Review of Whitening and Repairing Formulations

Thank you for sharing your formulations and questions. I understand you are a beginner and have combination, acne-prone skin with slight redness.

Regarding your question about calculating with a pre-made base: When using a pre-made base like the Aloe Gel base, you treat the base itself as a single ingredient in your formula. The percentage you use for the base (e.g., 64% for the Aloe repair gel) is the percentage of the total weight of your final product that is made up of that base. You don't need to calculate the individual ingredients within the base unless you are trying to understand the base's composition or modify it significantly. Your method of listing the base with its percentage, just like other ingredients, is the correct way to calculate your formula proportions.

Here is a review of your formulations based on the feedback provided:

1. Acne Whitening Gel

Based on the staff's feedback, here are the points to consider and adjustments recommended for this formula:

• Pro Polymer: The staff recommends increasing Pro Polymer from 0.5% to 1.5-2.0%. This is because Azelaic Acid can weaken the gel structure, and increasing the gelling agent (Pro Polymer) will help maintain the desired consistency.
• Allantoin: The staff noted that Allantoin's solubility in water is limited to 0.5% of the water content. With 75.3% water, the maximum Allantoin is about 0.3765%. Your proposed 0.5% is slightly over this. The staff recommends using only 0.2% to avoid undissolved powder, especially considering potential measurement inaccuracies with small amounts.
• Activated Resorcinol: It was noted that Activated Resorcinol might not dissolve completely at 1.0% with the original solvent system. The staff recommends increasing Butylene Glycol from 1.0% to 3-4% to improve the solubility of Activated Resorcinol.

You will need to adjust the percentage of water (or another ingredient) to accommodate these changes, ensuring the total formula adds up to 100%.

2. Aloe repair gel

Based on the staff's feedback, this formula is generally correct as written.

• DMAE Liquid: The staff mentioned that DMAE Liquid has a risk of weakening the gel consistency. They suggest that after you have mixed the formula, you might need to add an additional amount of Pro Polymer (e.g., around 0.5%) to thicken the gel back up if it becomes too thin. This is a potential adjustment to make after the initial mixing.

In summary, for the Acne Whitening Gel, you should revise the percentages of Pro Polymer, Allantoin, and Butylene Glycol and adjust the water accordingly. For the Aloe repair gel, the formula is correct, but be prepared to potentially add a small amount of Pro Polymer after mixing if the texture is too thin due to the DMAE.