Gellan gum has a quiet second career in personal care. It is not a headline ingredient, but it solves a specific formulation problem — building a clear, structured gel in a system that is full of electrolytes — better than most of the alternatives.
What it does in a cosmetic formulation
| Function | Where it shows up |
|---|---|
| Gel former | Face gels, eye gels, after-sun gels, cooling gels |
| Thickener | Serums, essences, cleansing gels |
| Suspension aid | Exfoliating products with beads or particles, two-phase systems |
| Emulsion stabiliser | Lotions where the aqueous phase must be structured |
| Film former | Masks and peel-off products |
| Binder | Toothpaste and other paste-format products |
The INCI name is Gellan Gum. As a cosmetic ingredient it is not an "E number" — E 418 is the food additive designation and does not apply here, even though the polymer is the same.
The advantage over carbomer
Carbomer is the default gelling agent in cosmetics, and it has one well-known weakness: it is colloidal and its gels are suppressed by electrolytes. Add salts, buffers, or an active ingredient with high ionic strength and the gel collapses or thins out.
Gellan gum behaves in the opposite way. It requires cations to form its network, so an electrolyte-rich formula is not a problem — it is a help. For formulations built around:
- mineral salts and electrolyte actives,
- high levels of humectants such as glycerin and sorbitol,
- botanical extracts and salts with variable ionic content,
- acidic or alkaline actives that shift pH,
gellan gum is often the more robust structuring choice.
Other advantages
Clarity. Gellan gum forms clear gels, which matters for the market's preference for transparent formats — clear face gels, clear sheet mask essences, clear deodorants.
Low dosage. It works at around 0.1–0.5 % in most gel applications, leaving room in the formula for actives.
Non-animal origin. A fermentation-derived polymer is vegan and has no animal-derived inputs, provided the fermentation medium is suitable. For brands building a vegan or "clean" positioning, that is a marketing asset as well as a formulation one.
Salt tolerance. Relevant for salt scrubs, mineral masks, and high-electrolyte facial mists.
The limitations to know about
Being honest about these saves development time:
- It needs heat. Gellan gum must be hydrated above roughly 80–90 °C. Carbomer gels can be made cold, which is why carbomer dominates cold-process manufacture. If your production line has no heating capability, this is a real constraint.
- It needs ions. In a deionised, low-electrolyte formula there may not be enough calcium or magnesium to build the network. You may need to add a small amount of a suitable salt.
- It is not pH-independent. Gellan gum tolerates a wide pH range but performs best near neutral. Very acidic formulas, such as some exfoliating products, need testing.
- Alcohol is a complication. High ethanol content interferes with gelation; if your product is an alcohol-based gel, gellan gum is unlikely to be the right choice.
- Preservative interactions. Chelating agents such as EDTA bind the calcium the gel needs. If your preservative system includes a chelator, expect the gel to weaken — you may need to compensate with more calcium or more gum.
- Sensory. Gellan gum gels are non-tacky and clean-feeling, which suits gels and serums. It is not a heavy emollient or a film with a distinctive skin feel.
Comparison with the other natural gelling agents
| Agent | Needs heat? | Needs ions? | Clarity | Electrolyte tolerance | Skin feel |
|---|---|---|---|---|---|
| Gellan gum | Yes | Yes | Excellent | High | Clean, non-tacky |
| Agar | Yes | No | Good | Moderate | Firm, brittle |
| Carrageenan | Yes | Yes (K⁺, Ca²⁺) | Moderate | Moderate | Slightly slippery |
| Xanthan gum | No | No | Slight haze | High | Slimy at high dose |
| Sodium alginate | No | Yes (Ca²⁺) | Good | Moderate | Stringy |
| Pectin | Yes | Yes (Ca²⁺) | Moderate | Low | Soft |
Regulatory and specification notes
| Market | Framework |
|---|---|
| European Union | Cosmetics Regulation (EC) No 1223/2009; safety assessment and Product Information File required |
| United States | FDA cosmetics framework; INCI declaration |
| China | Cosmetic ingredient filing with the NMPA; ingredient must be on the approved list |
Because cosmetic products are not food, ingredient specifications differ: microbiological limits, heavy metals and residual solvents are set for cosmetic use rather than food use. Ask for the cosmetic-grade specification explicitly — a food-grade certificate does not automatically satisfy a cosmetic dossier.
What to ask a supplier
- Do you supply a cosmetic-grade specification, and what are the microbiological limits?
- What dosage and hydration conditions do you recommend for a clear gel at near-neutral pH?
- Is the material from a vegan fermentation medium, and can you document it?
- How does the gel behave in the presence of 0.05–0.1 % chelating agents?
For gellan gum (E418) with cosmetic and food-grade specifications, contact Cinogel.
Part of the E418.org gellan gum knowledge base. Cosmetic ingredients are regulated separately from food; verify requirements for each market.