Washington Master Esthetics Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

Which AHA is known for having a small molecular size and weight?

Glycolic acid

Glycolic acid is known for its small molecular size and weight, which is significant in the context of skin care and esthetics. This small size allows glycolic acid to penetrate the skin more deeply and effectively than other alpha hydroxy acids (AHAs). Its ability to penetrate the epidermis makes it particularly useful for exfoliation and promoting cell turnover, which can help to improve skin texture, reduce fine lines, and treat conditions like acne and hyperpigmentation.

In contrast, the other AHAs listed, such as citric, lactic, and malic acids, have larger molecular structures, which limits their depth of penetration. While they are still beneficial for skin exfoliation and hydration, their effects are generally more superficial compared to glycolic acid. This is why glycolic acid is often preferred in aesthetic treatments when deeper exfoliation is desired.

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Citric acid

Lactic acid

Malic acid

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