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The easiest way is to recommend shea butter . You can add it to the recipe at 1-2%.
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Every ingredient in the cosmetics category that the company sells can be registered with the FDA as cosmetics as usual.
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If the ingredients are also on the FDA - Cosmetics list, you can use them without a problem.
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Can you do it? It is recommended to choose a powder that has already been coated so that Caprylyl Methicone sticks to the skin more easily.
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BTMS must be dissolved in Part B using heat.
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Niacinamide has a very high usage rate. Would you recommend reducing it?
Protec SQ 1% and packed in packaging that protects from light. If you use a lot, the formula will turn yellow.
Other ingredients are not a problem.
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No, the ingredients don't mix together. You must choose to use one or the other.