Alternanthera Sessilis 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 23, 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 Alternanthera Sessilis Extract?

Alternanthera Sessilis Extract comes from Alternanthera sessilis, a small leafy plant in the amaranth family that grows in warm, marshy areas across Asia, Africa and the Americas. The whole plant is harvested, then soaked in a mix of water and gentle solvents to pull out its useful compounds. These compounds include flavonoids, phenolic acids and natural sugars, which are known for helping calm oil and curb the growth of unwanted surface bacteria.

Traditional wellness practices have used this plant in herbal infusions and poultices for generations. As interest in plant based skincare grew in recent decades, formulators studied its oil balancing and purifying traits and began adding the extract to cosmetic products. Today you can spot Alternanthera Sessilis Extract in facial masks, daily cleansers, lightweight gels, leave-on spot treatments and scalp care tonics designed for oily skin or hair.

Alternanthera Sessilis Extract’s Cosmetic Benefits/Uses

In formulas aimed at fresh, clear skin this extract offers the following perks:

  • Anti-Sebum: Helps regulate excess oil so skin looks less shiny and pores feel fresher, which can improve makeup wear time and reduce the chance of clogged pores
  • Antimicrobial: Limits the growth of surface bacteria that can lead to breakouts or scalp irritation, supporting a cleaner, healthier looking complexion

Who Can Use Alternanthera Sessilis Extract

This plant extract suits most skin types but tends to shine for oily and combination skin thanks to its oil balancing talent. Normal skin can also enjoy its purifying touch while very dry or sensitive skin should start slowly, as the ingredient’s sebum reducing effect might feel a bit too astringent if your skin is already short on oil.

The extract is derived from a plant and no animal by products are involved in its harvest or processing, so it aligns with vegan and vegetarian values.

No specific warnings link Alternanthera Sessilis Extract to pregnancy or breastfeeding issues. That said, personal health situations differ. This content is not medical advice. If you are pregnant or nursing run any skincare formula by your doctor first to be safe.

The extract is not known to raise sun sensitivity, so it will not make skin burn faster. Daily sunscreen is still a smart habit for overall skin health.

Potential Side Effects/Adverse Reactions

Reactions to topical Alternanthera Sessilis Extract differ from person to person. The effects listed below are only potential issues and are unlikely for most users when the ingredient is formulated and used correctly.

  • Skin dryness very oil absorbing formulas may strip too much moisture
  • Mild stinging or redness especially on freshly exfoliated or compromised skin
  • Allergic contact dermatitis rare but possible for those sensitive to plant compounds
  • Interaction with strong actives combining with high level acids or retinoids could raise irritation risk

If you notice any persistent discomfort stop using the product and seek advice from a healthcare professional.

Comedogenic Rating

Rating: 1/5

Alternanthera Sessilis Extract is primarily composed of lightweight water-soluble flavonoids and phenolic acids rather than heavy oils or waxes, so it has little tendency to block pores. The mild astringent nature of the extract can even help keep follicles clearer by reducing excess surface sebum. For these reasons it earns a low score of 1.

Suitable for acne-prone or breakout-prone skin.

The final rating can shift slightly depending on how the extract is delivered. If it is combined with richer emollients or butters in a formula, the overall product could feel heavier than the raw extract would suggest.

Summary

Alternanthera Sessilis Extract lends two key benefits to cosmetics: it curbs excess oil and it keeps unwanted surface bacteria in check. Its flavonoids and phenolic acids gently tighten pores, balance shine and discourage microbial growth, which can help maintain a clearer complexion or fresher scalp.

The ingredient is still something of an under-the-radar botanical. You will see it pop up in targeted oily skin gels, toners and hair tonics but it has not reached the household name status of tea tree or witch hazel.

Overall safety is solid with only occasional reports of minor dryness or irritation. Always check the full ingredient list and do a brief patch test when trying any new product that contains Alternanthera Sessilis Extract, especially if your skin is sensitive.

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