Hello
Allantoin is soluble in not more than 0.5% of water, in this formula it will be approximately 90% water, so it can contain
Allantoin not more than 0.45% approximately. This formula can be mixed. But be careful about the process. By mixing, the gel must be created. Complete and then add
glycolic acid into the formula
Disodium EDTA 0.1%
Allantoin Pro Polymer 1%
Glycerin 5%
Phenoxyethanol SA 1% when match well Then you will get a gel. and then add
AHA 5%, stir to dissolve. The gel may be some liquid, can add
Pro Polymer added at the back to adjust the thickness. You can give as you want.