Fish Oils are a great source of essential Omega-3 fatty acids which are found in oil fish such as Mackerel, Salmon, Herring and Trout . They are essential as they cannot be made in the body and are valuable and renown for their heart health, circulatory health, vascular health, brain health, and skin health properties to name a few. Fish Oil supplements are an ideal way of increasing your intake of these essential fatty acids, without having to eat large amounts of fish which may result in high intake of heavy metals.