Trends come and go, but myths can stick around. When it comes to choosing the right hair care routine, many believe that neutral pH automatically means gentleness and respect for the scalp. But this belief needs a closer look: a neutral pH shampoo or detangling spray isn’t always the best match for your hair.
What is pH, exactly?
pH - short for potential hydrogen - measures how acidic or alkaline a substance is. The scale ranges from 0 to 14, with 7 being neutral. Below 7 is acidic, above 7 is alkaline.
Naturally, both your hair and scalp have a slightly acidic pH, typically between 4.5 and 5.5. This natural acidity plays a crucial role in maintaining the health and balance of the hair fiber.
Why an acidic hair care product is actually good for your hair
Contrary to popular belief, it’s not neutral pH that’s most respectful of your hair: it’s an acidic one. Here’s why:
- It protects the hair fiber: An acidic pH helps keep the cuticles - the outermost layer of the hair - sealed tight. This means smoother, shinier hair that’s less prone to dehydration or environmental stress.
- It maintains scalp balance: A slightly acidic environment helps prevent the growth of microorganisms that can cause dandruff or irritation.
The myth of neutral pH shampoos
Neutral pH is often marketed as "gentle on skin." While that may be true for some parts of the body, it doesn’t always apply to your hair. A hair care product with a pH of 7 can actually disrupt the scalp’s balance, lift the cuticles, and leave your hair looking dull or feeling rough.
Cair products are designed to respect the naturally acidic nature of both your hair and scalp.
- Our rice water shampoo has a pH of 4.5: it is ideal for enhancing shine, smoothing cuticles, and leaving your hair soft and supple.
- Our pre-shampoo repair mask, with a slightly alkaline pH of 6.5, gently opens the cuticles to allow active ingredients to penetrate deep into the hair fiber. A delicate balance that maximizes performance.
Key takeaways
Here’s what you should remember about pH and your hair care routine:
- Healthy hair has a natural pH of 4.5 to 5.5
- An acidic pH seals the cuticles, boosts shine, and protects the scalp
- Neutral pH isn’t always the best fit for hair
- Our rice water shampoo (pH 4.5) helps maintain your hair’s natural balance
- Our pre-shampoo mask (pH 6.5) enhances ingredient absorption
Often overlooked, pH is a key factor in choosing the right hair care products. By selecting formulas that respect your hair’s natural environment - like those from Cair - you’re giving your hair exactly what it needs to thrive.