Caution for type 2 diabetics

For anyone who uses fish oil capsules to supplement omega-3 fatty acids, I have a word of caution for those who have type 2 diabetes.

A new study from The University of Western Australia in Perth, Australia, set out to determine if the omega-3 fatty acids found in fish oil – eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) – have an effect on insulin sensitivity.

Over a period of six weeks, 59 type 2 diabetic subjects took 4 grams per day of EPA, DHA, or olive oil. The researchers found that EPA and DHA had negligible effects on insulin levels, but that blood sugar levels increased with both.

This is the first indication I’ve seen that omega-3 fatty acids can have adverse effects. But the 4 grams per day used in the study is considered a high dose. So for most of us, moderate intake of omega-3 EPA and DHA through fish oil supplements should do no harm – and in fact will most likely do a world of good. But type 2 diabetics should take special efforts to closely monitor blood sugar levels when using this supplement.

Here, at least, is one example of a “gray area” that gains more definition when new and useful information is revealed.

To Your Good Health,

Jenny Thompson
Health Sciences Institute