Energy balance
Ketone bodies (beta-hydroxybutyrate and acetoacetate) serve as an effective alternative fuel for the brain in aging and Alzheimer's Disease because ketone uptake remains normal even when glucose uptake is impaired.
Your brain can switch to burning ketones for fuel even if you have early Alzheimer's or cognitive decline. This metabolic flexibility exists, which is why strategies that raise ketone levels (like ketogenic diets or MCT oil) are being explored to support brain function in aging.
Regional brain glucose uptake is impaired in AD and mild cognitive impairment (MCI), but brain uptake of ketones (beta-hydroxybutyrate and acetoacetate), remains the same in AD and MCI as in cognitively healthy age-matched controls.
Why this rating
Supported by PET studies using 11C-acetoacetate and arterio-venous difference methods showing preserved ketone metabolism in AD.
Source
Can Ketones Help Rescue Brain Fuel Supply in Later Life? Implications for Cognitive Health during Aging and the Treatment of Alzheimer’s Disease
Stephen C. Cunnane et al. · Frontiers in Molecular Neuroscience · 2016
DOI 10.3389/fnmol.2016.00053
More from this paper
- In older adults and those with insulin resistance, brain glucose uptake is significantly reduced (hypometabolism) in specific regions (frontal, temporal, parietal cortex), creating an energy deficit that precedes cognitive decline and Alzheimer's Disease.Good
- Interventions that raise ketone availability (via MCT oil, ketogenic diets, or ketone esters) improve cognitive outcomes in individuals with Mild Cognitive Impairment (MCI) and Alzheimer's Disease (AD).Moderate
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