Updated: 01/12/2018

Phentremine Review - 6 Things You Need to Know


Why is it that so few diet products are backed by science? Let’s find out if Phentremine is one of the good ones. We did an in-depth review of ingredients, side effects, customer service and clinical research. Additionally, we examined hundreds of customer comments and reviews. Then, we summarized and condensed to give you the info you need.

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

What is Phentremine?

First off, Phentremine is a fat burner containing l-phenylalanine, synephrine, theobromine, caffeine, South African hoodia gordonii, senna, caffeine, evodiamine, alpha lipoic acid, white willow bark and yohimbe. After taking one capsule per day, the product supposedly helps you lose weight. One benefit is that you can throw them in your bag and go.

Phentremine has been around since 2006 and brought to the market by USP Pharma. It can be purchased through third-party retailers.  We like that we found some positive reviews and that it contains a few natural ingredients, but read on…

Products Similar to Phentremine

Yellow Scorpionread
Burn HD (Sample offer)read

Cost – “Yee-Ouch?”

The first concern with Phentremine ingredients was the high cost. “Some companies offer a trial offer, which is a good thing,” said our Research Editor. “But if there are hidden costs making it priced more than $100, this is a concern.”

“They charged me $80 extra, and I didn’t even finish the ‘free’ trial period,” said one disgruntled user.

“I’m not sure if these pills work or not, but the auto-subscription has me worried. Stay far, far away from Phentremine,” said another.

Phentremine Side Effects – “Concerning?”

Customers are reporting the intensity of Phentremine side effects. “I was going to try Phentremine, but the side effects made me second guess it,” said one customer.

“My sister recently started taking Phentremine, and the heart palpitations were a bit much for her,” said another.

Throughout our research, we’ve learned that any time there is a concern, like adverse reactions, the likelihood of long-term success is minimal. If Phentremine causes side effects, we raise the red flag.

Is There Any Science?

While some of the ingredients in Phentremine have been studied, there’s no direct link to the finding and the effectiveness of the supplement. Here at DietSpotlight, we think it’s important to have published data behind your claims. So, without proof, is it worth it?

What Users Are Saying

“”I have used for 2 days and see a complete difference in my appetite. No jitters. I have been drinking more water, and it helps. I eat small meals 4-6 times a day, and I can tell that I’m not hungry like I normally am.””

“”If I double up the dose, then I feel it working. I haven’t lost any weight and have been taking for 2 weeks.””

“”Made me hungrier. Even with exercise, I gained 5 pounds.””

The Bottom Line – Does Phentremine Work?

Are you ready for the final take on Phentremine? Well, the product is easy to purchase and we found some favorable customer comments, but the lack of scientific research leaves us a bit skeptical about this one. We also have concerns about the side effects and the high price tag.

If you’d like a product that will help you lose weight without the high price tag or lifetime of side effects, we suggest one that supports weight-loss with an ingredient list that is backed by published clinical studies.

Among the best products we’ve seen this year is one called Burn HD. The supplement contains some clinically-tested ingredients which have been shown to help boost metabolism and spark fat loss. Users have seen great results and there’s no reports of negative side effects.

Burn HD’s makers are so confident that you’ll love their product, that they’re currently offering a 2-Week Sample for new customers.

Learn More About Burn HD »
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What are the side effects of Phentremine?

Phentremine side effects, mentioned in dieter reviews, included upset stomach, nausea, irritability, anxiety, nervousness, sleeplessness and irregular bowel movements.

What are the ingredients in Phentremine?

Phentremine ingredients include l-phenylalanine, synephrine, theobromine, caffeine, South African hoodia gordonii, senna, caffeine, evodiamine, alpha lipoic acid, white willow bark and yohimbe.

How do I know if Phentremine is right for me?

Choosing the right product is the #1 question asked by DietSpotlight readers. We recommend trying any product before buying it and know that finding a product with a sample offer is near impossible - so we created our own product, Burn HD, with scientifically backed ingredients.

Click here to get your sample of our powerful fat burner today.

Does Phentremine work?

While there are studies showing caffeine boost metabolism, the research doesn’t link to Phentremine, not proves the supplement is effective. We did notice the product contain the “fad” ingredient hoodia, which isn’t supported by solid science.

If long-term weight-loss is your goal, take a moment and think about what Phentremine offers and then considering switching it out with a supplement like Dietspotlight Burn, which contains some clinically-tested ingredients and has been shown to accelerate metabolism and ignite fat loss.

How much does Phentremine cost?

Phentremine costs $48.95 for 30 capsules, $84.95 for 60, $112.95 for 90 and $134.95 for 150. If you sign up for recurring shipments, you’ll be charged the 30-count price.

How should I take Phentremine?

You should take one Phentremine capsule per day. One bottle lasts 30 days.


Can I use Phentremine late in the day?

The company recommends not using Phentremine after 4pm.

Will I need to diet and exercise while taking Phentremine?

No, you don’t need to diet or exercise while taking Phentremine, but eating balanced meals and adding fitness could improve results.

Does Phentremine come with a guarantee?

Phentremine doesn’t come with a guarantee.

