Formula Review for Hydrating and Brightening Water-Based Lotion

Regarding your proposed formula for a water-based lotion aimed at providing hydration and brightening for normal to dry skin, and achieving a non-sticky feel:

The ingredients you've selected are suitable for these goals. Natto Gum, Double Hyaluron Liquid, Natural Moisturizing Amino Acids, Sodium Lactate Plus, and Sodium PCA are excellent humectants that draw moisture into the skin, providing hydration. Soy Extract offers both moisturizing and brightening benefits.

As noted by the staff, this formula is expected to result in a liquid texture, which aligns with your desire for a water-based lotion.

Addressing Potential Stickiness

The staff's suggestion to reduce the percentages of Soy Extract and Sodium PCA is key to achieving a less sticky feel. Based on the recommended usage rates for these ingredients:

• Soy Extract (Isoflavones / Genistein): The recommended usage rate is typically 1-5%, with 2-3% being a common recommendation. Your proposed 5% is at the high end. Reducing this to 2-3% as suggested by the staff can help reduce potential tackiness while still providing benefits.
• Sodium PCA 50%: The recommended usage rate for Sodium PCA 50% is 0.5-2%. Your proposed 10% is significantly higher than the maximum recommended level. This high percentage is likely the primary contributor to potential stickiness. Reducing this to 2-3% as recommended by the staff is crucial for improving the skin feel.

Using Sodium PCA 50% at 2-3% is still within a range that provides effective moisturizing benefits when combined with other humectants in your formula.

Other Ingredients

• Natto Gum: Your proposed 5% is within the recommended usage rate (3-10%, recommended 5%). It's a good choice for moisture.
• Double Hyaluron Liquid: Your proposed 5% is suitable for normal/dehydrated skin and the lower end for dry skin (recommended 5-10% for dry skin). It provides multi-depth hydration.
• Natural Moisturizing Amino Acids: Your proposed 3% is within the recommended range for skin products (0.5-5%, 3-5% for skin). This blend mimics the skin's natural moisturizing factors.
• Sodium Lactate Plus: Your proposed 1% is at the lower end of the recommended range (1-5%). You could consider slightly increasing this to 2-3% for enhanced 24-hour hydration, but 1% is still effective.
• Phenoxyethanol SA (eq. Optiphen Plus): Your proposed 0.5% is within the recommended usage rate (0.5-1.25%) and provides broad-spectrum preservation.

Recommended Adjustments

To summarize, to achieve a more comfortable, non-sticky feel while maintaining hydration and brightening benefits, it is recommended to adjust the percentages as follows:

• Soy Extract (Isoflavones / Genistein): Reduce from 5% to 2-3%.
• Sodium PCA 50%: Reduce from 10% to 2-3%.
• Consider slightly increasing Sodium Lactate Plus from 1% to 2-3% for potentially enhanced hydration, though 1% is acceptable.
• Adjust Distilled Water accordingly to reach 100%.

By making these adjustments, your formula should provide excellent hydration and brightening effects with a much lighter, non-sticky feel suitable for normal to dry skin.