Rhizobian Gum

What is Rhizobian Gum?

Rhizobian Gum is a high-molecular-weight polysaccharide obtained through the aerobic fermentation of specific Rhizobium bacterial strains. This natural-origin biopolymer features a complex structure of glucose, galactose, and other sugars, making it an effective rheology modifier in cosmetics. Commonly found in skincare creams, lotions, serums, hair styling aids, and makeup formulations, it functions by creating viscous networks that enhance product texture and spreadability. In applications, it forms sheer, flexible films on skin or hair to lock in moisture, improve product adherence, and suspend particles like pigments or exfoliants. Its shear-thinning properties allow easy application while providing long-lasting hold without stickiness, contributing to stable emulsions and uniform distribution in diverse personal care items.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.
Hair fixative
Provides style hold by forming a film on hair, helping maintain shape, reduce frizz, and improve durability in sprays, gels, and mousses.
Plasticizer
Improves flexibility and reduces brittleness of films (e.g., nail coatings, hair sprays), helping prevent cracking and enhancing smooth application.
Suspending agent
Keeps insoluble particles (pigments, beads, actives) evenly dispersed by increasing viscosity or forming a network, preventing settling and separation.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Hair fixing
Improves style retention by depositing film-forming polymers that hold hair in place while balancing stiffness, flexibility, and humidity resistance.

Benefits

Enhances product texture for smooth, even application in creams and lotions.

Provides flexible film formation to boost wear time in makeup and sunscreens.

Supports hair styling by offering humidity-resistant hold in gels and sprays.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals preferring natural thickeners in daily moisturizers and serums.
Those with rare sensitivities to fermented polysaccharides.
People using hair products needing frizz control and style retention.
Individuals preferring silicone-free or gum-free formulations.
Users of makeup seeking improved longevity and water resistance.
People with known allergies to bacterial-derived ingredients.

Safety Notes

  • Rated low hazard by independent safety assessments.
  • Minimal reports of skin reactions in cosmetic use.

Frequently Asked Questions about Rhizobian Gum

What is Rhizobian Gum made from?

A polysaccharide from fermenting Rhizobium bacteria, used as a natural thickener.

Is it safe for sensitive skin?

Generally low irritation risk based on safety evaluations.

What products commonly contain it?

Skincare creams, hair stylers, and makeup for texture and hold.