How effective is omega-3 long chain polyunsaturated fatty acid (PUFA) supplementation for the prevention of dementia and cognitive decline in cognitively healthy older people?
None of the studies examined the effect of omega-3 PUFA on incident dementia. Longer-term studies may identify changes in cognitive function. Omega-3 PUFA supplements may have other health benefits.
Evidence from observational studies has suggested that diets high in omega-3 PUFA may protect people from cognitive decline and dementia. Oily fish, such as salmon, mackerel, herring and sardines, are a rich source of omega-3 PUFAs, which are essential for brain development.