The role of preservatives is to extend shelf life and prevent contamination from mold, bacteria, fungus, and yeast. While some skincare products require preservatives, others do not. Water-based formulations, for example, are more susceptible to microbial growth and need protection if stored outside the fridge for extended periods.

At LINNÉ, we use radish root ferment as our primary preservative in water-based products. Unlike conventional preservatives that act like antibiotics—wiping out all bacteria, good and bad—this probiotic-derived ferment colonizes the formula with beneficial bacteria, preventing the growth of harmful microbes while supporting the skin’s microbiome.

A Biocompatible, Skin-Enhancing Preservative

Our radish root ferment is created using Leuconostoc, a lactic acid bacteria also found in kimchi fermentation. This process naturally produces mild salicylic acid, which enhances preservative action while also gently exfoliating and clearing pores. Unlike synthetic preservatives like phenoxyethanol or parabens, radish root ferment is:

• Microbiome-friendly – It preserves without disrupting the skin’s delicate ecosystem.

• Worker-safe – Many conventional preservatives pose health risks during production; ours does not.

• Planet-friendly – While more costly, it carries no hidden costs to human health or the environment.

Preservation in Oil-Based Formulas

Oil-based products are naturally more stable, but we go further by selecting carrier oils with long shelf lives and high antioxidant profiles, steering clear of oils prone to rapid rancidity. Additionally, we infuse our formulations with botanical extracts, powders, and essential oils known for their antimicrobial, antibacterial, and antifungal properties—creating an added layer of protection.

While we provide expiration dates to encourage use at peak freshness, our rigorous formulation approach has resulted in exceptional stability, with no recorded cases of mold, yeast, or microbial contamination. At LINNÉ, we prioritize purity, safety, and bioactivity, ensuring every product remains fresh, potent, and skin-compatible—without compromise.