Eugene Yao's ranking www.youtube.com/watch?v=hPCcDmvzRMw/
S omega-3 A magnesium l-threonate vitamin D zinc reduces impulsivity and hyperactivity iron B saffron similar to ritalin. saffron better for hyperactivity, ritalin better for inattention. saffron + ritalin is better than each alone. C ashwagandha lowers cortisol and improves focus L-theanine improves sleep. L-theanine plus caffeine improves ADHD D probiotic creatine F caffeine doesn't help B vitamins (36 vitamin multi helps but unsure why) lion's mane? improves brain function with MCI tyrosine doesn't help