What Is Aureobasidium Pullulans Ferment Extract?
Aureobasidium Pullulans Ferment Extract comes from the fermentation broth of Aureobasidium pullulans, a naturally occurring black yeast. During fermentation the microorganism produces pullulan, a lightweight polysaccharide, along with small amounts of proteins, amino acids and other fermentation metabolites. Pullulan first gained attention in the food industry for its ability to create clear edible films, and formulators soon noticed that the same property could help skin care products feel smoother and look more polished. To make the cosmetic grade extract, manufacturers grow the yeast in a controlled nutrient medium, allow it to ferment, then filter out the cells. The liquid is purified, concentrated and spray-dried or preserved as a solution, giving a stable ingredient ready to blend into formulations. You will most often see Aureobasidium Pullulans Ferment Extract in sheet masks, lifting and firming serums, primers, lightweight moisturizers, setting sprays and even some hair styling products where a flexible film is desirable.
Aureobasidium Pullulans Ferment Extract’s Cosmetic Benefits/Uses
This ingredient is prized for one main function: film forming. When applied to skin or hair it creates an invisible breathable layer that lightly tightens as it dries, giving an instant smoothing effect while helping to lock in moisture and improve the staying power of other actives or pigments in the formula.
Who Can Use Aureobasidium Pullulans Ferment Extract
Aureobasidium Pullulans Ferment Extract is generally suitable for all skin types. Its lightweight film forming action benefits oily and combination skin by adding minimal extra weight while helping to control surface shine. Dry or mature skin can enjoy the soft tightening finish without the heavy feel of thicker occlusives. Sensitive skin usually tolerates the ingredient well because the main polymer, pullulan, is considered mild, though anyone with a known yeast or fermentation sensitivity should proceed cautiously.
The extract is produced from a microorganism and does not rely on animal inputs, so it is considered vegan and vegetarian friendly. That said it is always smart to confirm that the full product formula does not include animal derived stabilizers or secondary ingredients if strict adherence is important.
No data point to risks for pregnant or breastfeeding individuals when Aureobasidium Pullulans Ferment Extract is used topically in cosmetic concentrations. It is not known to penetrate deeply or affect hormones. This is not medical advice and anyone who is pregnant or nursing should run any new skincare product past a qualified healthcare provider to be safe.
The ingredient does not make skin more sensitive to sunlight so it is not regarded as photosensitising. It also plays well with common actives like retinoids or vitamin C because it forms a compatible surface film rather than reacting chemically.
Potential Side Effects/Adverse Reactions
Side effects and reactions to the topical application of Aureobasidium Pullulans Ferment Extract can vary from person to person. The points below list potential issues yet they are unlikely to represent the typical user experience when the ingredient is formulated and used correctly.
- Mild redness or stinging in very sensitive skin
- Allergic contact dermatitis in individuals sensitive to yeast derived ingredients
- Temporary tight feeling that some users may interpret as dryness
- Rare clogging or breakouts if layered heavily with rich occlusives on acne-prone skin
- Eye irritation if product migrates into the eye area before fully setting
If any of these effects occur stop using the product and seek advice from a healthcare professional or dermatologist.
Comedogenic Rating
Rating: 1/5 – Aureobasidium Pullulans Ferment Extract is water soluble and forms a very thin breathable film that rinses away easily, so it is unlikely to block pores on its own. Its pullulan polymer sits on the surface rather than sinking into follicles, which keeps the risk of congestion low. People prone to acne or breakouts can usually use products containing this ingredient without problems, especially in lightweight formulas. The rating is not zero because any film former has a small theoretical chance of trapping sebum if layered with heavy oils or waxes. If you already know you react to yeast derived ingredients you may want to approach with extra caution.
Summary
Aureobasidium Pullulans Ferment Extract mainly acts as a film former, laying down an invisible flexible layer that smooths skin texture, locks in moisture and helps makeup or actives stay put. The pullulan it contains is responsible for this quick setting tight yet comfortable finish. While not as famous as hyaluronic acid or niacinamide, the extract is gaining quiet popularity in sheet masks, primers and lifting serums where a fast surface polish is desirable without adding weight.
Current data show the ingredient is low risk, non sensitising for most users and compatible with a wide range of actives. As with any new cosmetic, it is wise to perform a quick patch test before full use just to be safe.