Pro tips


We recommend using a good straightening iron (nano-titanium plates are ideal), which is equipped with a temperature regulator. It should be used between 150 and 190 degrees, if it is fine or delicate hair; between 180 and 210 if it is normal, and between 200 and 230 if it is very thick.

Each type of hair has its ideal temperature, so it is important to have equipment that guarantees a constant and uniform temperature of the plates. (not too hot not to damage the hair, not too cold to be effective). The Yero Professional team uses a Titanium straightener for optimal results.

For very curly hair at the root, the heated comb is strongly recommended, in order to smooth the roots as well as possible.

 Steam straighteners and self-thermoregulators are strongly discouraged but can be used for maintenance.


Clarifying shampoos, containing sulfate, salt, sodium, and in particular Sodium Lauryl Sulfate (SLS), should be avoided as much as possible after having done a tannin or botox smoothing.

Sulfate-free shampoos such as Chebe Collection moisturising shampoos are much softer and retain the smoothing benefits over time, while sulfate-free shampoos can damage keratin.

A sulfate-free shampoo is specifically recommended in the following three cases: After Brazilian straightening to protect its effect. For people with a sensitive scalp. For people who want to limit the weakening and loss of their hair and resume healthy sebum production, perfect for obtaining beautiful healthy hair

It foams much less than a classic shampoo, which can be quite surprising when first used. The right gesture: distribute the product evenly over the entire scalp then massage for 2 minutes with the fingertips.


These 2 techniques have in common to be keratin-based hair care products designed to nourish, repair and soften the hair fiber.

 You would like to discipline your hair and have smooth, frizz-free hair.

  However, tannin smoothing will relax the hair between 80 and 100% and botox will repair and relax the hair up to 70%.

A b-tox treatment or b-tox smoothing?

What makes a hair b-tox effective is the fact that it is rich in keratin, amino acids and hyaluronic acid. It strengthens the hair and its fortifying action contributes to its good hydration.

The difference will be the modification of the curl by the use of heat (hair dryer and straightener) during the application. It will act as a thermo-active smoothing treatment.

It will act as a non-smoothing repair treatment without the use of heat.

Does b-tox remove curls?

In addition to taking care of your fiber, the latter aims here to relax curls, remove frizz and the foamy appearance of the hair thanks to a smoothing power of around 50%.


Smoothing with tannin (taninoplastia)

The fiber is relaxed to around 80% and the hair smoothed for around 3 to 4 months

Smoothing with b-tox (botulinum)

The fiber is relaxed to around 70% and the hair smoothed for around 2 to 3 months.

This will also depend on the frequency of washing and also on the hair products (shampoo/care) used.

The use of sulfate-free and keratin products is highly recommended.

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