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and would like to ask more questions in terms of usage Zinc Oxide in a lip balm formula. If the formula total100% uses Zinc Oxide how many percent in the formula?

thank you very much

Hello, I would like to inquire about lip balm making. Now the lip balm formula has been started. I want to add a sunscreen ingredient to it, and add some anti-rancid antioxidants to the formula. and preservative So I want to know that the three people asked. Which lip balm formula do you use? and as...