The most important difference between keratin and protein therapy is that in the hair keratinization method, synthetic keratin must be used, but in protein therapy, a mixture of several proteins will be used to strengthen and soften the hair, and the operator mainly looks for vegetable and animal proteins. It goes so that it can meet the nutritional needs of the hair. In fact, as you noticed, protein therapy also has a strengthening role.
Of course, in choosing hair keratin and protein therapy method, the shelf life should also be considered. Protein therapy lasts between 4 and 6 weeks, while the effect of hair keratin lasts between 4 and 6 months. It is straightening the hair in such a way that the roughness of the hair is completely removed and your hair is out of the frizzy and fragile state. However, the purpose of protein therapy is to strengthen the hair structure, help to regenerate hair strands and roots, and thus increase hair strength. Therefore, protein therapy has a root effect and will strengthen the hair root and also the structure of the hair shaft.
The question that most people ask when performing creatine and protein therapy is whether these two methods carry risks or not. The most important difference between keratin and protein hair therapy is the amount of formaldehyde used. In creatine, a lot of formalin must be consumed, but in protein therapy, the consumption of formalin is much less. Therefore, keratin is more dangerous. The use of each of these two methods is different based on the condition of people's hair. If a person has very curly and wavy hair, protein therapy will be more effective.

The main differences between these two methods
Materials used for creatine and protein therapy
The materials used for protein therapy and creatine are different, which in the creatine method Beta protein is used, while in protein therapy, products containing protein are used.
Permanence and durability
Keratin hair in general has a durability of about 6 months and is considered a semi-permanent method, but the durability of protein therapy in comparison With creatine, it is less and its durability is about 4 months. If you take care of your hair well after protein therapy and hair keratin, you can increase their durability.

The degree of hair restoration
The degree of hair restoration is another difference between keratin and protein therapy. The reason is that people who have many problems in their hair should use protein therapy. Cost of Keratin and Protein Therapy
Hair keratin is more expensive compared to protein therapy and that is why it can be said that protein therapy is more cost-effective compared to keratin and provides more regeneration for hair.
The level of hair smoothness and hair beautification
hair smoothness and hair shine in hair keratin method is more than protein therapy and for this reason hair keratin is more suitable for people who want to have straight hair, but people who want to revive their hair more, it is better to use protein therapy.