Creating HA face serum need help!
Hello! I was looking to create a 1% solution of hyaluronic acid including low and high molecular weights. I was wondering if adding vegetable glycerin to the recipe would be a good idea, also I would like to add sodium anisate as a preservative yet I am unsure at what percentage I should use it at and whether I should add it at the same time the HA is hydrating in the distilled water or after it has been mixed.
. Also a side note for a different formula but I was wondering what would be the best time to add arrowroot powder to make the cream less greasy, should it be in the liquid phase or after it is solidified again?
thank so much!!
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