Updated: 07/11/2017 - Site sponsored by Dietspotlight Burn
By Summer Banks Jul 08, 2017

I need to make a confession: I was obsessed with researching GNC diet pills.  This company is one of the leading online and offline vitamin shops today, but we want to know more about a specific part of the business – GNC diet pills. We looked at ingredients, side effects, customer service and clinical support. Reviews from hundreds of buyers were read. We then condensed and refined to give you what you need.

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

What are GNC Diet Pills?

First off, GNC diet pills are a collection of supplements available from the vitamin store. Ingredients vary depending on the brand, but many contain caffeine. Directions are also different from one product to the next. Some containers are small and portable, but others are a little too large to take on the go.

The products, released at various times since GNC opened in 1990, are both natural and synthetic. Purchases of GNC diet pills are available via online and offline stores. We like that all ingredients are listed on the official website and that the company has a strong BBB rating, but read on…

Lack of Reviews – “No Insider Info?”

The first issue that concerns us about GNC diet pills is the lack of reviews for some products. “You want to know what other dieters are feeling about a supplement,” suggests our Research Editor. “If there are no comments and experiences to go on, how is the customer supposed to learn more before buying?”

According to a study published by an author from the Georgia Institute of Technology, “Our findings support the notion that when faced with an overload of information in the form of numerous reviews from numerous reviewers, community members process information [interactively], using source characteristics as a convenient and efficient [hands-on method on] which to base their product purchase decisions.”

We also found that length is another important factor, according to an author at the Fox School of Business, “review depth has a positive effect on the helpfulness of the review.”

We feel it is important to note that many GNC diet pills do have reviews; some long and others short. It is hit or miss most of the time.

Too Many Options to Choose From – “A Problem”

Another problem with GNC diet pills is that there are far too many options to choose from. We found more than 100 choices in thermogenics alone, some with solid ingredients and others with formulas that may cause side effects.

It’s also an issue if dieters take GNC diet pill ingredients into consideration. There are 24 in the first four products all from the GNC. When we reviewed other ones we found 20 in some individual supplements. That can be a bit overpowering for many customers.

The Science – “Are GNC Diet Pills Clinically-Proven?”

GNC diet pills are not backed by science in all cases. There are no links to clinical research on the official website. You would have to visit the product page from the company to find such information. You could also look up each ingredient to find support. At DietSpotlight, we believe it is important to give dieters detailed information that a supplement is scientifically proven. If that’s not available, that’s when we throw the red flag.

The Bottom Line – Do GNC Diet Pills Work?

So, are we searching the online store for our next purchase? Our look into GNC diet pills was an interesting time. We like that the business has a strong BBB rating and it has been around for decades, but we have reservations recommending a supplement company that doesn’t offer clinical support for the products. We’re also concerned that the selection could be a bit overpowering for some dieters.

If you’re looking to shed those extra pounds, we suggest going with a supplement from a company that offers clinical evidence that the formula is proven to help with weight-loss. One that’s simple to understand.

Among the best products we’ve seen this year is one called Dietspotlight Burn. The company lists four ingredients in a proprietary blend that’s shown in published clinical research to help spark metabolism and ignite fat loss. With this supplement you don’t have to worry about negative side effects. Dieters are happy with the good results they’re seeing, according to reviews.

Also, we are encouraged by the fact that the makers of Dietspotlight Burn are so confident in the formula that they’re offering a Special Trial Offer.

Previous GNC Diet Pills Review (Updated January 1, 1970):

What You Should Know about GNC Diet Pills

Many women and men have a difficult time losing weight. After all, it is certainly easier to add a few pounds, than it is to shed a few pounds. One thing is for certain, weight loss requires serious action and dedication. This means watching what you eat, exercising regularly, and possibly adding a weight loss supplement to the mix. Now, choosing the right weight loss product or diet pill requires a little time and research. After all, there are many options at your disposal. You may be familiar with GNC Diet Pills. GNC is a leading retail store that offers a wide variety of supplements for weight loss, muscle building, bone health, joint care, and overall wellness. The only other company with as extensive a product list as GNC is Nutrisystem.

GNC Diet Pills Ingredients:

    Not applicable.

Product Features

GNC Diet Pills vary from caffeine-based supplements, to internal cleansing aids, to fitness formulas that assist with improving muscle tone. This is why it is important to have a good idea of what your weight loss goals are. If, for example, you'd like to build muscle GNC would have you go with GNC Pro Performance AMP Ripped Vitapak. Once you establish your goals, you are better able to choose a supplement formula that suits your needs. It is important to avoid GNC Diet Pills and other supplements that contain ingredients you have allergies to.

Be sure to check out the key ingredients used in GNC Diet Pills. These should be posted on the package label. You may notice that some GNC Diet Pills contain several forms of caffeine. Different forms of caffeine include Guarana Seed Extract, Caffeine Anhydrous, Green Tea Extract, Yerba Mate, Black Tea, and Cocoa Extract like those in GNC Total Lean CLA. The problem is that too much caffeine can lead to side effects like dizziness, nausea, headaches, rapid heartbeat, sleeplessness, and nervousness. The key ingredients used in diet pills and weight loss supplements tell you a lot about how the product actually aids with weight reduction, or does not.

