Connecticut Hairdresser Licensure Practice Exam

Question: 1 / 400

Which ingredient in hair products functions as a preservative?

Silicones

Parabens

Parabens are widely recognized for their role as preservatives in cosmetic and hair products. They help inhibit the growth of bacteria, mold, and yeast, which can spoil products and compromise their safety and efficacy over time. By extending the shelf life of hair care items, parabens allow manufacturers to ensure freshness and maintain the quality of the product for consumers.

Silicones, on the other hand, primarily function as conditioning agents that provide smoothness and shine to the hair but do not have preservative properties. Alcohols can serve various purposes, such as acting as solvents or astringents, but they don't function effectively as preservatives. Glycerin is mainly used as a humectant, attracting moisture to the hair, rather than preserving the product itself. Understanding the distinct roles of these ingredients helps clarify why parabens are the correct choice for a preservative in hair products.

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Alcohol

Glycerin

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