Updated: 07/11/2017 - Site sponsored by Dietspotlight Burn

PGX Review- Does This Weight-Loss Ingredient Work?

  • 10 User Comments
  • Rating: 3.5. From 37 votes.
By Summer Banks Jun 08, 2017

A diet product’s worth depends on whether it actually helps people lose weight. Let’s find out if PGX really works. Our in-depth review focused on the ingredients, side effects and scientific studies. Furthermore, we examined hundreds of user comments and forum posts. Lastly, we condensed and refined to give you the info you need.

PGX Readers: Click here to find out why we're giving away samples of our product, Dietspotlight Burn.

What is PGX?

To start with, PGX is an ingredient used in dietary supplements. The ingredients include PolyGycopleX, a water-soluble polysaccharide made from konjac root. You’ll take it according to the directions on the label. It supposedly balances blood sugar levels, reduces appetite and helps with weight-loss.

The company behind PGX products is InovaBiologic Inc. When used in supplement form, it’s available through various retailers. We like that it provides a source of fiber and that we found some positive customer comments, but read on…

PGX Side Effects – “Concerned?”

The first concern we have is with PGX side effects. “Fiber can expand the stomach,” said our Research Editor. “But taking too much could lead to adverse reactions.”

One user stated, “I can say that after 4 months I have gained 5lbs, instead of loosing that. Side effects are constipation and gas for a couple of months until you adjust to taking it.”

Another commented, “Definitely upsets my stomach.”

While some users experienced side effects, there are reviews of PGX talking about no reactions.

“No side effects for me. Increases regularity, but very expensive,” posted another.

Minimal Results – “Another Drawback”

According to PGX reviews, not everyone noticed results. One customer reported, “Doesn’t do what it says. Extra calories into your diet without results.”

A user said, “Seems to do a pretty good job living up to its claims.”

Another commented, “May help with using the bathroom. But I don’t really feel this one suppresses my appetite.”

According to our research, if there is a certain facet of a diet supplement that’s problematic, like causing adverse reactions, the likelihood of long-term success is slim. Therefore, if PGX products do in fact lead to negative side effects, this could be a serious dilemma.

The Science – “Is There Any?”

We were able to find some research that supports PGX supplements for lowering cholesterol levels and promoting more regular bowel movements. However, we could not pinpoint any studies that tie this product to weight-loss. At DietSpotlight, while solid science is critical to the review process, there’s an issue when there’s no evidence to connect it to weight-loss.

The Bottom Line – Does PGX Work?

So, should you run out to the store and buy a PGX product? Well, we like that it contains fiber to promote regularity and may help lower cholesterol and blood sugar levels. However, we have some reservations about this one because there’s no available science used to connect it to weight-loss. Also, we’re concerned about the negative side effects and lack of results mentioned by users.

If you’d like to lose those extra pounds, we suggest going with a supplement containing ingredients shown to help promote weight-loss and backed by positive customer comments.

Among the best products we’ve seen this year is one called Dietspotlight Burn. This supplement uses a blend of four clinically-tested ingredients, which have been shown to help spark metabolism and speed up fat loss. We can’t locate user feedback about harmful side effects and comments are showing that people are seeing great results.

The makers of Dietspotlight Burn are so confident about their product, that they’re offering a Special Trial Offer.

Previous PGX Review (Updated August 7, 2013):

What You Should Know about PGX

PolyGlycopleX, commonly referred to as PGX, is a fiber that comes alone or as an ingredient in weight loss shakes or other dietary products. One website we found stated that it was discovered by the University of Toronto and tested at the Canadian Center for Functional Medicine in Coquitlam, B.C. We could not find a link to the manufacturer's website.

List of  of PGX Ingredients (in a capsule product)

  • Amorphophallus konjac K
  • Koch root
  • Sodium Alginate
  • Xanthan Gum

Product Details

The claims about this dietary fiber are that it is highly soluble and absorbs 600 times its weight in water. It promotes regularity and fills you up. We could not find the manufacturer website, and it may be that this is an ingredient used by multiple manufacturers in various products.

The Good about PGX

  • If it works as promised, it may help you eliminate waste, resulting in temporary weight loss.
  • this is a heavily marketed product available through a lot of independent retailers.

