Diminished sleep has long been linked with development of a litany of diseases and biological declines, from cardiovascular disease, diabetes, obesity and immune system function to memory, learning and cognitive function. While that list alone suffices to soundly place sleep as a foundation of healthy aging, new research connecting sleep with Alzheimer's disease may reveal it as the keystone.

And yet, the connection between sleep and conditions directly related to aging would seem clear to everybody but the supplement industry. Sleep and aging appear together on no label we could find. With dementia and cognitive function a primary concern for an aging population, the link to sleep seems conspicuously ignored. Instead, claims of support for neurotransmission.

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