NOW Foods DHA-500 Double Strength delivers 500 mg of DHA (docosahexaenoic acid) per softgel — double the DHA content of standard fish oil capsules — making it a concentrated brain and eye health supplement specifically for those who want high-dose DHA without proportionally large EPA intake. DHA is the dominant structural omega-3 fatty acid in the brain (comprising 40% of brain polyunsaturated fatty acids) and retina (60% of retinal PUFAs), making it uniquely critical for cognitive function, visual acuity, and neurological development. It is particularly important during pregnancy and early childhood for fetal brain development, and throughout life for maintaining cognitive performance and reducing age-related decline. NOW Foods double-strength DHA is molecularly distilled for maximum purity, tested for freshness and contaminants, and provided in a convenient once-daily softgel.