Soy is the protein, according to the FAO (Food & Nutrition Organization) that is best suited to human needs. Animal proteins have a flaw, they contain too much methionine, an essential but toxic amino acid. So, if we ingest more than our needs, we will somehow poison our body. This excess methionine will be transformed into a harmful compound, and will above all acidify the body. The harmful compound is called homocysteine. Conversely, if you do not have enough methionine, you will weaken, for example, the immune response. What makes soy so interesting is that the methionine intake is perfectly adjusted to our needs. So we are not going to generate, for example, homocysteine. And there is enough of it for the immune system to function optimally. Another advantage of soy is that it contains a lot of arginine. Arginine is not an essential amino acid, but is interesting, and soy contains more of it than we need. This excess arginine is broken down in the body into what is called nitric oxide, which is a vasodilator. It will therefore dilate the arteries, allow better circulation of the blood and it will, for example, prevent advances or cardiovascular diseases.