The NAD/Sirtuin combination influences a wide range of cellular processes such as aging, rRNA transcription, mitochondrial biogenesis, apoptosis, inflammation, stress resistance, and insulin sensitivity.
Those participants in the study with the lowest levels of vitamin D in their blood had a substantially higher risk of developing Alzheimer's and all other forms of dementia.
The positive effects of exercise, sleep, and moderate alcohol consumption on our brains and on cognition is real and measurable. The exact mechanisms for these positive effects is less clear, but the connection to the glymphatic system gives us at least some explanation for why they work.
Omega-3 fatty acids are the basis of compounds that regulate inflammation, protect neurons, and promote neurite growth. Omega-6 fatty acids promote inflammation before they eventually get around to regulating inflammation.