Both DHA and EPA fatty acids which are present in the fish oil capsules are capable of providing all of these benefits to the people. However, there is a caveat. You must be required to select the exact capsule otherwise you will not be able to obtain the complete benefits from it.
The primary thing which you must take a look at is the kind of source of the fish which is being used in producing the capsules. Check if this has been sourced from a heavily industrialized and polluted area in the sea. Or, perhaps the fish is coming from clean waters without any industrial pollution present. This is important since pollution will cause lots of contaminants that will settle inside the fish. Later, this will make their way into the fish oil and eventually into our bodies as we take the capsule. This will be sufficient to negate the advantages of taking fish oil capsule. Always look for a capsule which has been produced from clean water fish.
While making the capsules, try to check for the purification process that is being used. The best kinds are being created with the use of molecular distillation. This process is both expensive and complex and is able to weed out a good number of impurities from the fish oil and will result to a capsule that has truly genuine fish oil. In order to save from the manufacturing expenses, a lot of companies do not really utilize this process.
Finally, you have to take a look at the amount of both the DHA and EPA that are present in the fish oil capsules. The truth is that DHA is the most significant ingredient in fish oil. This is even more costly and difficult to process in comparison to EPA which is exactly the reason why you will see that numerous companies will make use of EPA in the majority of all their capsules.
What can be considered the best fish oil supplements will compose of DHA as the chief component while the EPA will be lesser in amount. Another reason is because our bodies are able to convert DHA easily into EPA if it is necessary but the reverse will not be possible.