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I have several questions regarding cosmetic formulation: 1. **Eye Area Reaction:** I made a trial formula containing Water, Shea Butter, Centella Asiatica Extract, Coenzyme...
Does Salicylic Acid (BHA), including encapsulated forms like `Encapsulated Salicylic Acid`, still require an acidic pH to exfoliate skin effectively? Are there alternative...
I noticed that the Ready-to-Use products contain Niacinamide at 5%. Could you please explain: * Why is 5% chosen for Niacinamide in Ready-to-Use products? * How does Urea...
I have two formulations and need advice on preservation and stability: 1. A water-based formula containing Water, Alpha Arbutin, Glucosamine, Niacin, and Hyaluronic Acid, which...
Based on the provided financial figures for L'Oreal (sales €11,213M, cost of goods €3,247M, advertising €3,403M, R&D €386M), which show advertising costs significantly...
My chemical mixture has separated and is not clear (turbid). How can I make it homogeneous and clear again? What might be the cause, and what ingredients or methods can help fix this?
Following up on the previous discussion about ingredients for hair growth, I'd like to know about cosmetic ingredients that can help eyebrows become thicker and darker, similar...
I have very dry skin and am looking for a formulation or ingredient recommendations. Could you suggest key ingredients, including Natural Moisturizing Factors (NMFs) and...
I have a Retin A 0.10% cream and want to mix in additional ingredients to reduce irritation and improve skin health and anti-aging benefits. I am considering adding Vitamin E,...
What are the stability conditions and shelf life for Alpha Arbutin, both as a raw material powder and when incorporated into a product formulation? Is it possible to visually...
Could you provide information on the properties, usage, and potential combination of the ingredients `PEG-240/HDI Copolymer Bis-Decyltetradeceth-20 Ether` and `Trehalose` for...
When using new cosmetic containers purchased from a store, such as from Daiso, is it necessary to clean them before filling? Specifically for **squeeze tubes** with small...
I have several questions about cosmetic formulations based on previous topics: 1. Regarding the **Anhydrous Vit C** formula mentioned previously, how does its efficacy compare...
I am allergic to Vitamin E (it causes breakouts). I am interested in Vitamin C L-ascorbic 15%. If I exclude Vitamin E, will the effectiveness be significantly reduced? I have...
My mother used a serum containing brightening and anti-aging actives like Alpha-Arbutin, Niacinamide, Argireline, Leuphasyl, Pepha®-Tight, and Glucosamine for about 10 days....
When modifying a formulation by removing a portion of a pre-made Gel Base and replacing it with an active ingredient (e.g., Vitamin C), how do the percentages of the original...
Regarding Xanthan Gum: 1. Does Xanthan Gum `ละลายในน้ำมันได้เลย` (dissolve directly in oil)? 2. Is there a specific `วิธีกวนในน้ำมันเหมือนละลายในน้ำ` (mixing method in oil like...
How can I make a DIY makeup remover for oily skin?
I have questions regarding several ingredients: 1. What are the differences between Licorice root extract, Licorice leaf extract, and Licorice PT40? 2. Why does a cream...
I am interested in creating an anhydrous (water-free) Vitamin C serum similar to products like Kiehl's. I have a question about the formulation and the warming sensation that...
