Dispelling nutrition myths, ranting, and occasionally, raving

Supplements: Should you take PGX?


There are so many supplements available that purport to be The Answer to quick and easy weight loss. Of course, if any of them were actually any good, overweight and obesity wouldn’t be a problem anymore. PGX is no different. A quick google search yielded a link to support from Dr. Oz. To me, that’s a huge red flag. If Dr. Oz is pushing it then my skepticism is definitely going to increase.

I went through PGX’s website which claims that it “will change your life”. The website makes several claims about the benefits of PGX, the first of which is that it helps you lose weight. How will it do this? Well, PGX is a viscous fibre and when consumed with water it will increase in bulk in your stomach. The idea is that you take PGX before a meal so that you’ll feel fuller and eat less. In theory, great. In practice, does it really work? Interestingly, while the PGX website makes the claim that their product assists in weight loss there is no link to research supporting that claim. Google scholar doesn’t provide much more information. A couple of studies claim that PGX may be beneficial for blood glucose control and another asserts that it may be useful for short-term weight loss. However, there is nothing to support long-term weight loss and all of these studies were supported by the makers of PGX so I’m inclined to take them with a grain of salt.

While PGX appears to be a safe product, it also appears to be an¬†unnecessary one. Yes, many people could stand to increase the amount of fibre they’re consuming but they’d be better off doing that by adding whole grains, fruits, and vegetables to their diets.

As with most of these weight loss products, PGX is only effective when combined with a healthy diet and exercise. Hmmm… What would happen if you removed PGX from that equation? I’m guessing the same amount of weight loss, although maybe a little less as your wallet wouldn’t be any lighter.

Author: Diana

I'm a registered dietitian from Nova Scotia, living and working in Ontario, Canada. My goal is to help people see food and nutrition from a different perspective and understand that nutrition and health are not necessarily a result of personal choice.

4 thoughts on “Supplements: Should you take PGX?

  1. As a dietitian doing my own research on this product, there has been some reports of bowel obstructions related to PGX – mostly from people not consuming enough water when taking it.


    • Thanks for sharing Amanda!

      This is important for people to know. Dramatic increases in any source of fibre unaccompanied by sufficient fluids can lead to bowl obstructions. If your diet is low in fibre you should always increase gradually and ensure you consume plenty of water.


  2. Thanks for this. I took PGX for a while, on the recommendation of someone who usually knows better. I decided to trust their judgement despite my usual scepticism towards any type of magic pill. I stopped using it, because I didn’t feel PGX was doing all that much for me. In fact, I got used to the bloated feeling and just ate right over it. (I know that sounds bad — it was).

    There’s an insane amount of pro-PGX hysteria all over the web. It’s good to see my suspicions confirmed by someone with genuine expertise.

    Great blog, by the way. I’ll be back!


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