Prebiotic/Probiotic/Postbiotic

Lactobacillus/Watermelon Fruit Ferment Extract

INCI: LACTOBACILLUS/WATERMELON FRUIT FERMENT EXTRACT

Reviewed by Kate · Last updated 14 Aug 2026

A fermented ingredient that conditions skin through probiotic-derived compounds

Best For Skin Types

All, Dry, Sensitive, Combination

Addresses

Dryness, Hydration, Barrier repair

Usage Frequency

Daily

What Is Lactobacillus/Watermelon Fruit Ferment Extract?

Lactobacillus/Watermelon Fruit Ferment Extract is created by fermenting watermelon fruit using Lactobacillus bacteria. During fermentation, the bacteria metabolise sugars and other compounds in the watermelon, producing bioactive molecules including amino acids, peptides, and organic acids.

In skincare formulations, this ingredient functions as a skin conditioner. The fermentation process breaks down the watermelon into smaller, more bioavailable components, which may help improve skin hydration and support the skin's natural functions.

How It Works

The Lactobacillus fermentation process breaks down watermelon's cell walls and larger molecules into smaller peptides and amino acids. These smaller molecules are easier for the skin to absorb and utilise. Fermentation also produces lactic acid and other organic acids, which can support the skin's natural moisture barrier and contribute mildly to exfoliation.

The resulting extract conditions the skin surface by improving hydration, smoothing the skin barrier, and providing antioxidant support through compounds like lycopene that persist in the fermented form.

Clinical Evidence & References

Direct clinical research on Lactobacillus/Watermelon Fruit Ferment Extract is limited. However, fermented plant extracts generally show promise in supporting skin barrier function and hydration. Watermelon itself contains lycopene, an antioxidant with established benefits for skin health.

Most evidence for this ingredient comes from cosmetic ingredient databases and in-vitro studies rather than large-scale human trials. It is generally regarded as a safe, gentle conditioning agent suitable for routine use, though individual response may vary.

How to Use

This ingredient is typically found in essences, toners, serums, and moisturisers. It works well as part of a layered routine and can be used alongside other actives. Apply to clean skin and follow with appropriate moisturisation. No special timing considerations are needed, and it may be used both morning and evening as part of regular skincare.

Safety & Precautions

Generally well-tolerated across skin types. Those with extreme sensitivity to fermented products or watermelon should patch-test first, though allergic reactions are uncommon.

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