Feedback on your Face Cream Formula for Brightening

Based on the conversation provided, here is a summary of the feedback regarding your face cream formula for natural brightening, suitable for normal skin:

• Formula Review: The staff mentioned that your current formula might be slightly heavy for normal skin, especially due to the relatively high amount of oil. This could make the skin feel oily or shiny, particularly if used as a day cream.
• Adding SPF 25: To add SPF 25, you would need to incorporate sunscreen ingredients into the formula. The staff suggested looking into various sunscreen ingredients available. As an example, they mentioned a product called "SPF Protect" and advised that using approximately 14-15% of this product would achieve SPF 25 (based on their calculation that 1% SPF Protect provides about SPF 1.75).
• Oil/Moisturizer Percentage: There is no strict rule or fixed percentage for the amount of oil or moisturizing ingredients relative to water. The ideal percentage depends heavily on individual skin type and the desired feel of the cream. For normal skin, the staff suggested that the amount in your initial formula might be on the higher side. They recommend starting with lower percentages of oils/moisturizers and gradually increasing them while testing the feel on your skin until you find a consistency and level of hydration that you are comfortable with and that doesn't feel too heavy.

The ingredients you listed for brightening (like ascobyl palmitate, activated resorcinol, camellia sinensis extract) are commonly used for this purpose, but the main feedback focused on the overall feel and oil content for normal skin and how to incorporate SPF.