Several specific nutritional medicines have been shown to prevent and reverse cognitive decline. In this book I have included only those with strong research support. At the top of the list lies low-dose lithium, a “magical mineral” that not only reverses Alzheimer’s but has been shown to increase BDNF (brain-derived neurotrophic factor), stimulate neurogenesis, heal TBI (traumatic brain injury) and reverse cerebral atrophy. Anyone who wants to prevent dementia and keep the sharpest possible mental edge should include this mineral in his or her supplement program. (See chapter 27.) Other supplemental nutritional medicines that have been shown to provide basic brain support, enhance cognition, and block or reverse the Alzheimer’s disease process include berberine, B-complex vitamins, curcumin, bacopa, DHA, flaxseed oil, phosphatidylserine, green tea extract, citicoline, and probiotics.