After a couple of weeks of taking fish oil capsules, you might notice some fishy burping before and after each meal. This can just be because your body is still adjusting. Give it a couple of days and the burping might stop. Although, you should check the expiry dates of your of your supplements. You might also want to consider that what you have been taking are bad quality produce. Changing brands might help. Some suggest keeping the supplements in a freezer to prevent the various gastrointestinal side effects.
On the other hand, blood thinning is something that you cannot eliminate by just simply changing brands. You see omega-3 from fish oils is great for the heart because it is a natural blood thinner. They help coagulate the blood which helps prevent blood clots which helps prevent heart diseases.
But because omega-3 is already a blood thinner, people who are already taking blood thinning medications should avoid the intake of either the fish oil or the blood thinning drug. The possible problem with this is that people will get too much blood thinners resulting to patients bleeding out. The bleeding could be internal which can damage organs and could result to something fatal.
You should watch out for signs of internal bleeding like black stools or the presence of blood in the stool or vomiting of blood which are all signs of gastrointestinal bleeding. When you bleed in the brain the signs could be changes in your vision or speech, numbness of an arm or leg, and severe headache.
The dark side of fish oil is just that, one part of a fairly good supplement. There are ways to prevent the side effects and most of them through proper consultations before you even start taking those fish oil supplements.