I have recently decided to add a thickener to my vitamin C serum. The thickener in question is Xanthan Gum Clear, from LotionCrafter.com
My question is about if I have integrated it into this formula correctly.
In my formula, you can say I have 3 phases:
- water phase (water, L-Ascorbic acid, sodium lactate)
- glycol phase (propylene glycol, ferulic acid)
- oil phase (polysorbate 80, tocopherol)
- the preservative optiphen, which I add as the very last step.
The pH is supposed to be 2.5-3
My understanding of how to use a gum
I have never used a thickener before. From research, the consensus seems to be that the most successful way to utilize a gum in a formula is to first make a slurry by combining the gum with vegetable glycerin, a solvent, or oil. After you make the slurry, add in the water phase to the slurry, mixing as you pour it in. It should gel up without clumps.
Judging by my 3 phases, is it correct for me to do it in this order:
- first add the xanthan gum to my glycol and oil phases, mixing them together with the gum to make a slurry.
- next, mix in my water phase into this slurry
- lastly, add in the optiphen.
Does that sound like the correct steps?
By the way, if you have any critiques of this formula, I am all ears for that as well.