Indiana State Beauty Practice Exam

What is the typical safe pH range for skin care products?

1. 3.0 to 4.0

2. 4.5 to 5.5

3. 5.5 to 6.5

4. 6.0 to 7.0

The correct answer is: 4.5 to 5.5

The typical safe pH range for skin care products is 4.5 to 5.5. This range is considered optimal for maintaining the skin's natural acidity, which is crucial for various skin functions, including microbiome balance and barrier protection. The skin's surface, known as the acid mantle, typically has a pH around 4.7, slightly acidic. Using skin care products within this range ensures that they are gentle and less likely to disrupt the skin's natural barrier. Products with pH values outside of this range, particularly those that are too alkaline (like the range 6.0 to 7.0), can strip the skin of its natural oils, leading to irritation, dryness, or other adverse reactions. Similarly, products that are too acidic (like those at 3.0 to 4.0) can also cause irritation and may not be suitable for everyday use. Therefore, formulations with a pH of 4.5 to 5.5 are best suited for maintaining skin health and comfort while providing effective results in skin care.