Clausena Lansium Seed Oil: 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 Clausena Lansium Seed Oil?

Clausena lansium seed oil is a plant based oil pressed from the seeds of the wampee fruit tree, a citrus relative native to Southeast Asia. The pale yellow oil contains a mix of fatty acids, mainly oleic, linoleic and palmitic acids, along with natural antioxidants such as tocopherols. Traditional communities in China and Vietnam have long used various parts of the tree for skin soothing balms and hair treatments. Modern cosmetic chemists took note of its light texture and antimicrobial traits in the early 2000s and began refining the seed oil for skincare labs.

Production starts with washing and drying the leftover seeds from fruit processing. The seeds are then cold pressed or expeller pressed to obtain the crude oil, which is filtered to remove impurities. A mild deodorization step helps create a neutral scent oil that blends easily with fragrances. You will most often spot Clausena lansium seed oil in lightweight facial oils, gel cream moisturizers, calming masks, blemish control serums and leave on hand treatments where a fast absorbing emollient with added protection against microbes is desired.

Clausena Lansium Seed Oil’s Cosmetic Benefits/Uses

Below are the key ways this ingredient supports healthy looking skin

  • Antimicrobial. Helps limit the growth of odor causing or blemish triggering microbes on the skin, which can keep formulas fresher for longer while supporting a clearer complexion.
  • Emollient. Softens and smooths the skin surface by filling in microscopic gaps between cells, boosting comfort and reducing the appearance of flakiness without leaving a heavy residue.

Who Can Use Clausena Lansium Seed Oil

This lightweight plant oil generally suits normal, dry and combination skin thanks to its smooth feel and quick absorption. Oily or very acne-prone skin can usually tolerate it as well because it leaves little greasy residue, though anyone who reacts poorly to oleic-rich oils may prefer to apply it sparingly or choose a different emollient.

The ingredient is entirely plant derived so it aligns with vegan and vegetarian lifestyles without reservation. No animal byproducts are used at any stage of cultivation or extraction.

Current research shows no specific hazards for pregnant or breastfeeding women when the oil is used topically in standard cosmetic concentrations. Still, this is not medical advice and anyone who is expecting or nursing should show the product to a healthcare professional before adding it to a routine, just to be safe.

Clausena lansium seed oil is not known to cause photosensitivity so it can be used both day and night without raising the skin’s sensitivity to sunlight.

Potential Side Effects/Adverse Reactions

Responses to any skincare ingredient differ from person to person. The effects listed below are possible yet unlikely when the oil is properly formulated and used as intended.

  • Skin irritation such as stinging or redness in individuals with very sensitive skin
  • Allergic contact dermatitis in those allergic to citrus relatives or specific fatty acids
  • Temporary pore congestion for users who are highly reactive to oleic-dominant oils
  • Mild eye irritation if applied too close to the lash line

If you notice any of these issues stop using the product and seek advice from a medical professional.

Comedogenic Rating

Rating: 2/5

The oil’s fatty acid profile leans toward oleic acid with smaller amounts of linoleic and palmitic acids. Oleic acid can cause clogged pores for a small subset of users while linoleic tends to keep pores clear, so the overall risk lands in the low-to-moderate range rather than zero. Its light consistency and rapid absorption further reduce the chance of buildup compared with heavier oils rich in stearic or lauric acids.

Most people prone to acne can use it without issues though exceptionally sensitive or very oily skin types may prefer to monitor how their skin responds.

Refinement level matters: highly refined oil that is free of seed debris and waxes is less likely to cause congestion than minimally filtered versions found in some DIY suppliers.

Summary

Clausena lansium seed oil serves mainly as an emollient that softens skin and as a mild antimicrobial that helps keep both formula and complexion fresh. These effects come from its balanced mix of fatty acids that reinforce the skin barrier and its naturally occurring antioxidants that discourage bacterial growth.

It remains a niche ingredient, popular within indie clean beauty brands but still rare in mainstream lines, which makes it a pleasant discovery for those hunting for alternatives to well known plant oils.

Topical use is considered very safe with no major red flags reported in current research. As with any new cosmetic ingredient it is smart to run a small patch test first to rule out personal sensitivities before full application.

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