Side effects of fish oil is a question more and more people are asking as this is becoming a popular supplement. It is now clear from scientific research of the importance of Omega=3 in a person’s diet. But with only a coupled of exceptions, the only place a person will get this is from fish and many people do not want to eat fish for various reasons. Fish oil in the form a capsules can be taken daily just like a vitamin pill. But what problems have people had using them? The short answer is none. But when you dig down into the data that has been kept you will find that there are people who have had negative reactions to the capsules, but they are not dangerous side effects. The most common complaints have been nausea, along with heart burn. There have been a few rare cases reported of nose bleeds.