Replicating SK-II Essence Formulation (Galactomyces & Preservatives)

Replicating a commercial product like SK-II essence is quite complex, as the original formula contains many ingredients in precise proportions.

Based on the ingredients you listed (Galactomyces Ferment Filtrate, Butylene Glycol, Pentylene Glycol, Water, Sodium Benzoate, Methylparaben, Sorbic Acid), you have identified key components.

• Galactomyces Ferment Filtrate is the main active ingredient (Pitera).
• Butylene Glycol and Pentylene Glycol are typically used as solvents, humectants, and texture enhancers.
• Water is the base.
• Sodium Benzoate, Methylparaben, and Sorbic Acid are preservatives, essential for preventing microbial growth, especially in water-based formulas.

The previous suggestion of 95% Galactomyces and 5% Butylene Glycol is a very simple mixture focusing on the main active and a solvent. While Galactomyces is the primary component of SK-II, the original product contains other ingredients, including preservatives.

It's important to note that while some suppliers might add preservatives to their Galactomyces ingredient, adding water or other components in a DIY mixture necessitates proper preservation to ensure safety and stability.

Providing exact percentages for a full replication of SK-II's complex formula is not feasible without the specific, proprietary formula. Cosmetic formulation requires careful balancing of ingredients for efficacy, stability, and safety.

If you are creating a DIY mixture, focusing on a high percentage of Galactomyces Ferment Filtrate is key, but ensure proper preservation if your formula includes water or other ingredients susceptible to microbial contamination.