A keratin treatment can turn frizzy, hard-to-style hair into smooth, shiny hair that dries in half the time. Once you’ve tried it, the next question is usually: how often should you get a keratin treatment?
The short answer: most clients book every 3 to 5 months. Here’s what changes that timing, and how to stretch your results.

How Long Does a Keratin Treatment Last?
Keratin coats the outside of your hair to smooth it. It doesn’t change your hair’s structure, so it slowly washes out over time. Most results last around 3 to 5 months. As it fades, frizz comes back gradually. There’s no harsh regrowth line, just your natural texture returning.
What Affects How Often You Need One
- How often you wash: Every wash removes a little keratin. Fewer washes means longer results.
- Your shampoo: Sulfate-free shampoo is gentler and helps the treatment last.
- Your hair type: Very curly or coarse hair may notice frizz returning sooner.
- Swimming and sun: Chlorine, salt water and strong sun all speed up fading.
- Humidity: Muggy Texas summers test any smoothing treatment. Our guide to Dallas humidity and your hair has more tips.
Signs It’s Time for Your Next Treatment
- Your blow-dry takes noticeably longer again
- Frizz is back, especially on humid days
- Your hair feels less soft and shiny
- Your natural wave is showing through again

Can You Get Keratin Too Often?
Yes. Each treatment uses heat to seal the formula in, and too much heat too often can leave hair dry or brittle. That’s why we don’t recommend booking more often than your hair needs. Waiting until the previous treatment has mostly faded is the healthiest approach.
It’s also smart to know what’s in any smoothing product. The FDA suggests asking your salon about the ingredients. We’re always happy to tell you.
How to Make Your Keratin Last Longer
- Follow your stylist’s advice on when to first wash and tie up your hair.
- Use a sulfate-free shampoo and conditioner.
- Wash two or three times a week, not every day.
- Rinse after swimming, and protect your hair from strong sun.
- Use heat protectant when you style.
- Sleep on a silk or satin pillowcase.
Frequently Asked Questions
Can I color my hair and get keratin?
Yes, but timing matters. Many clients color first, then get keratin. Ask your stylist to plan both together.
Will keratin make my hair completely straight?
Keratin smooths frizz and softens waves, but it usually doesn’t make hair pin-straight. For that, compare it with Japanese straightening in our Japanese relaxer vs keratin guide.
Is keratin good for curly hair?
It can be, if you want less frizz and easier styling. Your curls will usually soften rather than disappear.
Book Your Keratin Treatment
Ready for smoother hair? Learn about our Keratin Complex smoothing treatment and keratin treatment in Dallas, or visit us in Frisco or Austin.