Preservatives for Placenta Serum

Yes, Phenoxyethanol can be used as a preservative in a serum containing placenta extract. However, placenta extract is a protein-rich ingredient, which can be more susceptible to microbial growth. Therefore, it is highly recommended to use a broad-spectrum preservative system to ensure adequate protection.

While standard Phenoxyethanol (Extra Pure) is effective against bacteria, it is less effective against fungi. For a formulation containing placenta extract, consider using a broad-spectrum preservative blend that includes Phenoxyethanol along with other agents that are effective against fungi and yeast.

Recommended Preservative Options:

• Phenoxyethanol SA (eq. Optiphen Plus): This blend contains Phenoxyethanol, Caprylyl Glycol, and Sorbic Acid, providing broad-spectrum protection against bacteria, fungi, and yeast. It is suitable for water-based formulations like serums.
• Chlorphenesin / Phenoxyethanol (Microcare PHC eq.): This combination also offers broad-spectrum preservation.

Important Considerations:

• Usage Rate: You might need to use the preservative at the higher end of the recommended usage rate range, especially with protein-rich ingredients like placenta.
• Challenge Test: It is crucial to perform a challenge test on your final serum formulation to confirm that the chosen preservative system is effective in preventing microbial growth throughout the product's shelf life. This is a critical step for any cosmetic product, particularly those containing ingredients prone to contamination.

Using a broad-spectrum preservative like Phenoxyethanol SA or Chlorphenesin / Phenoxyethanol will provide better assurance of the stability and safety of your placenta serum compared to using standard Phenoxyethanol alone.