North Dakota Cosmetology Practice Exam

Question: 1 / 410

What is the ideal pH of hair for optimal health?

5.5

The ideal pH of hair for optimal health is 5.5. This slightly acidic pH level is important for maintaining the integrity and overall health of the hair. Hair itself is made up of keratin, and at a pH of 5.5, the cuticle layers of the hair are closed and smooth, which helps to protect the inner structure of the hair strand. This level of acidity also helps to retain moisture, prevent frizz, and reduce the likelihood of damage.

When hair is maintained at this optimal pH level, it can better withstand environmental factors and styling processes, leading to healthier-looking hair. A pH higher than 5.5 can cause the cuticle to lift, which may result in dryness and increased susceptibility to damage. On the other hand, a pH that is too low can lead to brittleness. Therefore, striving for a pH level around 5.5 is critical for maintaining the hair’s strength, shine, and overall appearance.

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7.0

4.5

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