Cosmetics Formulation Development

I want to know that AA-2G used to make serum must use Active Protec UV with Active Protec Ox what percentage and can use Sodium Metabisulfite to สารกันเสีย 0.2%, can it be added?

Hello Active Protec UV with Active Protec Ox 1% each is enough. It is important to have a proper pH adjustment too. You can check the proper pH from the website.