The Bad about PGX

  • We could not find a company website for PolyGlycopleX. The only information came from independent sellers.
  • There are no free trials available.
  • Taking this product would require additional water intake. Taking it without adequate hydration could be dangerous.


We do not recommend this product. We found no manufacturer website, so the manufacturer is largely unknown and the information can't be verified. While fiber is a healthy part of any diet, we recommend a diet and natural sources. Artificial fiber works much like a laxative, aiding waste elimination and cleaning out the colon. People on a healthy diet with a lot of fruits, nuts, vegetables and whole grains do not require colon cleansing and need no supplement to maintain healthy elimination.

Adding large amounts of fiber to a diet can cause gastric distress, gas, and the need to use the bathroom suddenly and at inconvenient times. The recommended daily amount of fiber for an adult is about 25-30 grams, and many foods contain plenty of fiber. Eating fiber rich foods like broccoli, sweet potatoes, dark green leafy vegetables, squash, nuts, oatmeal, apples, blueberries, raspberries, whole grains or beans every day will keep you regular and give you a healthy balance of nutrients to satisfy your hunger. There's no point in losing weight if you wind up unhealthy with bad eating habits. Losing weight while creating a healthy, sustainable lifestyle is a much better choice.

Instead of interfering with your gastric functions, get your fiber through healthy food choices as nature intended. Find a brand of products with an appetite suppressant or fat burner to supplement your healthy, balanced diet.

Learn More About Dietspotlight Burn »
Summer Banks Dietspotlight Author
About the Author:

Summer Banks, a content strategist at Dietspotlight, has researched over 5000 products in the past 10 years. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

Rating: 3.5. From 37 votes.
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Leave a comment or review

  Will discontinue ?
Mark (Verified User)

I started it today and I am really bloated. I will not be continuing with this stuff.

  cannot find any direction
Gregg (Verified User)

been using PGX for 3 weeks now…. for the second time. First time I tried to ease into it by using half dosage. Didn’t work – so now am taking recommended dosage – Was loosing approx a pound a day but had a little hiccup with food intake but am back with a steady loss. My concern is what happens when I hit my target – quite cold turkey? Taper off back to minimal dose? take for the rest of my life? I cannot find any direction on this.

  Stay away from TV ads that promote these kinds of things.

It is always a safe practice, before taking any of these advertised ‘Cure Alls’ to consult with your family Doctor. I have also talked with my pharmacist and dietician and they say, don’t believe anything these ads tell you. They are trying to sell a product and make money. They don’t tell you the side effects, generally speaking, about what people experience, good or bad, by taking their product. Best procedure is to stay away from TV ads that promote these kinds of things. They probably are going to do you more harm than good.

  There is NO substitute for exercise!!
Emma Peele (Verified User)

PGX is made by a reputable company Webber. It works, no bloating, water retention etc. I think this site is flogging its “Top Rated” diet aid as well as some belt for your abs. What a crock….there is NO subsitute for exercise!!

  Suitable for diabetic
Adrian (Verified User)

PGX is not intended for weight-loss. It was designed to slow down post-prandial glucose absorbtion for diabetics.


I have been taking PGX about 2x/day for the last month or so, especially to slow down post prandial glucose, which I believe works. I have been taking only 1 at a time before meals but serving size is 2, so today I took a total of three. I like to ease into this things. Anyway, I have had no problem with stomach discomfort and I don’t have cravings or that hungry feeling I used to get. I have learned to eat healthy, so this works fine for me. I have lost about 4 lbs, am a slow to lose but I like it that way. I don’t know if it’s the PGX or otherwise, but I have no complaints with it.

  Product just wasn't for me
Kim (Verified User)

You made the right decision Renee – I also had a lot of bloating, constipation, felt water retention, puffy. And I took half the recommended dose from the beginning to ease in to it. Good decision to scrap it.

  Any issues with retaining water?
Renee (Verified User)

Anyone have a problem with retaining water? I’ve had swollen hands and ankles since taking this product. When I stopped the water went away.


I gained 4 lbs in one week with pgx daily, and i woke up with puffy eyes. Im going to the doctor tomorrow.


I’ve used PGX and hated it. I already have a very healthy diet, and wanted a bump to get over a weightloss plateau. Much to my dismay, all I felt was bloated and constipated, even with gradual dosage (not full amount from beginning). I felt puffy and retaining water too. As soon as I stopped taking the product, I felt much better. Good decision.