5 Dangerous Weight Loss Pills and Supplements

Fact Checked On: 4-5-2018 By: Rob Miller

USER REVIEWS 15 USER QUESTIONS74 USER COMMENTS

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As you go about your weight loss goals, if you’re going to consider using a supplement of any sort, you need to be very careful to check on its safety.  Using an unsafe supplement can not only lead to significant side effects but in some cases it can be downright dangerous as well.  Let’s go over some of the main pills that you need to be aware of so that you can be sure to avoid them at all costs.

1.)  Craze Performance Fuel

Craze ReviewCraze is made by a company called Driven Sports, and was actually a highly rated pre-workout supplement.  However, after some recent testing by researchers in a lab in sweden, it was found that Craze Performance Fuel contains an “amphetamine like compound” in samples of their product.  This would explain all of the reviews we were getting from guys saying how “amped up” it was making them feel.

While the manufacturer of Craze has adamantly denied this, the proof is in the pudding so to speak.

Pre workout supplements that have been found to have compounds like this is actually nothing new.  There are tons of other supplements that have also been doing this, in an obvious effort to make them work better.

Amphetamines (or amphetamine like stimulants) can cause a wide variety of side effects, which is one of the reasons why you need a prescription to obtain the.  As of this review, Craze was recently pulled off the shelves of most major retailers, but there are some still selling it out there so be careful!

As an alternative, check out an effective, non-stimulant based pre workout supplement called Nitrocut.

2.)  OxyElite Pro

oxyelite pro real review As you can probably tell from the photo, I actually got a chance to try out Oxyelite Pro myself, with some pretty decent results.  This weight loss supplement actually was sold in a number of popular retailers including Walmart, GNC, and others.  However, after several reported cases of liver problems and even reports of it being linked to Acute Hepatitis, the makers agreed with the FDA to issue a mandatory recall.

It has also been pulled off the shelves of most major retailers, but there are still some reports that it is being sold on Ebay and other outlets, so avoid it at all costs if you come across it.

Check out my top choice for fat burners, Instant Knockout

3.)  Fen-Phen

There was a bit of a frenzy when this pill first came out.  Developed by the pharmaceutical company known as Wyeth, It was being touted as a “revolutionary fat burner”, and had the data to back it up.  Users reported weight loss of as much as 15 lbs. per month, with little to no changes in diet or exercise.

However, over time the adverse effects of this drug started pouring in.  Researchers began investigating reports of potentially fatal pulmonary hypertension and heart valve problems, with over 40 documented cases.  As a result, a highly publicized recall involving Wyeth and the distributor of Fen-Phen was initiated immediately.  There was also a wave of fen-phen litigation, and Wyeth actually announced that it set aside $21.1 billion to cover the costs of lawsuits.

It’s now been completely pulled off the shelves and is no longer available for use.

4.)  VPX White Heat

vpx redline white heat reviewWhile White Heat is used primarily as a pre workout supplement, there are alot of individuals that use it as a fat burner / weight loss supplement.  I’ve actually tried it out myself, and can attest to it’s effectiveness.  However, like many of the other weight loss products on this page, it has a range of side effects.

For one, it contains 3 different types of Yohimbe, as well as 400 mg of Caffeine.  I started off with just half a scoop, and could feel the energy boost kick in within 15 minutes.  However, this energy boost was quickly followed by a number of side effects, including nausea, heart palpitations, fever like symptoms, and body aches.

This is no doubt due to the Yohimbe, which I have take on several different occasions.  It’s important to note that not everyone will experience side effects like this, and if you do decide to try it out I recommend you use the lowest possible dose to assess your tolerance.

5.)  Clen Fat Burner

Finally, the last of the fat loss pills to avoid if you ever come across it is Clenbuterol.This pill is actually originally produced to help treat symptoms of asthma, and has been found to have high thermogenic properties.  It’s because of this reason that it’s become VERY popular with bodybuilders and celebrities who are looking to lose a dramatic amount of weight in a very short time frame.

However, there is a downside to Clenbuterol…there are numerous side effects that can result from its consumption, including: muscle cramps, hypertension, increase heart rate, dry mouth, and vomiting.  Even if you were to use it, it’s highly recommended that you cycle it on a 2 week on, 2 week off basis.  It works, but in my opinion is not worth the side effects and should be avoided at all costs.

