Yes.. go with IFOS verified brands - I think Malaysia has two: Pristin and Barlean's. IFOS is an independent tester that tests fish oil brands for 1.) their stated omega-3 content and 2.) amount of harmful toxins. Only brands that pass both tests will get IFOS Certification.

When choosing fish oil, take into account the omega-3 content. Most fish oil says 1000mg on the front label, but if you check the label at the back, it says 300mg of omega-3.

These fish oils are typically the cheapest because the technology involved is the most economical. As a result you get 30% omega-3 (300mg in 1000mg). Nothing wrong with them though, you just have to take more capsules. I personally recommend at least 600mg omega-3 a day. If you have heart conditions, then you might consider a higher dose at least 900mg a day.

Some brands use more expensive technology and the omega-3 content is more concerntrated. For example, Fisol fish oil that's sold at Caring pharmacy has >900mg of omega 3 per capsule. The price of course is more expensive but you don't have to take as many capsules a day.

In terms of mercury content, fish oil that is molecularly distilled are generally free from toxins - so look for brands that say molecularly distilled on the label.

I personally like to recommend Pristin brand to my customers - it's IFOS certified and contains a fair amount of omega-3 (>600mg if I remember correctly).

Now, I wrote a blog post a while back comparing fish oil, krill oil, salmon oil and flaxseed oil. If you would like to learn more about omega-3 supplements, feel free to have a read and leave a comment if you have any question.