1. Which Paraben in combination with phenoxyethanol has best preservative effect specially for Shampoo?
2. At what percentage can methylparaben and ethylparaben be solubilized in phenoxyethanol?
3. Is there any incompatibility between parabens and SLES or APG?
4. What percentage of phenoxyethanol/Paraben blend is enough to protect this Shampoo formula?
Water, SLES, CAPB, APG, Glycol distearate, guar gum, polyquaternium 10, EDTA, lavender essential oil.