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Thank you very much, but Allantoin can be mixed into Base Propylene Glycol right?

Thank you very much for answering all questions. The next question to ask is: 1. We will use Ultrafine Ascorbic Acid instead of the normal one. 2. We will cut the natural extracts from the formula. But is there anything that can be used instead to reduce irritation from acidity? Not expecting result...

I would like to try mixing Vitamin C without water. Based on the formula of Kiehl's : Dermatologist Solution Powerful Strength Line Reducing Concentrate 1. Propylene Glycol 2. Cyclopentasiloxane 3. Ascorbic Acid 10.5% 4. Glycerin 5. Cetyl PEG/PPG-10/1 Dimethicone 6. Dimethicone Crosspolymer 7. Lauro...

There are already different types of action on the website (Whitening, Anti-Aging), try it out.

We wanted a watery lotion that hydrates + reduces irritation. After washing your face

Let's say we mix วิตามินบี 3 , Green Tea Extract , Beta Glucan into Hada Labo, is there any steps required?

Thank you very much for answering my grievances.

The two ingredients here.. can be put together without any problem, right? Because Salicylic Acid has to use the proper acidic Ph in order to work fully. I'm afraid that Niacinamide will deteriorate its effectiveness.