Lactose

What Lactose is & what it does

Lactose is a naturally occurring sugar most commonly associated with milk, and in cosmetics it is used in purified form. In skincare and sunscreen formulas it typically serves as a humectant and skin-conditioning agent that can help attract and hold moisture. A notable point is that, like other sugars, it is water-soluble and contributes to a hydrated skin feel.

What does Lactose do in skincare?

In skincare and sunscreen formulas, lactose typically acts as a humectant and skin-conditioning agent. As a sugar, it can help attract and hold moisture, contributing to a hydrated skin feel. It is usually a supporting ingredient rather than a primary active.

Is Lactose vegan?

Lactose is a sugar most commonly associated with milk, so traditionally sourced lactose is of animal origin and would not be considered vegan. Because sourcing can vary, vegan status depends on the specific supplier and product. If vegan formulation matters to you, check the product's labeling.

Is Lactose comedogenic?

Lactose is a water-soluble sugar and is not generally flagged as a pore-clogging ingredient. It is used mainly for its moisture-related properties. If your skin is reactive, patch testing the finished product is a reasonable step.

Sunscreens with Lactose

We rate 12 sunscreens that contain it, showing the top 10 by overall score:

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