So all in all, stay away from all of these fat loss pills.

Make sure you always do your research before starting up any fat burner to ensure it’s something that is safe for you to use.

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User Questions and Answers



Have you looked at GNC "VolcaNO" supplement and its advertized "incredible benefits" ? You are also required to join GNC's VolcaNO VIP Membership program after the 14 day trial. Thanks -Gerald


We had one of our testers try it out and he had pretty good results. You can see our review here. I would recommend you buy it outright from the start instead of using the free trial. Lot's of guys complain of having been ripped off by the trial.- Rob

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What is the best supplement to reduce cortisol and aid in belly fat reduction?. -John


There's really no science supporting the theory that reducing cortisol helps you lose weight. You'd be better off going with a stimulant based fat burner like Instant Knockout that can help you eat less and have more energy to work out.- Rob

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Have u done any research/testing or heard anything about Crevalor and Megatropin stack and its effectiveness or lack there of? Thanks! -Steve


I haven't looked at them specifically, but they're one of those free trial scams that I warn about. You can read my article about that general situation here.- Rob

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How safe is Primal Force Ultra Primal Lean ? -Ashan


I haven't tried it myself or looked at it too closely, but a quick look at the ingredients list says it's probably pretty safe to use.- Rob

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is man power x testosterone capsule totaly safe? -jeet


It should be, but there's no guarantee that you won't experience any kind of minor side effects at all.- Rob

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Have you ever review any of the old school Labs products -Juan


We have an informational review on Vintage Burn. It looks pretty decent, but I haven't tried it myself so I don't know for sure.- Rob

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Hey, is there any credible research on Nugenix Testosterone booster I've been taking?  It has put the "pep back in my step" but I wonder if there are any dangers since it is ingested orally and has to go through liver, instead of injections which don't,just curious. My levels were tested, and Doc said they were normal but I''m not sure hes right, because when I started supplementing with Nugenix I could tell a difference after about a week of being on it. Appreciate what you do. Thanx again! -c.j


I don't know of any clinical research on Nugenix itself, but it shouldn't affect your liver. It's not actual testosterone, and the ingredients in it do not damage your liver.- Rob

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What is your critique of Resetigen-D - Frank


I haven't done a full review of it, but check out our review of Regenify. They're very similar.- Rob

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Do you have a review on this product -Keto os


If you mean Keto OS, yes we do. You can find it here: https://www.supplementcritique.com/keto-os-review-instant-ketosis-for-fat-burning/- Rob

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What supplements could cause tingling hands and feet! -Nancy


Anything with beta alanine can make your skin tingle.- Rob

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What's your opinion of Nugenics? -William


Check out my review and personal results here: https://www.supplementcritique.com/nugenix-review-is-it-a-reliable-testosterone-booster/- Rob

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What's your take on Black Core Edge Max? -Josue


I wouldn't recommend it. Check out our full review here:  https://www.supplementcritique.com/blackcore-edge-review/- Rob

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Hi Rob, Did u hear about Garcinia pure combined with another supplement called vimax detox ? And their effect on fat burning and whether they are safe or not? Many thanx -Mohammaf


I haven't heard of them yet. We don't usually look at cleanses.  We have reviewed several Garcinia products, and I'd say it probably has some effect on fat burning.- Rob

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check BIO.X4 4 DIET PILL IS IT OK -mary


Read our full review here: https://www.supplementcritique.com/bio-x4-nucific-review-is-it-worth-1000-a-year/- Rob

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What is your view of Anabolic Rx24 testerone booster. -altonmark


Not a big fan. You can check out our full review here: https://www.supplementcritique.com/anabolic-rx24-review/- Rob

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Author: Rob Miller

Rob Miller founded SupplementCritique.com over 7 years ago, and has been the chief editor ever since. He has a diploma in Advanced Dietary Supplements Advisor, and worked at GNC for 3 years. He KNOWS supplements, both inside and out. Rob currently resides in Jupiter, FL, with his wife of 4 years.  Learn more about him in his Bio here. Follow him on Twitter , Facebook, LinkedIn, or find him on Google +.