DHA is a major structural and functional building block of the brain – about 30% of the structural lipids of the grey matter are DHA. A change in the fatty acid composition of synaptic membranes can affect the functions of neuronal membrane receptors, ion channels and enzymes. DHA is required during foetal and child development for the growth and functional development of the brain. In adults, DHA maintains normal brain function, and scientific evidence links reduced DHA levels to mental and neurological health concerns.