If you are asking these questions I am assuming you just started making thes products. My recommendation I would not sell them without challenge testing. You cannot always see dangerous ickies is such products. I had one lotion I was testing go moldy after 3 months, was really glad it had not gone to marketThanks...Is there any common preservative that I could use in shampoo, conditioner, lotions etc? Or are they different for each product?
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