Phentremine Ingredients

Phentremine Ingredients and Supplement Facts

Serving Size:
Serving Per Container:
Amount per Serving% DV

Other Ingredients: None

We dug deep into the Phentremine ingredients in order to provide the details you need.

Vitamin B-12

Also called cyanocobalamin, this is a vitamin that’s found in foods like fish, dairy and meat products. Vitamin B-12 plays an important role in the metabolism of proteins. Also, it helps the body produce red blood cells, which is crucial for overall health.

What is it Supposed to Do?

Firstly, there are many supplements and multivitamins that provide vitamin B-12. Typically when it’s used in diet products, it’s claimed to increase energy levels and help with weight-loss. However, there is really no evidence to support this.

Clinical Research

According to WebMD, “vitamin B12 is effective when it comes to treating conditions like pernicious anemia.” It is administered through injections or by mouth. However, there is no scientific research that suggests it will help with weight-loss.

Clinical testing is crucial when it comes to selecting the right diet product. Therefore you may want to check out a product like Dietspotlight Burn. This supplement actually contains clinically tested ingredients.

Chromium Picolinate

Chromium picolinate is often used as an alternative medicine. It’s essentially a supplemental form of chromium, the mineral, which is important for food digestion. You will find this ingredient in all sorts of diet products and supplements available in stores and online.

What is it Supposed to Do?

Well, it’s intended to aid with weight-loss and type 2 diabetes. This ingredient can help manage blood glucose levels by enhancing insulin activity. It may reduce appetite. Also, it assists the body with metabolizing carbohydrates.

Clinical Research

A number of clinical studies have been conducted with chromium. Many of these concern diabetes and/or weight-loss effects. In fact, according to AHC Media, one study reported that people experienced, “Increased fat-free body mass and decreased body fat after chromium supplementation.”

Hoodia Gordonii

There are many natural herbs used in over-the-counter diet pills. Hoodia gordonii, for instance, is one of them. It’s a cactus-like plant, and it grows in the Kalahari Desert of South Africa. The extract from this cactus is often found in weight-loss supplements available online.

What is it Supposed to Do?

Hoodia gordonii contains an active molecule called P57. This component is claimed to suppress appetite. It essentially works by tricking the brain into believing the stomach is full. This in turn aids with weight-loss.

Clinical Research

There have been some clinical trials done with hoodia gordonii extract. For instance, the National Institutes of Health conducted a weight-loss study. It showed that, “energy intakes and body weights did not differ significantly between the hoodia gordonii and placebo-treatment groups.” While this cactus extract did not help with weight reduction, it did not cause any side effects, either.

Is There Anything Out There That We Think TRULY Works?

We have noticed a supplement that shows real promise. Dietspotlight Burn, which is formulated with clinically tested ingredients, is a good option. All customers can take advantage of a Special Trial Offer, currently available. Click here to give it a try.

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Previous Phentremine Review (Updated January 1, 1970):

Phentremine: What You Should Know

As a dieter in this day and age, there is a lot to learn before simply acquiring the first weight loss pill, shake, or supplement you encounter. After all, you certainly want a product that assists you with fat reduction, but is harmless to your body as well. The good news is there are plenty to select from. One of these dietary supplements is Phentremine. It may be able to help some adults lose that extra five or fifteen pounds in a timely fashion.

Among the ingredients offered in Phentremine, you will find L-Phenylalanine (regulates the user’s blood sugar levels), Theorbromine (speeds up the metabolism and increases thermo genesis), Caffeine (boosts energy levels), and Synephrine (helps by suppressing hunger). Unfortunately there are no testimonials presented on the official website to support Phentremine as an effective diet supplement.

Phentremine: List of Ingredients

A Proprietary Blend of L-Phenylalanine, Theorbromine, Caffeine, Synephrine, and Copper Sulfate.

Phentremine: Product Features

Phentremine is a dietary supplement that is claimed to assist dieters with reaching their weight loss goals. Unlike some other formulas for fat reduction on the market today, this one appears to be primarily geared toward women. Not only does it aim to suppress hunger and burn off unwanted fat and calories, but it additionally works to heighten thermo genesis, boost energy levels, and increase the user’s metabolism. Phentremine does not require a prescription, and it is available online via an official website. A 30-day supply sells for $64.99. There are no returns accepted after 30 days of purchase, and there is no money-back guarantee for Phentremine, unless the bottle is unopened. Fortunately there is a helpful FAQ section provided on the primary website to assist dieters.


  • This diet drug may increase the user’s energy levels.
  • Phentremine may assist with mental awareness and focus.


  • There are several warnings posted online pertaining to Phentremine.
  • There is no satisfaction guarantee provided with this diet product.
  • The cost is pretty high at $65.
  • Some users may experience upset stomach, headache and dizziness.
  • No research is provided to support weight loss claims made about Phentremine.

Phentremine: Conclusion

It can be tricky locating the right diet product for real weight reduction. This is why it is imperative to do your research in the beginning. As far as Phentremine is concerned, there are not many reasons to choose this diet product. While it does endeavor to burn off fat and improve thermo genesis, there is really no data to support these claims. Furthermore, there is no money-back guarantee or refund option with Phentremine if you open it and try it. On the bright side, many other weight loss supplements out there today do come with a satisfaction guarantee.

Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

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