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Polyglycerin-3

What Polyglycerin-3 is & what it does

Polyglycerin-3 is a humectant made by joining three glycerin units into a slightly larger molecule. Like glycerin, it draws in and holds water, so it helps keep skin hydrated and the formula comfortable, but its larger size can give a less sticky, more elegant feel. In a sunscreen it supports hydration and acts as a gentle solvent and carrier for other water-loving ingredients.

What is Polyglycerin-3 and what does it do in sunscreen?

Polyglycerin-3 is a humectant built from three linked glycerin units. In a sunscreen it works much like glycerin, attracting and holding water so skin feels hydrated and the formula stays comfortable, while its larger size tends to give a less sticky finish. It can also act as a gentle carrier that helps dissolve other water-soluble ingredients.

Is Polyglycerin-3 safe?

Yes. It is closely related to glycerin, one of the most widely used and best-tolerated moisturising ingredients, and it works on the surface of the skin. It is considered gentle and non-irritating, suitable even for sensitive skin, with no notable safety concern at cosmetic levels.

Does Polyglycerin-3 clog pores?

Generally no. It is a water-loving humectant rather than an oil or wax, so it is not considered a pore-clogging ingredient. Like glycerin, it is an unlikely cause of breakouts and is widely used in products aimed at acne-prone skin.

Is Polyglycerin-3 the same as glycerin?

Not quite, though they are close relatives. Glycerin is a single molecule, while Polyglycerin-3 is three glycerin units joined together, which makes a larger humectant. It hydrates in a similar way but the bigger molecule often feels less tacky on the skin, which is why formulators sometimes choose it alongside or instead of glycerin.

Is Polyglycerin-3 natural or synthetic?

It is derived from glycerin, which is typically plant-sourced, but it is then built up into a larger polyglycerin molecule, so the finished ingredient is processed rather than found ready-made in nature. In practice it is a plant-derived ingredient that has been gently modified for a nicer feel.

Sunscreens with Polyglycerin-3

We rate 92 sunscreens that contain it, showing the top 10 by overall score:

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