What Is Biosaccharide Gum-4?
Biosaccharide Gum-4 is a plant-derived polymer that starts its life as sorbitol, a sugar alcohol usually sourced from corn. Through controlled fermentation, friendly microorganisms turn this sorbitol into a long chain of natural sugars made up of L-fucose, D-glucose and glucuronic acid. After fermentation, chemists gently remove acetyl groups in a step called deacetylation then filter and dry the material into a smooth white powder ready for cosmetic labs.
The ingredient first caught the beauty industry’s attention in the late 1990s when brands were searching for gentler alternatives to synthetic film formers. Its sugar-based backbone offered a natural route to create light, flexible layers on the skin, making it popular in European spa skincare before spreading worldwide.
Today you will spot Biosaccharide Gum-4 in hydrating serums, sheet masks, leave-on moisturizers, soothing after-sun gels, anti-aging creams and even some mineral makeup primers. Formulators like it because it blends easily in water-based systems and leaves a soft, non-sticky finish.
Biosaccharide Gum-4’s Cosmetic Benefits/Uses
The main job of Biosaccharide Gum-4 in a formula is skin conditioning, meaning it helps the skin feel softer, smoother and better hydrated after application. The sugar polymers form an invisible mesh that locks in moisture while giving the surface a silky touch. As a bonus, this light film can shield the skin from everyday pollutants and help other active ingredients stay in place longer, improving overall product performance.
Who Can Use Biosaccharide Gum-4
Biosaccharide Gum-4 is considered gentle enough for all skin types, including sensitive, dry, oily, combination and mature skin. Its lightweight film does not trap excess oil or clog pores, making it a comfortable choice for acne-prone complexions as well. People with a known allergy to polysaccharides or corn-derived ingredients should exercise caution, but this is uncommon.
The gum is produced through the fermentation of plant-derived sorbitol and contains no animal by-products, so it is suitable for both vegans and vegetarians.
Current data shows no evidence that Biosaccharide Gum-4 poses a risk to women who are pregnant or breastfeeding. Because every pregnancy is unique, this information is not medical advice and anyone who is expecting or nursing should run any skincare product past a qualified healthcare professional before use.
The ingredient does not increase photosensitivity, so it will not make skin more prone to sunburn. It is also compatible with other common skincare actives and is not known to inactivate them.
Potential Side Effects/Adverse Reactions
Responses to topical Biosaccharide Gum-4 can vary from person to person. The following list covers potential side effects; most users will not experience these issues when the ingredient is formulated correctly.
- Mild redness or irritation in very sensitive skin
- Transient itching or stinging immediately after application
- Allergic contact dermatitis in individuals allergic to corn or polysaccharides
- Watery eyes or nasal irritation if inhaled as loose powder during manufacturing or decanting
If you notice any of these reactions while using Biosaccharide Gum-4 or a product containing it, stop application and consult a healthcare professional if symptoms persist.
Comedogenic Rating
Rating: 1 / 5
Biosaccharide Gum-4 is a large water-soluble sugar polymer that sits lightly on the skin and is easily rinsed away. It does not form a heavy, greasy film that can block pores, which keeps its pore-clogging potential low. The slight chance of buildup in very rich formulas is why it is not rated a perfect 0.
Suitable for acne-prone or breakout-prone skin in most cases.
The rating can shift if the ingredient is paired with highly occlusive oils or waxes, so the overall comedogenicity of a finished product depends on the full formula.
Summary
Biosaccharide Gum-4 conditions skin by forming a breathable sugar-based mesh that locks in water, smooths texture and helps shield the surface from pollution. Its light film also holds other actives in place so they can work longer.
While not a headline superstar like hyaluronic acid or niacinamide, it has a steady following among formulators who want a natural touch and a silky feel. You will mostly find it in hydrating serums, sheet masks and gentle moisturizers.
Current research shows Biosaccharide Gum-4 is low risk for irritation and non-sensitizing, making it safe for daily use across skin types. As with any new skincare ingredient, do a small patch test when trying a product that contains it just to be cautious.