Alternanthera Sessilis 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 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 Oil?

Alternanthera Sessilis Oil is a fragrant volatile oil extracted from the entire Alternanthera sessilis plant, a member of the amaranth family. The plant grows in warm, humid regions and has long been valued in folk beauty rituals for its soothing feel on skin and hair. Chemically the oil is a blend of lightweight aromatic compounds such as terpenes and phenolics that give it a mild herbaceous scent and an affinity for bonding to hair strands.

To obtain the oil, freshly harvested plants are cleaned, lightly dried then placed in a steam distillation still. Steam lifts the volatile molecules from the plant tissue, they condense with water vapor, and the oil layer is separated, filtered and bottled. This gentle method keeps most of the delicate compounds intact.

Its smooth slip and subtle fragrance have led formulators to include Alternanthera Sessilis Oil in rinse-off and leave-on hair conditioners, nourishing masks, shine serums, scalp tonics and one-step styling creams aimed at taming frizz or reviving dull lengths.

Alternanthera Sessilis Oil’s Cosmetic Benefits/Uses

In modern hair care Alternanthera Sessilis Oil is prized for one key function.

As a hair conditioning agent it coats the cuticle with a thin, breathable film that helps detangle strands, reduce static, seal in moisture and boost natural shine. Regular use can make hair feel softer, look smoother and become easier to style while adding a light botanical scent.

Who Can Use Alternanthera Sessilis Oil

This lightweight botanical oil suits most hair and scalp types, including dry, normal and slightly oily. Its non greasy film helps lock in moisture without weighing strands down, making it friendly for fine hair as well. People with very oily scalps may prefer to use it only on mid lengths and ends to avoid extra buildup.

The oil is plant derived with no animal inputs so it is appropriate for vegans and vegetarians.

No data suggest that topical use poses specific risks during pregnancy or while breastfeeding. Even so, this is not medical advice and anyone who is pregnant or nursing should show the full ingredient list of any product to a qualified doctor before use just to be safe.

Alternanthera Sessilis Oil is not known to cause photosensitivity, meaning it should not make skin or scalp more sensitive to sunlight.

Potential Side Effects/Adverse Reactions

Responses to any natural oil can differ from one person to another. The issues listed below are only potential effects and are uncommon when the ingredient is properly formulated and used as directed.

  • Allergic contact dermatitis resulting in redness flaking or small bumps
  • Itching or a burning feel on the scalp especially on broken skin
  • Eye stinging if the product accidentally drips into the eyes
  • Worsening of existing scalp conditions if sensitivity to fragrant oils is present

If any of these reactions appear stop using the product and seek advice from a healthcare professional.

Comedogenic Rating

Rating: 1 / 5

Alternanthera Sessilis Oil is composed mainly of lightweight aromatic molecules that evaporate or sit on the surface without clogging pores. Unlike richer fixed oils packed with long-chain fatty acids, this plant’s volatile oil does not readily mix with sebum or harden inside follicles. For that reason it receives a low score of 1.

Most people prone to acne or breakouts can use products containing this oil without extra concern, provided the overall formula is not heavy or greasy.

Because the oil is fragrant it could still trigger irritation in very sensitive or compromised skin, which might indirectly lead to blemishes. Always consider the full ingredient deck of a product, not just one component, when judging pore-clogging potential.

Summary

Alternanthera Sessilis Oil serves mainly as a hair conditioning agent that smooths the cuticle, reduces frizz, helps detangle and adds a natural sheen. It does this by forming a thin breathable layer over each strand while its aromatic compounds leave a light herbal scent.

The ingredient is still a niche addition in the beauty world, most often found in boutique or regionally inspired formulas rather than in mass-market lines. As awareness of plant-based actives grows it may gain wider attention.

Current safety data and user reports show it to be well tolerated with only rare adverse reactions. When trying any new product that includes Alternanthera Sessilis Oil it is wise to perform a quick patch test first to make sure your skin or scalp agrees with it.

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