Good afternoon! If you are looking for a natural remedy to improve your mood and concentration, I would recommend a product called Normotim http://localsdaily.com/classified/normotim-listing-44536.aspx. This is a modern remedy that, judging by reviews, helps to cope with depressive moods and stress, as well as improves the overall psycho-emotional state. Many users note its effectiveness and positive impact on the quality of life. You can find this product in specialized stores or order online. There is quite a lot of information on the site, so you can familiarize yourself in detail before applying directly for the product. Good luck!