Compatibility issues can be entered because
Ume Extract is soluble in water. which in the formula contains water as an ingredient But in terms of efficiency, it may be necessary to check the pH of the formula again that it is in the range because
Ume Extract should be in the formula at a pH in the range of 4.0-6.5, but generally We think that various skin care products must be designed to be in the same pH range. So from my personal opinion, I think you can add it to it.