Fish oil is a dietary supplement derived from fatty fish like salmon, mackerel, sardines, anchovies and tuna. Its main active ingredients are two types of omega-3 fatty acids: EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid).These are essential fatty acids, meaning your body can’t produce them on its own—you must get them through diet or supplements. While fatty fish and certain seafood (like oysters and sea bass) are excellent sources, you can also find smaller amounts of omega-3s in plant-based foods like flax seeds, seaweed, and walnuts.Omega-3 fatty acids, especially EPA and DHA, are critical to overall health. Research shows they support:
- Cardiovascular function
- Brain development and cognitive health
- Immune system regulation
- Nervous system maintenance