Parkinson's Disease

Parkinson's disease is a progressive neurodegenerative disorder affecting movement, caused by the loss of dopamine-producing neurons in the substantia nigra region of the brain. The disease develops gradually, often starting with a barely noticeable tremor in one hand, and progresses to affect movement, balance, and coordination.

The hallmark of Parkinson's is the accumulation of alpha-synuclein protein (Lewy bodies) in brain cells, leading to neuronal death. This process is driven by oxidative stress, mitochondrial dysfunction, neuroinflammation, and impaired protein clearance mechanisms.

• Dopamine depletion: Loss of dopaminergic neurons disrupts the basal ganglia circuitry that controls smooth, coordinated movement.
• Neuroinflammation: Chronic activation of microglia releases pro-inflammatory cytokines that accelerate neuronal damage.
• Mitochondrial dysfunction: Impaired energy production in neurons makes them vulnerable to oxidative damage and death.
• Gut-brain axis: Growing evidence suggests Parkinson's may begin in the gut, with alpha-synuclein pathology spreading via the vagus nerve to the brain.

Symptoms include: tremor at rest, bradykinesia (slowness of movement), muscle rigidity, postural instability, and non-motor symptoms like depression, sleep disorders, constipation, and cognitive decline.

Metabolic and dietary interventions show promise. The ketogenic diet provides ketones as an alternative fuel source for energy-starved neurons and has shown improvements in motor and non-motor symptoms. Fasting activates autophagy, which helps clear accumulated alpha-synuclein and damaged mitochondria. Reducing inflammation through low-carbohydrate diets may slow disease progression by decreasing neuroinflammation.

Parkinson's disease worsens with chronic inflammation, insulin resistance, and oxidative stress, while metabolic interventions that enhance mitochondrial function and reduce inflammation may help protect remaining neurons.