides absorb easily.
- Peppermint Oil an essential oil that provides an invigorating scent and anti-bacterial properties. Combined with Jojoba it makes a stimulating scalp massage oil. Add a drop Peppermint oil to shampoo for an invigorating, deep cleanse to hair and scalp.
- Peptides are protein fragments that promote collagen growth and repair skin and in some cases hair. Various peptides promote different repair functions. Peptides occur naturally in the body and are contained in skin products to serve as a catalyst or bolster the impact of other active ingredients
- Photoaging, Photodamage
- The changes that occur to the skin due to extended exposure to the sun. This includes wrinkles and age spots.
- Phototherapy includes light-based treatment for acne, wrinkles, and various skin conditions. It includes specific nanometers of colored light to treat different issues. Some include Red, blue, green and yellow light therapy. changes that occur to the skin due after extended exposure to the sun. This includes wrinkles and age spots.
- Phytonadione is Vitamin K. Vitamin K helps with blood coagulation and circulation. When applied topically, it improves the appearance of under-eye circles. A study in the Journal of Cosmetic Dermatology showed topical Vitamin K works best when paired with other ingredients such as retinol, Vitamins C, E, and the Bs. 
- Pineapple Fruit Extract
- Pineapple Fruit contains extracts that are effective natural exfoliants to slough off dead cells on the surface of the skin while imparting soothing skin benefits.
- Pine Bark
- Bark improves skin hydration and elasticity while decreasing skin fatigue.
- Plant Stem Cells
- Plant stem cells replace damaged cells in the skin. They increase collagen and reduce inflammation.
- Platinum can reach skin layers other ingredients cannot. It binds to peptide ingredients to penetrate into the deepest skin layers. It is where sagging can be repaired by peptides boosting collagen production.
- Polyphenols are the beneficial anti-aging part of green tea. It reduces sun damage, decreases collagen breakdown and increases cell regeneration. About two cups of green tea a day give optimal Polyphenols, about 240mg.
- Pomegranate Sterols is a safe, natural pomegranate based skincare ingredient. Those juicy, jewel-like seeds are arils. Arils are packed with antioxidants, minerals, vitamins A, C, K, and E plus folic acid. Pomegranates contain three times the antioxidants of wine or green tea.  Pomegranate Sterol is made by extracting the arils juice. It increases skin barrier formation and improves skin hydration. Testing shows Pomegranate Sterols holds double its’ weight in water. Meanwhile, it delivers impressive collagen-building results.
- Probiotics are beneficial strains of live bacteria taken in through foods, supplements or applied topically. These improve gut and skin health.
- Propolis is a bee product of saliva and beeswax, sometimes called bee glue. It fights infections and heals wounds. Propolis helps keep skin at its’ best. It causes a slight temporary skin plumping action. It is an increasingly common ingredient in skincare. If you are allergic to bee products, take note.
- Pycnogenol is a plant extract from pine bark. Topical application enhances skin hydration and elasticity. It binds collagen and elastin, preserving key skin proteins.
- Propylene glycol, polypropylene glycols
- Man-made alcohols that attract and bind water. Humectants.
- Protein is a building block for hair and skin.
- The drooping of a body part. Often refers to drooping eyelids or breasts.
- Mitsuishi, T. , Shimoda, T. , Mitsui, Y. , Kuriyama, Y. and Kawana, S. (2004), The effects of topical application of phytonadione, retinol and vitamins C and E on infraorbital dark circles and wrinkles of the lower eyelids. Journal of Cosmetic Dermatology, 3: 73-75. doi:10.1111/j.1473-2130.2004.00070.x
- Antioxidant Activity of Pomegranate Juice and Its Relationship with Phenolic Composition and Processing María I. Gil,†, Francisco A. Tomás-Barberán,†, Betty Hess-Pierce,‡, Deirdre M. Holcroft,§ and, and Adel A. Kader*, Journal of Agricultural and Food Chemistry 2000 48 (10)