Hello, the problem is not at
สารกันเสีย but on the raw material. due to fresh ingredients have not undergone the sterilization process. causing a lot of infection into the formula
สารกันเสีย is not a disinfectant. that can be disinfected in large quantities, but
สารกันเสีย do The only function is to control the growth of the germ. which in such an environment where there is a lot of infection out of control (or may need
สารกันเสีย in very high quantity if control is required. which exceeds the FDA's permission to use due to security risks)