What is the pH level of healthy hair?

Healthy hair typically has a pH level that ranges from approximately 4.5 to 5.5. This slightly acidic pH is important for maintaining the integrity of the hair cuticle, which is the outermost layer of hair. A pH within this range helps to keep the cuticles flat against the hair shaft, promoting shine, strength, and manageability. It also contributes to the overall health of the scalp, helping to prevent issues like dryness or irritation.

When hair products are formulated with a pH that aligns with this range, they can more effectively maintain the hair's natural balance and moisture levels. If the pH of hair care products is significantly outside of this range, it can lift the cuticle, leading to frizz, damage, and a lackluster appearance. Thus, understanding the pH level of healthy hair is crucial in selecting appropriate hair care products and treatments.