How to Straighten Your Hair - Without Damaging It

If you automatically reach for the flat iron every time frizz appears, it may be time to rethink your routine.
As René Fris explains, the pursuit of sleek, glossy hair can sometimes be the very reason you’re battling dry ends and unruly strands.

We asked René how to achieve smooth hair — without the damage.

Here are his essential tips:

Hair Must Be Completely Dry

Flat irons can reach extreme temperatures — often over 400°F (200°C).
If you use them on damp hair, René warns, it’s the equivalent of boiling your hair from the inside out. Even steam straighteners require completely dry hair before use.

One Pass Is Enough

The more times you run the iron over the same section, the more stress you place on the hair.
René recommends working systematically, straightening each section only once. Use clips to divide your hair — it makes the process more controlled and effective.

Lower the Temperature

René advises never exceeding 310°F (155°C).
It’s more than enough to smooth the hair without risking deep structural damage. Choose a flat iron with precise temperature settings — avoid models labeled simply “low” or “high.”
Once you go over 350°F (175°C), real damage begins.

Choose Ceramic Plates

A quality flat iron uses ceramic plates, preferably with a tourmaline coating.
This ensures the hair glides smoothly without snagging and helps lock in moisture, leaving your hair glossy — not dry or brittle.

Don’t Straighten Every Day

No matter how careful you are, heat styling always causes some stress.
René emphasizes giving your hair time to recover. Avoid daily straightening; spacing it out by a few days will result in healthier hair and, as a bonus, shorter morning routines.

Dealing with Frizz Between Washes?

René recommends using an Anti-Frizz Shampoo and Conditioner as a simple yet effective strategy.
They help maintain shine and smoothness, even when humidity rises.
And if your hair still feels dry, a deep-conditioning treatment once a week can work wonders.