Hi Ricardo, Thank you for trying Qualia Magnesium+ and for your feedback. Magnesium supplements aren’t necessarily noticed or felt. Whether or not a person would notice a benefit can depend on many interacting factors including their magnesium status when beginning supplementation, diet, exercise levels, sleep habits, stress, use of medications, and other factors. That said, some of the most common benefits that users may experience when taking Qualia Magnesium+ include support for calmer moods, easing tense muscles, promoting restful sleep, soothing feelings of stress, and facilitating recovery from exercise.* We do offer moneyback guarantee as well, which allows our customers to try the product risk-free for four weeks, and claim a refund if they are not happy with the results within 100 days.