Fish oil supplements have become very popular. Many people are taking them and most people know at least somebody else who is taking them. But how can we tell which fish oil capsules or tablets are the best? Here are three key things you should consider.

1. Oxidation. The polyunsaturated fatty acids, EPA and DHA, the most important constituents of fish, are very fragile, and can be easily damaged by light, heat or improper storage. Make sure that the supplement you buy is in an opaque, sealed container. Also make sure that the oil is encapsulated and contains vitamin E, or tocopherols. The various forms of vitamin E act as a natural preservative that protect the fish oil from damage.

2. Purity. Most of the waterways in the world are now polluted. The food chain in the oceans, lakes and rivers is contaminated with heavy metals and toxic industrial chemicals. Fish oil capsules are made by taking whole fish and squeezing them to get out their oil. So it is of paramount importance that the fish used to make the oil be from the cleanest seas possible and free of contaminants.

3. Certificate of analysis. Make sure that the company you buy from has a certificate of analysis available to the public. This certificate will show you how much of the active ingredients the capsules actually contain as well as showing the amounts of toxic chemicals and metals found during testing. If a company doesn't offer you the chance to see this certificate, then don't buy from them. Quite a few omega 3 supplements on the market, some of them very famous, have tested positive for toxic substances like mercury.

Unfortunately, there are many companies out there trying to take advantage of people who want to improve their health. Many products, including some very popular ones, have tested positive for heavy metals and have been found to be oxidized or otherwise damaged in some way. I advise you to keep the three pieces of advice above in mind when you're making a decision and you'll avoid all of the low-quality, bad products on the market today.

Author's Bio: 

Sector rotator. Natural health and biophysics devotee. I enjoy mountaineering, baguazhang, learning interesting things and the music of Piazzolla.

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