Warming Sensation from High Concentration Humectants
Question
I'm concerned about the warming sensation on the skin when using high concentrations of humectants. I've heard this happens with ingredients like Glycerin, Propylene Glycol, and Butylene Glycol. If my formula contains Butylene Glycol at 20%, will it cause this warming sensation? Does combining multiple humectants at high concentrations increase this effect?
Answer
Based on the staff's explanation, increasing Butylene Glycol to 20% in your formula is unlikely to cause a significant warming sensation on the skin. This warming effect typically occurs when multiple humectants (like Glycerin, Propylene Glycol, and Butylene Glycol) are present together at high concentrations. If your formula primarily uses Butylene Glycol at 20% without other high-level humectants, it should be fine.
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