Michigan Esthetician State Board Practice Exam

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Study for the Michigan Esthetician State Board Test. Utilize flashcards and multiple choice questions, each featuring hints and explanations. Prepare for success!

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What is a product added to a formulation to enhance the effectiveness of a preservative?

Surfactant
Chelating agent
Humectant
Emollient

The correct answer is: Chelating agent

The correct choice is a chelating agent. In cosmetic formulations, chelating agents are substances that can bind to metal ions, which may otherwise destabilize the formulation or compromise its preservative system. By sequestering these metals, a chelating agent helps to enhance the effectiveness and stability of preservatives, ensuring that they can perform their role in preventing microbial growth more effectively. Surfactants, while they do play a vital role in reducing surface tension and helping to mix oil and water, do not specifically target metal ions or enhance preservative action. Humectants are designed to retain moisture in the skin and provide hydration, while emollients primarily serve to soften and smooth the skin. Although these ingredients may contribute to the overall formulation, they do not specifically enhance preservative effectiveness in the same way a chelating agent does.