Leucidal Liquid

Natural Preservatives
Written By Tori Thomas

Leucidal Liquid – (Lactobacillus Ferment)

Why we love it at The Mindful Gem

Leucidal Liquid is a natural, probiotic-based preservative created through the fermentation of Lactobacillus, the same beneficial bacteria used in food fermentation. It provides broad-spectrum antimicrobial protection while maintaining the integrity of natural, botanical-rich formulas. Research shows that Lactobacillus ferments effectively inhibit the growth of yeast, mold, and harmful bacteria, making it one of the cleanest alternatives to conventional synthetic preservatives (International Journal of Cosmetic Science, 2015, DOI: 10.1111/ics.12230). At The Mindful Gem, we use Leucidal Liquid in water-based products such as gels, creams, and botanical extracts to ensure they remain fresh, safe, and stable—all while honoring our commitment to naturally preserved skincare.

Ingredient Overview:

Leucidal Liquid is created by fermenting Lactobacillus bacteria, which naturally produce antimicrobial peptides. These peptides disrupt microbial growth without the harshness of parabens or traditional preservatives.

Parts Used & Traditional Uses:

Though not a botanical, Leucidal Liquid draws on ancient fermentation principles, transforming probiotics into protective skincare allies. Used in modern clean beauty as a gentle, effective preservation system compatible with sensitive skin.

Skin Benefits & Mechanism:

  • Antimicrobial peptides help prevent microbial contamination in water-rich formulas.

  • Supports microbiome-friendly skincare, unlike harsher preservatives.

  • Gentle, non-irritating, and compatible with botanical ingredients.

  • Helps extend shelf life while preserving natural product integrity.

Key Benefits:

  • Natural, probiotic-derived preservation

  • Microbiome-friendly

  • Gentle + non-irritating

  • Broad-spectrum antimicrobial protection

Sources:

  • Jeong, S.H. et al. (2015). “Antimicrobial activity of Lactobacillus ferment filtrates as cosmetic preservatives.” International Journal of Cosmetic Science. DOI: 10.1111/ics.12230

  • US Patent: Active Micro Technologies — Lactobacillus ferment filtrate

  • Lin, T.K. et al. (2018). “Microbiome-supportive skincare.” International Journal of Molecular Sciences.

© The Mindful Gem. All product formulations, recipes, and proprietary blends are the intellectual property of The Mindful Gem and Cosmictoria Natural Wellness. Reproduction, duplication, or use of these formulas for commercial purposes is strictly prohibited and may result in legal action.
Tori Thomas
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