PEG-7

PEG-7 is a polyethylene glycol, a synthetically derived polymer that functions as both a humectant and a solvent in skincare formulations. It works by attracting water molecules and helping to dissolve other ingredients, making it a practical choice for formulators seeking to improve product texture and hydration delivery.This ingredient is used across a range of skincare products to enhance moisture retention and improve the sensory feel of formulations. Its small molecular weight allows it to work efficiently without leaving a heavy residue on the skin.

PEG-7 functions as a humectant by forming hydrogen bonds with water molecules in both the air and deeper skin layers, drawing them towards the stratum corneum (the skin's outermost layer). This helps to maintain hydration in the epidermis and can improve skin plumpness and elasticity over time.As a solvent, PEG-7 also helps dissolve water-insoluble ingredients, allowing formulations to incorporate a wider range of actives and making them easier to apply evenly across the skin.

PEG-7 is typically used as part of a complete formulation rather than as a standalone treatment. For best results, apply products containing this ingredient to damp skin to maximise the humectant effect. Layer it beneath heavier occlusives like oils or creams if you have very dry skin, as this helps lock in the moisture it draws to the surface.

PEG-7 is generally well-tolerated across skin types and is considered safe for regular use. Those with sensitivity to polyethylene glycols should patch test first, though allergic reactions are uncommon.