After a recommendation from my hairdresser, I bought the shampoo and mask from the extreme line, as well as the black heat protection spray. My hair was damaged from coloring and heat. Dry and lifeless.
I followed the instructions, carefully massaging the scalp for 3 minutes. You can already feel the difference from the moment the product touches your hair. I applied the mask and walked around the house for 5 minutes. Rinse thoroughly. I lightly dried my hair and applied the heat protection before using the blow dryer.

The quantity of shampoo and mask is small compared to the price, I accept that. However! You get what you pay for. We are talking about hair-friendly products, without silicones and parabens, which are cheap ingredients used by companies that sell in supermarkets. Hence the low price. The fact that these specific products worked for my hair doesn't make them perfect for everyone's hair. Depending on each person's needs, that's what you buy. If you have healthy hair, it might not affect you and you might criticize it. If you have oily hair, same! If it's damaged, give it a chance!

After washing and drying my hair, it became softer, smells nice, and I hope it won't get greasy quickly.

A tip to use your products sparingly without wasting them. First, wet your hair very well and then apply a small amount to your scalp. Rubbing will determine if you need to add more shampoo.
Never use shampoo on dry or slightly damp hair, it will definitely be wasted. When I have applied a hair treatment oil before washing, I rinse it initially with a regular shampoo and then use my expensive shampoo. I have also ordered a special roller (€1.50) with thick silicone bristles that massages the scalp to improve blood circulation during shampooing without hurting my fingers.

Finally, a tip from my hairdresser. Just like the human body needs a variety of foods to be healthy, our hair needs a variety of ingredients to be balanced. If you eat quality beef every day, you will strengthen your hemoglobin, but neglecting fruits and vegetables will weaken your immune system.
Therefore, do not feed your hair only with protein or any specific ingredient, but alternate your shampoos with another quality shampoo every time you wash. Otherwise, your hair will be overloaded with one ingredient (e.g. protein) and end up breaking, and you will blame the product.

Moderation is key!