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Yellow Devils Review - Does This Diet Pill Actually Work? Are ineffective ingredients and side effects deal breakers?

By Summer Banks on Sep 30, 2016
Yellow Devils Review

This review is what happened after I obsessed for weeks over Yellow Devils. We at DietSpotlight took the time to create a detailed review, looking closely at the ingredients, side effects, clinical research and level of customer service. Furthermore, we sorted through dozens of user reviews and dieter comments from all over the web. Lastly, we compressed the facts and details we found to give you the info you actually need.


What You Need To Know

First Off, Yellow Devils is a supplement created by American Generic Labs. This product is claimed to increase metabolism, provide maximum energy and encourage fat burning. You only need one capsule per serving. Yellow Devils ingredients include ephedra, caffeine anhydrous, bitter orange, capsicum annum fruit, kola nut seed, eleutherococcus senticosus root, acacia rigidula, phenylethylamine hcl, theobromine anhydrous and quebrach bark.

It’s unclear when Yellow Devils were first released, but this product is available on the company website for $59.99 (100 capsules). This supplement does contain some natural plant extracts and there is a 60-day return policy provided on the website, but read on…

Ineffective Ingredients – “Concerning?”

The first concern was the ineffectiveness of Yellow Devils ingredients. According to our Research Editor, “Some of the ingredients listed are natural and thought to be effective. We found that customers may tell a different story.”

One customer stated, “Not sure what’s in these, but I’m not losing weight.”

Another user mentioned, “I’ve taken Yellow Devils for a month straight and haven’t lost one pound.”

Side Effects – “Not Good!”

Customers through the web are reporting the intensity of Yellow Devils side effects. One customer commented, “My heart races when I take this and I feel sort of dizzy.”

“This pill is not good. Trust me. My heart was racing,” commented a customer.

“I took it for one day and then no more. Crazy side effects,” said another user.

The research we’ve conducted has shown if there is a certain part of a diet pill or program that is especially concerning or troublesome (dangerous ingredients, serious side effects, steep price tag) the odds of long-term success are not very good. This means if Yellow Devils do in fact cause serious side effects in a lot of people, this could be a major dilemma.

Is There Any Science?

Clinical studies and scientific research are not addressed on the official website for Yellow Devils. This is not surprising because this product does contain ephedra, a banned ingredient. For us at DietSpotlight, we like to see documented research that backs up the diet product and its ingredients.

The Bottom Line – Do Yellow Devils Work?

So, should you run out and buy Yellow Devils? Well, we like that Yellow Devils contain some natural ingredients and there is a 60-day return policy posted on the official website. However, we have some doubts about this diet pill because it’s not backed by actual science. Moreover, we’re concerned about the ineffective ingredients and negative side effects..

If you’d like to get rid of more excess pounds, then we encourage you to select a product that does not contain any dangerous ingredients, does not lead to harsh side effects and is backed by solid science.

Among the best products we’ve seen in 2016 is one called Leptigen. This supplement uses a proprietary blend of four unique ingredients, which have been proven in documented clinical research to help speed up fat loss and elevate metabolism. We can’t find any complaints of harmful side effects and dieter comments found online express people are seeing great results.

The makers of Leptigen are so satisfied with their product they’re offering a Special Trial Offer, which is a good sign.

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About the Author:

Summer Banks is an ISSA-Certified Fitness Nutrition Specialist and has reviewed over 2000 diet products. 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.

How Does Yellow Devils Compare?

Previous Yellow Devils Review (Updated October 20, 2010):

What You Should Know

Yellow Devils is a strong fat burner by American Generic Labs claiming to include 25 mg of Ephedra Extract. Ephedra has been banned by the Food and Drug Administration in the United States for several years, but many supplements sold today online offer Ephedra as an ingredient despite the ban. Either the supplements do not continue true Ephedra or the companies are selling products illegal in the United States.

List of Ingredients

Ephedra, Caffeine.

