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Lactobacillus

What Lactobacillus is & what it does

Lactobacillus is a genus of lactic-acid-producing bacteria used in cosmetics, often as an inactivated culture or ferment. In skincare and sunscreen formulas it is associated with conditioning and soothing roles and is frequently described as supporting the skin's surface balance. Because it derives from microbial fermentation, it appears in products positioned around skin-friendly or probiotic-inspired care.

What does Lactobacillus do in skincare?

In skincare, Lactobacillus is used as a skin-conditioning ingredient, usually as an inactivated culture or as part of a ferment. It is associated with soothing the skin and supporting its natural surface balance, which is why it features in probiotic-inspired products. The exact role depends on the specific form and the rest of the formula.

Is Lactobacillus safe?

Lactobacillus used in cosmetics is typically present as an inactivated or fermented form rather than live bacteria, and it is widely used as a conditioning ingredient. It is generally considered well tolerated on skin. As with any ingredient, people with very sensitive skin may want to patch test first.

Is Lactobacillus vegan?

Lactobacillus is a bacterium, not an animal-derived ingredient, so the organism itself is not animal in origin. However, the growth medium used to culture it can sometimes include animal-derived nutrients such as milk. If vegan status is important, look for a brand statement confirming the sourcing.

Sunscreens with Lactobacillus

We rate 25 sunscreens that contain it, showing the top 10 by overall score:

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