Compatibility and Stability of Liquid AA2G when mixed with Physiogel AI Cream
Question
I have two questions:
Can I mix
Liquid AA2GwithPhysiogel ai creamwhich has the following ingredients:
Aqua, Olea, Europaea, Glycerin, Pentylene, Glycol, Palm Glycerides, Olus, Hydrogenated Lecithin, Squalane, Betaine, Palmitamide MEA, Acetamide MEA, Sarcosine, Hydroxyethyl-cellulose, Sodium Carbomer, Carbomer, Xanthan GumGenerally, how can we know which ingredients cannot be mixed together? (apart from losing properties due to inappropriate pH, what other issues can occur if ingredients are incompatible?)
Answer
Regarding mixing Liquid AA2G with Physiogel AI cream:
Based on the information provided, the main concern is the pH compatibility. AA2G is most stable and effective in a neutral pH range, ideally around 6.5-7. Physiogel AI cream is often formulated at a slightly acidic pH, possibly around 5.5. Mixing AA2G into a product with a pH outside its optimal range (like 5.5) can cause it to degrade faster. However, if you plan to use the mixture relatively quickly (e.g., within 3 months) and store it in a cool place, the degradation might not be significant enough to cause a major issue.
Regarding general ingredient compatibility:
Generally, most cosmetic ingredients can be mixed together without major issues. Incompatibility that renders the mixture unusable (apart from pH effects) is relatively rare. When incompatibility does occur, it is often visually apparent, such as through precipitation, separation, or changes in texture. As mentioned, pH is typically the most critical factor to consider for maintaining the stability and efficacy of many active ingredients.