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Optimizing shampoo formula for preservative efficacy
SCI 5%
coco betaine 4.5%cationic guar gum .35%guar gum .2%
xanthan gum .5%
sodium phytate
benzyl alcohol + DHA 0.8%Is there anything else I can do to this formula to help preservative efficacy/reduce bug food?
should i eliminate the cationic guar gum ? as well as regular guar gum?
ive already reduced my surfactant percentage. it affects foam a lot but i dont mind, and it works for my fussy skin type.
thanks!
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