Definition Guide for skin and hair care terms. A to Z Glossary of hair & skin ingredients with meaningful results. Updated regularly.
- Ganoderma Lucidum is also called Reishi Extract. It comes from a mushroom with polysaccharides. These are responsible for the skin’s natural ability to hydrate and retain water. Ganoderma Lucidum promotes cell regeneration while reducing skin inflammation, puffiness, and wrinkles. It is known as the mushroom of immorality because of its’ anti-aging properties, beauty, skin, hair and overall health benefits. See Reishi Extract.
- Geranium Extract
- Geranium Extract makes skin glow and heals inflammatory skin conditions and topical ingredient induced irritation. It also contains a fatty acid profile that promotes healthy skin cells and reduce wrinkles .
- Ginkgo Biloba
- A natural ingredient from the maidenhair tree. Ginkgo Biloba increases blood flow to the scalp and can accelerate hair growth rates. Better blood flow means more nutrients are available for the hair production process.
- Glycerin is a natural humectant for both skin and hair. It helps hair to retain moisture. This is particularly important for thirsty coarse and curly hair. These hair types have a wider diameter, which means more surface to lose moisture and feel dry.
- Goji Berry
- Goji berry (Lycium Barbarum Fruit Extract) is an antioxidant that softens the skin. It is considered a superfruit and has long been used in traditional medicine practice.
- Gotu Kola
- Gotu Kola is especially good at improving elasticity and reduce sagging. It boosts antioxidant activity, strengthenings the skin and increases blood circulation.
- Glycolic Acid
- (AHA) Glycolic Acid (AHA) exfoliates by loosening the “glue” that adheres dry, dead skin to healthy skin, and then dissolves away the dead skin. It is a superior form of exfoliation for mature skin because there is no rubbing or pulling the skin. There is also little to no peeling or sloughing sections, and limited redness or irritation after use. Skin is brighter, younger, softer, with few lines and wrinkles, and it glows like younger skin. In-office micro-needling with Glycolic Acid greatly reduces acne scars.  Glycolic Acid also promotes collagen production. Several at-home Glycolic Peel products are available. Read more about Glycolic Acid here.
- Grape Seed Extract
- Grape Seed Extract prevents breakouts and calms existing breakouts. Contains very high antioxidant levels to protect the skin against UV damage.
- Grapeseed Oil
- Grapeseed Oil is highly beneficial for both skin and hair. For hair, it is an outstanding moisturizer for brittle and dry hair. It soothes dry scalp skin. Regular Grapeseed oil scalp massages remove follicle-shrinking DHT. DHT is a hormone that accumulates on the scalp and can cause hair loss. Grapeseed Oil is nourishing to the skin and contains building blocks for collagen production. High in Polyphenols, Vitamins C, D, E and Omega 6, it treats dry skin, wrinkles, discoloration, and aging. Choosing an organic product is especially important when selecting a grapeseed oil.
- Green Tea
- Green Tea is used topically and ingested. Green Tea feeds and moisturizes the skin, calms irritation and is an excellent antioxidant. Topical Green Tea application can calm the irritation that aggressive topicals such as Retinol cause. Drinking green tea has anti-aging benefits from polyphenols. It can reduce sun damage, decrease collagen breakdown and increase cell regeneration. Green tea contains polyphenols that soothe skin while providing antioxidants. Polyphenols may improve sun-damaged skin.  High in Epigallocatechin gallate (EGCG), green tea is a major player in skin health and appearance. EGCG is the potent antioxidant from green tea. It protects against environmental damage and neutralizes free radicals that prematurely age skin. Research shows EGCG reactivates dying skin cells. This shows promise for repairing sun damage and scar healing.  Topical application of Green Tea reduces hair fall. Dermato-trichologists use green tea as an excellent scalp massage as it nourishes the scalp, soothes inflammation and dandruff. The Polyphenols in green tea are good for hair roots and follicles, promoting hair regrowth. 
- Gua Sha
- Gua Sha is an ancient alternative remedy practice. Gua Sha stimulates skin renewal with lymphatic drainage and increased blood flow. Improved blood flow assists in collagen production. Gua Sha facial tools are designed to improve circulation by gently scraping the skin. This non-invasive treatment can reduce puffiness and inflammation. Gua Sha tools are often made of gemstones like Brazilian Jade and Rose Quartz.
- Boukhatem, Mohamed Nadjib et al. “Rose geranium essential oil as a source of new and safe anti-inflammatory drugs.” The Libyan journal of medicine vol. 8 22520. 7 Oct. 2013, doi:10.3402/ljm.v8i0.22520
- Radulović, Niko & Dekic, Milan & Stojanović-Radić, Zorica & Palic, Radosav. (2011). Chemical composition and antimicrobial activity of the essential oils of Geranium columbinum L. and G. lucidum L. (Geraniaceae). Turkish Journal of Chemistry. 35. 499-512. 10.3906/kim-1002-43.
- J Cosmet Dermatol.2017 Dec;16(4):454-459. doi: 10.1111/jocd.12377. Epub 2017 Oct 26.
Efficacy of microneedling with 70% glycolic acid peel vs microneedling alone in treatment of atrophic acne scars- A randomized controlled trial.
- International Journal of Cosmetic Science, February 2015, pages 456-463
- Journal of Pharmacol Exp Ther 2003 306: 29-34
- Yesudian, Patrick. “Can beverages grow hair on bald heads?.” International journal of trichology vol. 4,1 (2012): 1-2. doi:10.4103/0974-7753.9607