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Shampoo Concentrate - Preservative question
I’m planning to make a shampoo concentrate where the end-user can add water. I’m hoping to have a 5:1 dilution or let the user add 20% concentrate and 80% water. So thinking I need 5 times the amount of preservative to keep this safe. BUT… government regulations don’t allow that high of a preservative concentration in a finished product. I’d appreciate some thoughts on how much preservative to concentrate! I’m currently using Geogard Ultra at 2% in the diluted product. Thank you!
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