Formula Review and Usage on Face/Body

Regarding your formula for cracked heels and elbows and whether it can be used as an essence, the staff's response indicates that while an essence texture is possible, a cream might be more effective for severely dry and cracked skin due to the emollient properties of oils in a cream base.

Your proposed formula, containing Sodium Lactate, Urea, Gluconolactone, and Sodium PCA, is suitable for treating cracked heels and elbows. It provides good moisturizing benefits and moderate exfoliation, which is effective for these areas.

For using this formula on the face, the staff recommends reducing the concentration of Urea and Sodium Lactate by approximately 50%. This is because at the original concentrations (10% Urea and 5% Sodium Lactate), their exfoliating effect might be too strong for the more delicate skin on the face.

The use of Gluconolactone in the formula is important regardless of the texture (essence or cream). It helps to stabilize Urea and maintain the formula's pH within the optimal range of 4.5-5.5, which is crucial for Urea's effectiveness over time.

In summary:

• The original formula is suitable for body areas like cracked heels and elbows.
• For facial use, reduce the concentration of Urea and Sodium Lactate by about 50%.
• Gluconolactone is necessary to stabilize Urea and control pH in both body and facial versions of the formula.