Sorbic Acid
Ingredient Info
Sorbic acid is a preservative used in skincare products to prevent the growth of bacteria, fungi, and mold, helping extend shelf life. It's a naturally-derived organic acid that's been safely used in food and cosmetics for decades.
Benefits
- Prevents microbial contamination and product spoilage
- Effective across a range of pH levels, including mildly acidic formulas
- Well-established safety history in food and cosmetic applications
Potential concerns
- Can cause transient redness, swelling, and irritation at concentrations as low as 0.1%, particularly on sensitive facial skin
- Irritation appears to be mediated by prostaglandin response rather than allergic reaction, so it may affect most people at higher doses
- May cause discomfort in individuals with sensitive or compromised skin barriers
Science: Research shows sorbic acid triggers dose-dependent erythema and edema through prostaglandin-mediated inflammation rather than immune sensitization. While physiologically inert at approved preservation levels (typically well below 0.1%), it can provoke irritation responses in human skin, suggesting careful formulation and concentration limits are important for safety.
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