Coprinus Comatus 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 Coprinus Comatus Extract?

Coprinus Comatus Extract comes from the shaggy mane mushroom, a white elongated fungus that often pops up in grassy areas after rain. Rich in natural compounds like polysaccharides, amino acids and phenolic antioxidants, it has long been eaten in many cultures for its nutritive value. Interest in its topical benefits grew in the early 2000s when researchers began looking at edible mushrooms as gentle plant based antioxidants for skin care. To make the extract, the harvested mushrooms are cleaned, dried and ground before being steeped in a water or water-glycol solution. The liquid is then filtered and concentrated, giving a stable fluid or powder that blends easily into creams and serums. Today you can spot Coprinus Comatus Extract in face masks, hydrating moisturizers, soothing after-sun gels and anti-aging treatments where a boost of antioxidant support is desired.

Coprinus Comatus Extract’s Cosmetic Benefits/Uses

This extract serves mainly as an antioxidant in cosmetic formulas. By neutralizing free radicals created by UV light and pollution it helps slow the look of premature aging, supports the stability of other delicate ingredients and keeps overall product performance consistent throughout its shelf life.

Who Can Use Coprinus Comatus Extract

Because it is a mild water based antioxidant, Coprinus Comatus Extract tends to agree with most skin types including dry, oily, combination and sensitive. It is lightweight, non greasy and has no known pore clogging traits so acne-prone users usually tolerate it well. The ingredient comes from a plant source rather than an animal so it is suitable for vegans and vegetarians as long as the final formula is free of animal derived solvents or additives.

No specific warnings exist for pregnant or breastfeeding women, yet formal safety data are limited. This information is not medical advice so anyone who is pregnant or nursing should check with a healthcare professional before adding new skincare products.

The extract is not known to cause photosensitivity and can be worn in both day and night routines. Standard daytime sun protection is still recommended to keep the skin shielded from UV damage.

Potential Side Effects/Adverse Reactions

Side effects from topical Coprinus Comatus Extract differ from person to person. The points below list potential reactions, though most consumers will not experience them when using a well formulated product.

  • Mild redness or stinging on extremely sensitive skin
  • Itching or small bumps in individuals allergic to mushrooms
  • Contact dermatitis if used in a formula with other irritating ingredients
  • Rare discoloration of very light fabrics if the product is not fully absorbed before dressing

If any discomfort, rash or persistent reaction occurs stop use immediately and consult a healthcare provider.

Comedogenic Rating

Rating: 0–1. Coprinus Comatus Extract is water based and contains virtually no fatty acids or waxy residues that could linger inside pores. Its molecules remain largely on the surface delivering antioxidant support without forming an occlusive film, so the likelihood of clogging is extremely low.

Because of that light non greasy profile it is generally suitable for acne-prone or breakout-prone skin.

No industry reports link this mushroom extract to increased sebum production or comedone formation. Of course a finished product’s overall comedogenicity will also depend on the other ingredients in the formula.

Summary

Coprinus Comatus Extract’s main role in cosmetics is antioxidant defense. By donating electrons to unstable free radicals it helps slow the visible signs of environmental aging, supports color and scent stability in a formula and helps keep other actives from degrading too quickly. It can do all of this without adding weight or oil, making it friendly for nearly every skin type.

While not as famous as reishi or tremella extracts, shaggy mane is quietly showing up in more moisturizers, after-sun gels and sheet masks as brands look for gentle plant based antioxidants that are safe for sensitive skin.

Topically the ingredient is considered very safe with low sensitization potential and no known systemic risks. Still, skin can react unpredictably so it is wise to patch test any new product that contains Coprinus Comatus Extract before applying it to the entire face or body.

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