Our expert says:
I would probably choose the Natrodale B complex, but you can select anyone of the many products because they are all very similar. The main thing is to ingest all the B complex vitamins together because they enhance each other's function. If you have problems concentrating then you also need to get sufficient rest, eat a balanced diet, and do regular, daily exercise like going for a brisk walk for 30 min a day. The exercise will supply your brain with lots of oxygen that it requires to function properly and also help you to relax.
Good luck with the studies
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