Have you tried using essential oils to improve concentration? Since ancient times, Rosemary essential oil has been considered the best stimulant of memory and mental activity due to its strong tonic effect. It is enough to take a couple of breaths of this fragrance from the bottle, as you will feel that your head has cleared. Aromatherapists call him "the best friend of a middle-aged manager" for his ability to improve analytical abilities, direct thinking in a rational direction, and for helping in the fight against chronic fatigue syndrome. Please read about it on jordibhealthandfitness.com.