Poor mental functioning and concentration could be brought about by many factors. Here's a look at some of the ones that are good for the brain. The best way to get it is by taking fish oil supplements. As for the development of the fetal brain, the first trimester is crucial. So gingko biloba has its place but not as a youthful brain. L-Tyrosine, 5-hydroxytryptophan, Choline, DMAE, DHA from...