PEG-5 Glyceryl Triisostearate

PEG-5 Glyceryl Triisostearate is a synthetic compound created by combining polyethylene glycol (PEG) with glyceryl triisostearate, a fatty acid derivative. It functions as both an emollient—softening and lubricating the skin surface—and an emulsifier, which allows oil and water-based ingredients to blend smoothly in a formula.This ingredient is commonly used in skincare products to improve texture, spreadability and formula stability. It belongs to a class of ingredients known as pegylated esters, which are widely used in cosmetics to enhance product performance.

As an emollient, PEG-5 Glyceryl Triisostearate sits on the skin surface and acts as a lubricant, helping to smooth rough texture and reduce water loss from the outer layer of skin. Its hydrophobic (oil-attracting) and hydrophilic (water-attracting) properties allow it to work between oil and water molecules.As an emulsifier, it stabilises oil-in-water or water-in-oil formulations by reducing interfacial tension, meaning oil droplets remain evenly dispersed throughout a cream or lotion rather than separating over time. This ensures consistent product performance and a uniform texture when ap…

PEG-5 Glyceryl Triisostearate is a formulation ingredient rather than an active treatment, so its benefit depends on the overall product formula. Use it as directed on the product label—typically as part of your daily moisturiser, serum or treatment product. There is no need to adjust frequency based on this ingredient alone.

PEG-5 Glyceryl Triisostearate is generally well-tolerated and approved for use in cosmetics across major regulatory bodies. It is non-toxic and non-irritating for most skin types, though individuals with severe sensitivity or fungal acne concerns may wish to avoid it or test on a small area first.