Anti Oxidants C and E help preserve LTP in and prevent damage from reactive oxidant species caused by stress, age and immune response 1

Neuronal death in the brain, as in Alzheimer's disease is aggravated by factors that cause inflammation.  Anti-inflammatory substances or avoiding things that cause inflammation, such as allergy foods, help preserve neurons.2

Homocysteine Elicits a DNA Damage Response in Neurons That Promotes Apoptosis and Hypersensitivity to Excitotoxicity.3