Machilus Thunbergii Bark 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: July 1, 2025
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We verify all information on this page using publicly available nomenclature standards from The Personal Care Products Council (PCPC), the European Commission's CosIng database and documentation provided directly by ingredient manufacturers. Our analysis is based on technical data from these sources to ensure accuracy and reliability.

What Is Machilus Thunbergii Bark Extract?

Machilus Thunbergii Bark Extract is a plant derived ingredient obtained from the bark of the Machilus thunbergii tree, a member of the laurel family native to East Asia. The bark contains polyphenols, flavonoids and other naturally occurring compounds that are valued for their soothing and protective qualities. Traditionally the tree was used in local folk preparations for its calming effects on skin, and cosmetic formulators took note of these properties in the late twentieth century as the demand for gentle plant based ingredients grew. The extract is usually produced by drying and milling the bark, then soaking it in a water or water-glycol mixture to pull out its beneficial molecules. After filtration and concentration it is standardized for consistent quality and added to finished products. You are most likely to find Machilus Thunbergii Bark Extract in moisturizers, sheet masks, calming face creams, after-sun lotions and anti-aging serums where it supports skin comfort and resilience.

Machilus Thunbergii Bark Extract’s Cosmetic Benefits/Uses

In formulas this extract is prized for one key role:

Skin conditioning: Machilus Thunbergii Bark Extract helps keep skin soft, smooth and healthy looking. By supplying antioxidant compounds and lightweight sugars it supports the skin barrier, reduces the feeling of tightness and leaves the complexion feeling calm and refreshed.

Who Can Use Machilus Thunbergii Bark Extract

This bark extract is gentle enough for most skin types including dry, normal, combination and oily skin. Its light soothing nature makes it especially welcome for sensitive or easily flushed complexions because it does not add heavy oils or known irritants. Extremely reactive skin or those with a known allergy to laurel family plants should proceed carefully since cross sensitivities, while rare, can occur.

The ingredient is plant derived and processed without animal by-products so it is suitable for both vegans and vegetarians.

There is no specific evidence that Machilus Thunbergii Bark Extract is unsafe for people who are pregnant or breastfeeding. That said this is not medical advice and anyone who is expecting or nursing should show any skincare product to a healthcare professional to be sure it fits their personal situation.

The extract is not known to cause photosensitivity, meaning it will not make skin more prone to sunburn. Standard daily sun protection is still advised as part of a good routine.

Potential Side Effects/Adverse Reactions

Side effects from topical use of Machilus Thunbergii Bark Extract can vary from person to person. The points below outline potential reactions, yet most users will not notice any problems when the ingredient is included at customary levels in a well-made product.

  • Mild redness or warmth shortly after application
  • Itching or tingling on very sensitive skin
  • Allergic contact dermatitis in individuals allergic to laurel family plants
  • Temporary stinging if applied to compromised or freshly exfoliated skin

If irritation or any other unwanted reaction occurs discontinue use and seek advice from a qualified healthcare provider.

Comedogenic Rating

Rating: 0-1 out of 5.

Machilus Thunbergii Bark Extract is composed mainly of water soluble polyphenols, sugars and trace minerals, none of which are known to clog pores. It is typically used at low levels and introduces no heavy oils or waxes into a formula, keeping its pore blocking potential at the very bottom of the scale.

Thanks to this low rating the extract is considered suitable for people who are prone to acne or frequent breakouts.

Keep in mind that the overall pore friendliness of a product still depends on the entire ingredient list, not just this single extract.

Summary

Machilus Thunbergii Bark Extract serves mainly as a skin conditioning agent that helps skin stay soft, comfortable and resilient. Its blend of antioxidants and light humectant sugars supports the moisture barrier while calming minor redness for a refreshed feel.

While not yet as common as botanical staples like chamomile or green tea, the extract is slowly gaining attention among brands that favor gentle plant driven actives.

Current research and real world use point to a high level of safety with only occasional reports of sensitivity in those allergic to laurel family plants. Still, it is wise to carry out a quick patch test whenever you try a new product containing Machilus Thunbergii Bark Extract just to be sure it plays well with your skin.

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