South Dakota Cosmetology Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

What is the ideal pH range for hair products to maintain healthy hair?

3.0 to 4.0

4.5 to 5.5

The ideal pH range for hair products to maintain healthy hair is between 4.5 and 5.5. This slightly acidic range is important because hair itself has a natural pH that falls within this level. By using products within this pH range, you help to maintain the hair’s natural state, promoting cuticle integrity and minimizing damage.

Products that are too alkaline, such as those with a pH above 7, can cause the hair cuticles to lift, leading to frizz, breakage, and overall loss of manageability. Conversely, products with a pH that is too low may not effectively cleanse or condition hair, which can interfere with the overall health of hair strands.

The 4.5 to 5.5 pH range supports the hair's natural balance and enhances its shine, strength, and smoothness, making this choice the most suitable for promoting healthy hair.

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6.0 to 8.0

8.0 to 9.5

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