Formula Review and Compatibility Check

Hello! The team has reviewed all three formulas you submitted. Here is the information:

Formula 1: Light Serum for Acne-Prone Skin

• Compatibility: Most ingredients are generally compatible. However, this formula uses Azelaic Acid and Salix Alba Bark Extract (containing Natural Salicylic Acid), which are acidic ingredients, together with Niacinamide (Safe-B3™). Niacinamide is most stable in the pH range of 5-6, while Azelaic Acid and Salicylic Acid work well in an acidic environment (pH below 5). This combination might result in a relatively low pH for the formula, which could affect the long-term stability of Niacinamide. It is recommended to check the pH of the final formula.
• Gel Texture: Using 0.6% Acacia Senegal Gum and 0.5% Xanthan Gum, totaling 1.1%, is sufficient to increase the viscosity of the water-based formula, resulting in a light liquid gel or light serum texture as desired.
• Approximate pH: Due to the presence of Azelaic Acid and Salicylic Acid, the pH of this formula will be quite acidic. It is expected to be in the range of approximately 4-5, which is suitable for the function of Azelaic Acid and Salicylic Acid. However, as mentioned, this might be lower than the optimal stability range for Niacinamide. It is recommended to measure the actual pH of the resulting formula.

Formula 2: Soothing Essence

• Compatibility: Most ingredients in this formula are highly water-soluble and generally compatible. There are no prominent compatibility restrictions among the ingredients in this formula.
• Texture: This formula does not use significant amounts of gelling agents or thickeners. The texture will be watery or similar to a toner. For some types of Essence, a light liquid texture is common. If you prefer a slightly more viscous texture to feel more like an Essence, you might consider adding a small amount of a gelling agent, such as Xanthan Gum or other suitable water-phase thickeners, at a concentration of 0.1-0.3%.

Formula 3: Peptide Anti Aging

• Compatibility: Most ingredients are generally compatible. However, this formula contains Copper Peptide (GHK-Cu) along with 0.2% Disodium EDTA. EDTA is a chelating agent that can bind to metal ions, including copper in Copper Peptide. Using EDTA with Copper Peptide might affect the efficacy or stability of the Copper Peptide, depending on the concentration and specific types of ingredients used. It is highly recommended to check the compatibility information from the supplier of the Copper Peptide you are using to see if it can be used with Disodium EDTA at this concentration.
• Should any ingredients be added?: This formula already contains a variety of key anti-aging peptides, as well as moisturizing and soothing ingredients, making it a good and comprehensive formula on its own. Adding other ingredients depends on specific additional goals. For example, if you want to enhance antioxidant benefits, you might consider other antioxidants compatible with Copper Peptide (e.g., Vitamin E Tocopheryl Acetate, Ferulic Acid - but compatibility and pH must be checked again). Or if you want to strengthen the skin barrier, you might consider Ceramides or Cholesterol. However, overall, the current formula is already good. The most important thing is to check the compatibility between Copper Peptide and Disodium EDTA.

Hope this information is helpful. If you have any further questions or wish to adjust the formulas, feel free to ask!