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Plasmalogens, a type of phospholipid (i.e., a compound made up of a fat and a phosphate group), are marketed as supplements to improve cognitive function and focus, support memory, and reduce brain fog, especially in older adults. While there is some preliminary evidence that plasmalogens play a role in brain function, the evidence for it being useful as a supplement for people is very limited, including a very preliminary clinical study published in 2022.

At the same time, the cost for plasmalogens is relatively high for a supplement ($2.50 or more per daily serving for products such as NeuroREGAIN, NeuroPlas Plasmalogen Complex, ProdromeGlia, and ProdromeNeuro).

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