Casearia Sylvestris Extract: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: June 24, 2025
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All information on this page is verified using publicly available nomenclature standards and reference materials from The Personal Care Products Council (PCPC) and the European Commission's CosIng database. Our analyses are based on technical data from these sources to ensure accuracy and reliability.

What Is Casearia Sylvestris Extract?

Casearia Sylvestris Extract comes from the whole Casearia sylvestris plant, a small tree native to Central and South America and part of the Samydaceae family. Traditionally valued in folk remedies, the plant drew attention for its rich mix of flavonoids, terpenoids and phenolic acids, compounds known for their ability to defend the skin from everyday stressors. To create the cosmetic grade extract, harvested plant material is washed, dried and ground before being soaked in a gentle solvent such as water or glycerin. The liquid is then filtered and concentrated, yielding a stable solution that can be blended into skincare formulas. You will most often see Casearia Sylvestris Extract in serums, daily moisturizers, soothing masks and products aimed at protecting skin from pollution and other environmental aggressors.

Casearia Sylvestris Extract’s Cosmetic Benefits/Uses

This ingredient is prized for one main role in skincare.

As a skin protecting agent, Casearia Sylvestris Extract helps shield the skin surface from damage caused by pollution, UV exposure and other stressors that can lead to dullness or early signs of aging. By adding a natural barrier of antioxidant support, it helps keep the complexion looking healthy and resilient.

Who Can Use Casearia Sylvestris Extract

Casearia Sylvestris Extract is gentle enough for most skin types, including normal, dry, oily, combination and even sensitive skin thanks to its soothing antioxidant profile. Those with extremely reactive or broken skin barriers should still proceed with caution because any botanical extract can occasionally trigger irritation in compromised skin.

The extract is plant derived and processed without animal by-products, making it suitable for both vegans and vegetarians.

There are no known concerns for pregnant or breastfeeding women when the ingredient is used topically at the low levels found in finished cosmetics. This is not medical advice and anyone who is pregnant or nursing should have a quick chat with a healthcare provider before introducing new skincare products, just to be safe.

Casearia Sylvestris Extract does not increase photosensitivity, so regular daytime use is fine when paired with a daily sunscreen. It also plays well with most common skincare actives, including niacinamide, hyaluronic acid and non-sensitizing vitamin C derivatives.

Potential Side Effects/Adverse Reactions

Side effects and reactions to topical Casearia Sylvestris Extract vary from person to person. The points below outline potential issues yet they are uncommon when the ingredient is properly formulated and used as directed.

  • Mild redness or warmth at the application site
  • Itching or tingling in sensitive skin
  • Dry patches if the product also contains high levels of alcohol
  • Allergic contact dermatitis in individuals allergic to the Casearia plant family

If any of these reactions occur, stop using the product and seek guidance from a healthcare professional if symptoms do not quickly subside.

Comedogenic Rating

Rating: 1/5

Casearia Sylvestris Extract is largely composed of lightweight polyphenols and contains little to no occlusive lipids, so it is very unlikely to block pores. A trace amount of residual plant oil may remain after extraction which is why it is not rated a perfect zero, yet the overall clogging risk is still considered low.

This makes the extract generally suitable for skin that is prone to acne or breakouts.

Remember that the finished product formula matters more than the single ingredient. If paired with heavy butters or thick occlusives, the overall comedogenicity of the product can rise even though the extract itself is low risk.

Summary

Casearia Sylvestris Extract serves mainly as a skin protecting antioxidant, fending off free radicals from pollution UV exposure and other daily stressors. Its natural blend of flavonoids terpenoids and phenolic acids helps maintain a calm resilient complexion.

While not yet as well known as powerhouse actives like vitamin C, the extract is quietly gaining popularity among brands looking for gentle plant based protective agents.

Current data suggests a low likelihood of irritation or pore clogging at typical cosmetic levels, making it safe for most users. Still, patch testing any new product containing this ingredient is a smart move to ensure personal compatibility.

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