Eating enough healthy fats is great for brain and heart health , but new research has possibly provided even more evidence for adding them — particularly omega-3s — to your diet. A higher omega-6 to omega-3 ratio is associated with a greater risk of dying,” said Yuchen Zhang, lead author of the April study published in the journal eLife, in a news release. Zhang is a doctoral student in the department of epidemiology and biostatistics at the University of Georgia’s College of Public Health. Omega-3 fatty acids are naturally found in foods including fish — especially fatty fish such as salmon, tuna and sardines — as well as flaxseed, walnuts, chia seeds and in dietary supplements such as fish oil .