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A 28% lower risk of dementia and better scores on tests for memory and linguistic abilities was associated with a high intake of dietary phosphatidylcholine mainly from eggs and meat in men.
Choline is an important precursor to the neurotransmitter acetylcholine which plays an important role in cognition. Phosphatidylcholine is a very important component of cell membranes that make up neurons and also combines with the omega-3 fatty acid DHA to form lysophosphatidylcholine DHA which is transported across the blood-brain barrier. I published a paper last year on the important role DHA in phosphatidylcholine form plays in preventing Alzheimer’s disease particularly in people genetically predisposed to the disease.
This new study was an observational study so causation cannot be established. Future clinical trials need to be done before definitive conclusions can be made.
Link to my study on DHA and Alzheimer’s disease: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6338661/