Is dipropylene glycol considered “bug food”?
I may be oversimplifying things, but I was under the impression that glycols generally boost preservatives. I came across this article on UL Prospector (https://www.ulprospector.com/knowledge/337/pcc-preservation-strategies-global-personal-care-formulations/) where it specified dipropylene glycol as a problematic ingredient because it’s considered a microbial nutrient. I was hoping to use a blend of propanediol and DPG to act as preservative boosters (other more effective glycols are much too expensive) in a green tea-based cleanser, but now I’m pretty concerned. Can anyone support/refute/explain this?
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