Feedback on Your Silicone-Free Hair Serum Formula

Regarding your proposed silicone-free serum formula for scalp and hair nourishment, hair loss reduction, and new hair growth, here is some feedback based on the ingredients and their typical usage:

Your formula includes several beneficial active ingredients for hair and scalp health, such as Biotin Express™, Melatonin Forte™, Coffee Extract, Creatine 100, and Panthenol (Vitamin B5) ExtraLite™. It also incorporates silicone-free conditioning agents like Poly-Conditioner Pro, Poly-Conditioner Eco, and Guar Cationic (GuarCat™), along with a preservative (Phenonip® P4).

While these ingredients are generally compatible in formulations, there are a few points to consider for a leave-on serum applied via dropper:

• Conditioning Polymer Concentrations: You are using Poly-Conditioner Pro at 1%, Poly-Conditioner Eco at 1%, and Guar Cationic (GuarCat™) at 0.1%. For leave-on products, it is generally recommended to use conditioning polymers at lower concentrations compared to rinse-off products to avoid stickiness or residue. The proposed 1% for Poly-Conditioner Pro is higher than its recommended usage rate (0.2-0.5%). The combination of these conditioning agents, especially Poly-Conditioner Pro at 1%, might result in a serum texture that is too thick or sticky for a dropper application and leave-on use. You might consider reducing the concentration of Poly-Conditioner Pro and potentially Poly-Conditioner Eco to achieve a lighter, non-greasy feel suitable for a serum.
• Coffee Extract Concentration: Your proposed 5% Coffee Extract is higher than the recommended 3% for hair loss formulas. While this might be intended for increased efficacy, it could potentially affect the formula's stability or texture as Coffee Extract is an electrolyte.
• Melatonin Forte™ Stability: Melatonin Forte™ is sensitive to air and light. For optimal stability and efficacy over time, products containing Melatonin Forte™ should ideally be packaged in air-protected containers, such as vacuum tubes. A standard dropper bottle exposes the product to air each time it is opened, which could lead to the degradation of the Melatonin Forte™.
• Biotin Express™ Stability: Biotin Express™ is sensitive to UV light. Your formula should include a UV filter to protect the Biotin from degradation if the product will be exposed to light.
• Biotin Delivery: The description for Biotin Express™ suggests that adding Urea (3-7%) and Triacetin (10% of Urea) can help improve Biotin's transport into the skin. Your current formula does not include these ingredients, which might impact the delivery efficiency of Biotin.
• pH Adjustment: Guar Cationic (GuarCat™) requires a pH below 7.0 for proper dissolution and function. Ensure the final pH of your serum is within the recommended range for all ingredients (generally pH 4-7 for most ingredients in your list, though Melatonin Forte™ and Phenonip® P4 tolerate a wider range) and specifically below 7.0 for GuarCat™.

In summary, while the ingredients are compatible, the concentrations of the conditioning polymers and Coffee Extract may need adjustment for optimal texture in a leave-on serum. Additionally, consider the stability requirements for Melatonin Forte™ and Biotin Express™ regarding packaging and UV protection.