Understanding Phenoxyethanol Concentration in Your Formula

Based on the formula you provided for a total of 200g:

• Silky serum base: 50g
• Regu-age: 5g
• Pep-coll: 5g
• Argireline: 10g
• Repair activator: 10g
• Alpha arbutin: 2g
• Phenoxyethanol: 2g
• Water: 116g
• Total: 200g

The concentration of Phenoxyethanol in your 200g product is calculated as (2g / 200g) * 100% = 1%.

Phenoxyethanol is a widely used preservative in cosmetic products, and the standard recommended usage rate is typically between 0.5% and 1.0%. Therefore, the 1% concentration you have in your formula is within the generally accepted safe limit for cosmetic use.

Regarding your concerns:

• Skin Cancer: There is no scientific evidence to suggest that Phenoxyethanol at cosmetic concentrations (like 1%) causes skin cancer.
• Danger or Irritation: While individual sensitivity varies, 1% Phenoxyethanol is a common and generally well-tolerated concentration. It is considered safe for use in leave-on products, including those applied to the face and around the eyes.
• How to Fix It: Since the concentration of Phenoxyethanol in your 200g product is 1%, which is within the standard safe range, you do not need to dilute the product further because of the preservative amount. The product is likely safe to use as is in terms of the preservative concentration.

The formula you have created, particularly with ingredients like Regu-age, Pep-coll, Argireline, Repair activator, and Alpha arbutin, is suitable for use on the face and around the eye area.

In conclusion, the amount of Phenoxyethanol you added results in a 1% concentration in your 200g product, which is a standard and safe level for cosmetic formulations. You do not need to worry about having added too much preservative or needing to fix it through dilution.