Advantages of GNC Diet Pills

  • GNC Diet Pills are readily available in common GNC stores.
  • GNC is a company that has been around for many years now.

Disadvantages of GNC Diet Pills

  • There are many alternatives to GNC Diet Pills.
  • Many weight loss products offered through GNC are expensive.
  • Some of these diet pills are loaded with caffeine and other stimulants.
  • Not all GNC products are regulated by the FDA (GNC Burn 60 for one).


Just because a weight loss product has a big name does not mean it will be effective. Therefore you should not presume that GNC Diet Pills are better than alternatives. Though not as pricey as Diet Center, GNC pills can be a bit steep in price. It is imperative to consider all important factors like key ingredients, whether or not clinical research is provided, customer reviews, and satisfaction guarantees. This will help you find the right weight loss supplement to suit your individual needs and goals. There are weight loss products available with proven ingredients that are not GNC Diet Pills.

GNC Diet Pills is more of a product line or group of supplements than one, individual formula. There are some common ingredients found across several of those offered, however.

GNC Diet Pills Ingredients and Supplement Facts

Serving Size: Varies
Serving Per Container: Varies
Amount per Serving% DV
Garcinia Cambogia**
Green Coffee Bean Extract**

Other Ingredients:

We reviewed GNC Diet Pills ingredients in order to give you the bottom line on these supplements.

Garcinia Cambogia

Garcinia cambogia is a tropical fruit that is grown naturally in Indonesia and Southeast Asia. It has become a popular ingredient in weight-loss supplements, primarily because it contains a chemical called hydroxycitric acid.

What Is It Supposed To Do?

Hydroxycitric acid is a chemical found in garcinia cambogia. It is responsible for many of the health benefits the fruit has, including the treatment of obesity, low metabolic rates, poor athletic performance, joint pain, and constipation.

Clinical Research

According to the Journal of the American Medical Association, “Garcinia cambogia failed to produce significant weight loss and fat mass loss beyond that observed with placebo.”


Coleus forskolin is a plant that has been cultivated since ancient times for traditional medicine. It is naturally grown in Thailand, Nepal, and India.

What Is It Supposed To Do?

When found as an ingredient in dietary supplements, coleus forskolin can be used to treat asthma, obesity, and eye diseases.

Clinical Research

When studying the effects of coleus forskolin, researchers concluded, “The results indicate that forskolin is a possible therapeutic agent for the management and treatment of obesity.” This study was published in Obesity Research.

Green Coffee Bean

Green coffee beans are ones that have not been roasted yet. They have become a popular ingredient in weight-loss pills after it was featured on Dr. Oz’s TV show.

What Is It Supposed To Do?

Green coffee bean is consumed to treat obesity, high blood pressure, diabetes, memory problems, and infections.

Clinical Research

According to a study published in Complementary and Alternative Medicine, “These results suggest that GCBE [green coffee bean extract] is possibly effective against weight gain and fat accumulation by inhibition of fat absorption and activation of fat metabolism in the liver.”

One that’s caught our attention is Dietspotlight Burn. The clinically-tested ingredients have been shown to work and are supported by positive customer feedback. Want to learn more? Click above.

  • References
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GNC Diet Pills Side Effects:

Side effects in those who take GNC Diet Pills are rare; however some have been reported by customers. While these do not stand for the majority there is always a chance when taking any dietary supplement.


“I cannot handle 2 pills! I tried, twice, and vomited, both times (2 separate days).”    Brandel


“Started to get heart burn from this pry cause of the cinnamon. I have acid reflux.”    Melissa


“I like cinnamon but something about it on the supplement is just gross and over baring to me and often upset my stomach.”    LaShae


“This gave me energy but also made me quite nauseous. I threw up once while taking it and couldn’t tell if it was me getting sick or the supplement making me sick. So I tried again with taking it, and within a few days I threw up again while taking it.”    Trent


“Has some side effects (got dizzy sometimes).”    Luis


“This product made me feel nauseous, and it didn’t let me sleep.”    Melissa


“It works to burn fat but it made me have terrible intense sugar cravings after. I would want an entire plate of cookies after not taking for a day. Also, it kept me awake at night, continuously.”    Anna


“These pills actually made me throw up on day 14.”    Tina


“The only con it does have it make you very hot. I know that is what it is supposed to do but it made me really hot.”    Jessica


“I did get a little rapid heartbeat the first 2 days, but went away.”    Leeza


We are all about decreasing the chance of side effects with dietary supplements, and have noticed that GNC Diet Pill reviews are great with very few complaints.

  • References
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GNC Diet Pills Questions & Answers:

We condensed hundreds of user comments about GNC diet pills into this helpful FAQ.

What are the side effects of GNC diet pills?

The reviews we read reported GNC diet pills side effects that include upset stomach, jitteriness, dizziness, lightheadedness, nausea, vomiting, irritability, anxiety, nervousness and diarrhea.

