Cosmetics Formulation Development

Can these two be put in the same formula? That I think I will put in the formula is just this. 10% 3% 1% rest is water

Hello, you can use it in the same formula. But it can be quite harsh on the skin. If used continuously every day, it may be suitable for temporary use. Or don't use it every day, you have to adjust the usage rate. according to the user's skin condition Each user has different skin, resistant to skin peeling. / /PHA can be different?