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Stronger preservation system needed!! Please advise!
Hello all! My hair gel product is currently at a lab for Stability and USP <51> testing. I just received the 1 month update and the results were not favorable and I really need advice on how to strengthen my preservation system. Currently my formula is only being preserved with Optiphen Plus (INCI:Phenoxyethanol,Caprylyl Glycol, and Sorbic Acid)
Here are my results at 1 month:
For the USP <51> study, I do have some updates at Day 28 (end of the study).All bacteria are still <1.00-log CFU/gCandida is still at inoculation level of ~5.00-log CFU/gA. niger has had a slight increase and is almost at 6.00-logCFU/gThe USP <51> acceptance criteria requires “No increase from the initial calculated count at 14 and 28 days” for yeast and mold. Based on the results of the mold your product is not considered passing.Should I just scratch the Optiphen Plus or use it in conjunction with another preservative? Any suggestions on a preservative that could help me combat this issue?Thanks in advance!
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