Best For Skin Types
Oily, Combination
Addresses
Usage Frequency
Daily
What Is Quassia Amara Wood Extract?
Quassia amara wood extract comes from the heartwood of the quassia tree, native to South America. It is rich in quassinoids—compounds with antimicrobial and astringent properties that have been used in traditional medicine and folk remedies for centuries.
In skincare formulations, quassia amara wood extract is primarily employed as a denaturant (to render ethanol non-drinkable in cosmetic products), a skin conditioning agent, and a natural preservative tonic. Its astringent nature may offer mild tightening or toning sensations on the skin.
How It Works
The active compounds in quassia amara—chiefly quassinoids—possess antimicrobial and astringent qualities. When applied to skin, these compounds may help tighten pores and reduce the appearance of oiliness through mild protein precipitation on the skin surface, similar to traditional astringent ingredients.
Its antimicrobial action may also support the preservation of cosmetic formulations, reducing reliance on synthetic preservatives in some product systems.
Clinical Evidence & References
Scientific evidence specifically evaluating quassia amara wood extract in skincare is limited. Most support for its use derives from its traditional applications and in vitro antimicrobial studies rather than controlled human trials on skin efficacy.
While the ingredient's antimicrobial properties are documented in herbal medicine literature, robust clinical data demonstrating measurable benefits to human skin—such as pore size reduction or oil control—remain sparse. It is generally regarded as a supportive ingredient rather than a primary active.
How to Use
Quassia amara wood extract is typically found in formulations at low concentrations and does not require special application instructions. Use products containing this ingredient as directed by the manufacturer. If you are new to astringent-type ingredients, introduce them gradually to assess skin tolerance, especially if your skin is sensitive or prone to dryness.
Safety & Precautions
Frequently Asked Questions
From the Clinic
Not sure what your skin actually needs?
Two minutes, a few questions, and we’ll point you at what matters — no guesswork.
Take the skin quizRelated Ingredients
Pterocarpus Soyauxii Wood Extract
A plant-derived astringent that helps to refine skin texture and tone appearance
Pyrus Malus Fruit
Apple fruit extract with astringent properties traditionally used in skincare
Pyrus Sorbus Bud Extract
A plant extract traditionally valued for its astringent and skin-conditioning properties
Quercus Acutissima Fruit Extract
Plant-derived astringent that helps refine skin texture and minimise pore appearance
Quercus Alba Bark Extract
A plant extract with astringent and purifying properties from North American white oak bark
Quercus Robur Bark Extract
A tannin-rich plant extract with astringent and traditionally purifying properties
Learn More About Skincare Ingredients
Explore our comprehensive ingredient glossary to understand what's in your products.
Browse All IngredientsShop Our Products
Find professional skincare solutions at Skintique.