What are the ingredients in GNC?

GNC diet pills ingredients depend on the supplement. Formulas may contain caffeine, green tea, garcinia cambogia, acai berry, chromium, vitamins and minerals.

Does GNC diet pills work?

There’s no scientific research proving that GNC diet pills will help users lose weight. Taking a look at several of the active ingredients, like green tea and caffeine, we noticed some solid science, but not linked to these supplements. Some of the products contain “fad” ingredients, like acai and garcinia cambogia, which aren’t supported by science.

How much does GNC diet pills cost?

GNC diet pills cost vary. At the high end, the supplements run $79.99 and at the lower end $11.99.

How should I take GNC?

You should take GNC diet pills according to the directions on the label. Typically, you will consume a serving one to two times per day.


What do users like about GNC diet pills?

We found that users liked the convenience of buying GNC diet pills on the official website and that some contained natural ingredients.

What do users NOT like about GNC?

Some users didn’t like the high cost of GNC diet pills and the side effects of some of the supplements.



How can I shop for GNC diet pills?

You can shop for GNC diet pills by ingredients, dietary needs and brands.

Do I need to exercise with GNC diet pills?

No, you don’t need to exercise with GNC diet pills. You may notice improved results if you add fitness to your weight-loss program.

Does GNC diet pills come with a guarantee?

There’s a guarantee with GNC. You can return the supplements within 30 days to receive a full refund of the purchase price, minus shipping and handling.

Do you know of any special deals or discounts on GNC diet pills?

There are several special deals and discounts on GNC diet pills. Furthermore, we’ve noticed our readers have been going crazy over the past few months taking advantage of Dietspotlight Burn’s Special Trial Offer. Click above to learn more.

  • References
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GNC Diet Pills Scientific Abstracts:

Garcinia Cambogia

Upon reviewing the meta-analysis, it was discovered that a minor, statistically meaningful difference in weight-loss favoring the hydroxycitric acid within the Garcinia Cambogia fruit over placebo (mean difference: −0.88 kg; 95% confidence interval: −1.75, −0.00). Adverse effects of the gastrointestinal tract were doubled within the hydroxycitric acid group in comparison to the placebo. It was concluded that the randomized clinical trials indicated that Garcinia extracts could very well trigger short-term weight-loss. The effects were minor, and the clinical importance of such effects is uncertain. Future, stricter studies with higher quality reports are needed. [1]


There were no substantial alterations noticed with caloric intake or in macronutrient intake. Coleus Forskohlii had a tendency to mitigate gains within scanned mass (-0.2 ± 1.3, 1.7 ± 2.9 kg, placebo = 0.08) and body mass (-0.7 ± 1.8, 1.0 ± 2.5 kg, placebo = 0.10) showing no such substantial differences in fat-free mass (-0.1 ± 1.3, 0.6 ± 1.2 kg, placebo = 0.21), fat mass or body fat (-0.2 ± 1.0, 0.4 ± 1.4%, placebo = 0.40). Participation in the Coleus Forskohlii group experienced less hunger (p = 0.02), fatigue (p = 0.07), and fullness (p = 0.04). There was no clinically important interaction noticed between metabolic markers, muscle and liver enzymes, electrolytes, blood lipids, hormones, heart rate, blood pressure, or reports of adverse side effects. The results indicate that Coleus Forskohlii did not seem to encourage weight-loss, however, may assist in mitigating weight gain within obese females with seemingly no adverse reactions. [2]

Green Coffee Bean Extract

There was a great difference in body weight compared to placebo, upon reviewing meta-analysis (mean difference: −2.47 kg; 95%confiedence interval: −4.23, −0.72). The strength of these findings was moderate, and there is substantial heterogeneity within the studies. It was then concluded that the outcomes from the trials are encouraging, but the studies are of poor quality. Better studies are needed to come to a conclusion on the full effects of green coffee bean extract as an avenue for weight-loss. [3]


Those who consumed high amounts of caffeine experienced weight-loss, fat mass loss, and waist circumference reduction more so than those who consumed low amounts of caffeine. Resting energy expenditure was decreased less, and respiratory quotient was decreased more throughout the period of weight-loss (p < 0.01). In the group who ingested low amounts of caffeine, during weight maintenance, the green tea still decreased body weight, respiratory quotient, body fat, and waist circumference. Resting energy expenditure was elevated in comparison to the restoration of these variables with placebo (placebo < 0.01). It was concluded that high caffeine intake was linked to weight-loss via thermogenesis and fat oxidation. In those who consumed small amounts of caffeine, green tea and caffeine combination enhanced weight maintenance, only partially due to thermogenesis and fat oxidation. [4]

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.

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Leave a comment or review

Your Nametam

Can I go into any gnc an get this product.


Hi! For more information on where to purchase this product, please refer to the GNC official website and see if there is a store near you that holds this product.

  It works !
eat a healthy diet (Verified User)

I have been practicing this diet for 2 whole days now, and I’ve lost a little over a pound. I must admit the first 2 weeks are/will be tough because of the way your diet is limited, but by week 3 the rules relax a bit.