4 stars because I haven't used any other. Starting the intake of the powder (2 teaspoons before breakfast) for about 10 days, you don't notice the difference. Gradually, however, in about a month, you start to realize the work it does on your whole body and mind. The defense really skyrockets. I used it for two months and then stopped. A week later, I said, "Slowly, I feel the same again." However, during the one-month break, I realized how much I declined physically, I got sick but mildly. But the most important thing is that my memory really weakened a lot and I realized how good of a job it was doing. It goes without saying that it needs to be accompanied by a proper diet. I wonder how much more the other products can offer with double and triple the price....???? What is certain is that it does the job and systematic intake gives a lot. Indeed, when taking the powder, caffeine doesn't do much in comparison.

Info:
In case it is given to children, always give the minimum quantity and not for a long period of time. I have noticed that it creates overstimulation with some kind of spasms, the known tics, and because the action of the powder is long-lasting, they take time to subside. This also applies to powder from the producer. So be careful.....