Marine lipids, primarily in the form of omega-3 polyunsaturated fatty acids (notably EPA and DHA), are scientifically validated for their role in supporting the nervous system. Numerous clinical and epidemiological studies have demonstrated that omega-3 fatty acids are critical for the structural integrity and function of neuronal membranes. DHA, in particular, is a major component of brain phospholipids and is essential for normal neurological development and maintenance throughout life.

Evidence indicates that higher dietary intake or supplementation with marine lipids may benefit a variety of neurological functions. Randomized controlled trials and longitudinal cohort studies have shown associations between omega-3 intake and improved cognitive function, slower cognitive decline in aging populations, and reduced risk of neurodegenerative disorders. For example, a 2016 review in Frontiers in Aging Neuroscience highlighted the role of omega-3s in modulating neuroinflammation, synaptic plasticity, and neurogenesis. Additionally, some studies suggest that omega-3 supplementation can alleviate symptoms in mood disorders, such as depression, by impacting neurotransmitter pathways and reducing inflammatory markers.

However, while the overall evidence supports the use of marine lipids for nervous system health, results can vary depending on dose, population, and specific neurological outcomes measured. Thus, the evidence is rated 4 out of 5, reflecting strong but not unequivocal support.