Updated: 05/17/2016 - Website operated by Leptigen

GNC Diet Pills Review - Do These Supplements Work? Are lack of reviews and too many options deal breakers?

Editor's Review: 3.5 / 5.0
GNC Diet Pills Review

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.

EDITOR'S TIP: Substitute GNC Diet Pills with a proven fat burner such as Leptigen for better results.

What You Need to Know

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 supplements. 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.

Scroll below for one of the best products we’ve seen over the last year.

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 – “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 in 2016 is one called Leptigen. 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 Leptigen are so confident in the formula that they’re offering a Special Trial Offer.

Learn More About Leptigen »
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How Does GNC Diet Pills Compare?

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

What You Should Know

Click Here To See Our Highest Rated Review

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.


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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.

See Our Featured


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


  • 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 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 diet pills?

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.

You may want to consider replacing GNC diet pills with a supplement like Leptigen, which contains ingredients supported by some amazing dieter reviews.

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 diet pills?

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.

Can I take GNC diet pills if I have a health condition?

Women who are pregnant or nursing, those with health conditions of any kind, people taking prescription medications or under 18 years of age should consult with a healthcare provider prior to using dietary supplements of any kind, including GNC diet pills.

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 diet pills?

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

How do I contact the GNC diet pills customer service department?

You can contact the GNC diet pills customer service department by using the customer feedback form on the official website, calling a representative at 1-877-462-4700 or mailing correspondence to the corporate headquarters at General Nutrition Corporation 300 6the Ave. Pittsburgh, PA 15222.

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 diet pills. 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. When you visit the official website, you will notice buy one, get one free offers, promotions on individual supplements and free shipping when you purchase a particular amount. You can also sign up for a Gold Card to receive additional discounts. However, the last several months have flown by, considering our readers have been taking advantage of Leptigen’s Special Trial Offer, which is merely the cost of shipping and handling. Click here to try it out.

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