Product Features

Yellow Devils offers only two ingredients, but those two ingredients are the strongest fat burners ever created or used in a weight loss supplement. There are 300 mg of caffeine in Yellow Devils, making it pack a stronger punch than three to four cups of coffee in one serving. This is far too much caffeine for most dieters as only a select few will have the caffeine tolerance needed to withstand 300 mg of caffeine. Interestingly, the warning for Yellow Devils claims users should discontinue use if nausea occurs. Nausea is a common side effect of caffeine overdose. ‘

The second and final ingredient is Ephedra. At 25 mg, Yellow Devils packs a strong punch of this proven fat burner. Will the supplement cause weight loss, yes – without a doubt. But, it may also cause heart problems, stroke and death. The same warning that suggested stopping the supplement with nausea goes on to warn dieters that “heart attack, stroke, seizure, and death” are associated with Ephedra intake.

Many dieters want to know how a supplement can still contain Ephedra and be legal in the United States. There is a plant with the same Ephedra name – a cousin to stimulant Ephedra if you will – that has no effect on weight loss at all. The bush does not even have stimulant properties. This ingredient can be added to any supplement and the claims of containing Ephedra are both correct and legal.

If this supplement includes the bush form of legal Ephedra, the only weight loss benefits will come with the 300 mg of caffeine. Stimulation causes increased calorie burn and hunger. That is why proven supplements also include an appetite suppressant in the formula. Yellow Devils contains no appetite suppressant.

Yellow Devils sells for $59.99 from the official American Generic Labs website.

See Our Featured


  • Caffeine can increase weight loss.


  • Ephedra is illegal and bush Ephedra does not increase weight loss.
  • The company uses the Ephedra name to increase sales.
  • Too much caffeine can cause jitters, nausea, vomiting and racing heart beat.


This supplement uses deceptive practices to lure in dieters look for Ephedra. If the company is regulated by the FDA, as stated on the official website, the Ephedra placed in this supplement is an ineffective cousin to the real thing and will not increase weight loss.

Yellow Devils Questions & Answers:

We boiled down hundreds of user comments about Yellow Devils into this helpful FAQ.

What are the side effects of Yellow Devils?

Yellow Devils side effects, based on user reviews, may include dizziness, jitters, anxiety, chest pain, nausea, headache and upset stomach.

What are the ingredients in Yellow Devils?

Yellow Devils ingredients include ephedra, caffeine anhydrous, bitter orange, capsicum annum fruit, kola nut seed, eleutherococcus senticosus root, acacia rigidula, phenylethylamine hcl, theobromine anhydrous and quebrach bark.

Does Yellow Devils work?

We picked apart the official website and didn’t find any research proving Yellow Devils would help you lose weight. There are studies linking caffeine to boosting metabolism, but not directly linking to this product.

Take a moment to think about what Yellow Devils offers and switching it up with a supplement like Leptigen, which consists of a formula containing some clinically-tested ingredients and shown to work.

How much does Yellow Devils cost?

Yellow Devils cost $59.99 for 100 capsules.

How should I take Yellow Devils?

Take one Yellow Devils capsule per day. Each bottle lasts 100 days.

Can I take Yellow Devils if I have a health condition?

Those taking prescription medications of any kind, people with health conditions, anyone under 18 years of age or women who are pregnant or nursing should contact a healthcare professional prior to using any weight-loss supplement, including Yellow Devils.

What do users like about Yellow Devils?

Some users liked the increased energy while using Yellow Devils.

What do users NOT like about Yellow Devils?

Some users complained of the side effects while using Yellow Devils.

How do I contact the Yellow Devils customer service department?

You can contact the Yellow Devils customer service department by calling 1-877-628-6955, sending correspondence to American Generic Laboratories 2150 S 130 E Suite 500 Salt Lake City, UT 84106 or by sending messages though the feedback form.

How much caffeine is in Yellow Devils?

There’s 300mg of caffeine is one serving of Yellow Devils.

Does Yellow Devils come with a guarantee?

No, Yellow Devils don’t come with a guarantee, considering the supplement isn’t sold on an official website.

Do you know of any special deals or discounts on Yellow Devils?

We couldn’t find any deals or discounts on Yellow Devils. However, the last few months, our readers have been excited about losing weight and taking advantage of Leptigen’s Special Trial Offer, which is simply the cost of shipping and handling. Click here to try it out.

One User Review About Yellow Devils

Leave comments below
  • 1

    I have been taking them for 2 weeks now and I don’t have any side effects. Other than losing weight. As long as you don’t overdo work out s, you’re fine


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