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Researchers found that amyloid plaques, a key feature of Alzheimer's, trap lithium carbonate (a form of lithium used to treat bipolar disorder), which then impairs the brain's immune cells. These cells become less effective at clearing plaques, leading to more lithium being trapped and worsening the condition.
The study suggests that lithium orotate, a different form of the mineral, is able to bypass the plaques and reach the neurons. In mouse models, a lithium-deficient diet led to increased amyloid plaques and other Alzheimer's-like symptoms. Conversely, low doses of lithium orotate nearly halted plaque formation in young mice and reduced plaques by 70% in older mice, resulting in a full recovery of cognitive function. Mechanism of Action: Lithium helps regulate a protein called GSK3 beta, which, when overactive due to lithium depletion, can lead to issues like tau phosphorylation and inflammation.
It is suggested that lithium orotate should be considered an essential micronutrient for brain health. The next step is to conduct human clinical trials to test the cognitive protective effects of lithium orotate.
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1. Taurine in Neurons
Taurine is considered the most abundant free amino acid in the brain. Its presence and behavior in neurons are heavily documented:
• The Astrocyte Connection: Brain taurine is synthesized predominantly in neighboring support cells called astrocytes. Astrocytes metabolically couple with neurons, passing them a precursor (hypotaurine) which neurons convert into active taurine.
• Function in Neurons: Inside and around neurons, taurine acts as a powerful neuroprotectant, organic osmoregulator (controlling cell volume), and antioxidant.
• Neurotransmission: It is released into the synaptic space as a neuromodulator, binding to GABA and glycine receptors on neurons to calm hyperexcitation and prevent cell damage.
2. Luteolin in Neurons
Luteolin is a natural flavonoid found in vegetables like parsley, broccoli, and carrots. It is not manufactured by human brain tissue, but it is routinely detected within neuronal structures following ingestion:
• Crossing the Barrier: Luteolin is highly lipophilic, allowing it to cross the blood-brain barrier and directly enter brain tissues.
• Intracellular Action: Once inside the brain, luteolin directly interacts with hippocampal and cortical neurons. Research shows it accumulates within neurons to inhibit harmful signaling pathways (like mTOR/NF-κB), block tau hyperphosphorylation, and prevent glutamate-induced neuronal death.
• Microglial Intermediation: In addition to entering neurons directly, luteolin acts heavily on microglia (the brain's immune cells) to stop them from secreting toxins that kill nearby neurons.
