Free 5-question sample test with instant feedback. See how ready you are.
Question 1
What does the term 'alpha hydroxy acid' (AHA) refer to in terms of molecular structure?
Answer: AHAs are water-soluble acids derived from natural sources that have a hydroxyl group attached to the alpha (first) carbon of the acid molecule, making them effective for surface-level exfoliation.
Question 2
Which AHA is derived from sugarcane and is the most commonly used in professional esthetic treatments?
Answer: Glycolic acid, derived from sugarcane, is the most commonly used AHA because it has the smallest molecular size, allowing the deepest penetration among AHAs.
Question 3
What natural source is lactic acid derived from?
Answer: Lactic acid is derived from sour milk (lactose). It is gentler than glycolic acid due to its larger molecular size and also acts as a humectant, attracting moisture to the skin.
Question 4
What makes beta hydroxy acid (BHA) different from AHAs in terms of solubility and skin function?
Answer: BHAs are oil-soluble (lipophilic), which allows them to penetrate into the pores and dissolve sebum. This makes them especially effective for oily, acne-prone skin, unlike water-soluble AHAs.
Question 5
What is the most common BHA used in esthetic chemical exfoliation, and what natural source is it derived from?
Answer: Salicylic acid is the most common BHA, originally derived from willow bark. It is keratolytic, anti-inflammatory, and comedolytic, making it ideal for acne and oily skin types.