To improve concentration, you can try a few non-pharmacological measures. Make sure you have eaten well and are well-rested before starting work or school. Psychotherapy with a psychologist or meditation can also be helpful. There are apps and guided meditation sessions available on platforms like Youtube that can assist with meditation practice. Some natural health products, like those containing Vitamin B6 and Magnesium, may also be beneficial. However, it's important to consult a healthcare professional before starting any new supplements, as they may interact with medications. If these strategies don't work, it would be advisable to consult a doctor for further guidance.