Levan
What is Levan?
Levan is a high-molecular-weight fructan polysaccharide produced via microbial fermentation of sugars by bacteria such as Bacillus subtilis, consisting of fructose units connected by β-(2→6) glycosidic bonds. This gives it excellent solubility and film-forming capabilities. In cosmetics, it appears in moisturizers, serums, creams, and sunscreens. Functionally, levan spreads evenly on the skin to create a thin, flexible barrier that reduces water evaporation and blocks minor environmental irritants like pollutants. Its humectant qualities draw ambient moisture to the skin surface, supporting hydration without greasiness. The breathable nature of this film ensures skin comfort, making levan ideal for daily protective routines in various formulations.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Forms a continuous film to lock in moisture and enhance product longevity on skin.
Provides a protective barrier against external irritants.
Contributes to a smooth, hydrated skin feel without pore clogging.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| People with dry or dehydrated skin needing extra hydration support. | Those with rare allergies to microbial polysaccharides. |
| Individuals exposed to environmental stressors seeking gentle protection. | People preferring strictly plant-derived ingredients only. |
| Users of makeup or sunscreens wanting improved wear and hold. | Individuals sensitive to film-forming agents, despite low risk. |
Safety Notes
- Considered low hazard with no known comedogenic effects.
- Typically non-irritating for most skin types based on cosmetic safety reviews.
Frequently Asked Questions about Levan
What is levan in skincare?
Levan is a microbial-derived fructan polysaccharide used as a film former and skin protectant in cosmetics.
Is levan safe for daily use?
Yes, it rates low on safety scales and shows no irritation or comedogenicity in reviews.
How does levan benefit skin?
It creates a moisture-locking barrier while protecting against irritants, aiding hydration.