High blood sugar : Research shows that supplementing with high amounts of omega 3 fatty acids could increase blood sugar levels. This is because large doses of omega-3 fatty acids can stimulate the production of glucose, which can contribute to high levels of long-term blood sugar levels.
Bleeding : Bleeding gums and nosebleeds are two of the main side effects of excess fish oil consumption.
Can lower the blood pressure : Fish oil is known to lower the blood pressure. The properties of fish oil can be beneficial for those with high blood pressure, but it can cause serious problems by further lowering the blood pressure for those who have low blood pressure. Fish oil is also known to interact with blood pressure-lowering medications.
Diarrhea : Diarrhea is one of the most common side effects associated with taking fish oil, and maybe especially prevalent while taking high doses.
Acid reflux : Fish oil is high in fat and may cause acid reflux symptoms such as belching, nausea, indigestion, and heartburn in some people.