Updated: 04/26/2016 - Website operated by Leptigen

Xtreme Trim RDS X Review - Does This Thermogenic Really Work? Are caffeine and lack of results deal breakers?

Editor's Review: 3.5 / 5.0
Xtreme Trim RDS X Review

Guess what I did with my weekend? Well, I overheard a friend talking about Extreme Trim RDS-X at work on Friday, so I had to do an in-depth review to alleviate my curiosity. It looked pretty interesting. I did a check on the ingredients, looked for the risks of side effects, and tried to find some clinical research. After that, I read up on as many customer reviews as I could find and looked into the company that makes it. Here’s the sum of my research.

EDITOR'S TIP: Combine Xtreme Trim RDS X with a proven fat burner such as Leptigen for better results.

What You Need to Know

To begin, Extreme Trim RDS-X is a thermogenic fat burner, which basically means that it increases the “heat” inside your body to promote fat loss. Heart rate, blood pressure, and metabolism are all influenced by the stimulants in thermogenic supplements. The list of ingredients is pretty lengthy, so here you go:

• Xtreme RDS-X Burn Blend: Caffeine, Green Tea Extract, Cayenne Pepper, Xanthinol Nicotinate, and Black Pepper Extract.
• Xtreme RDS-X Amped Blend: Soybean Oil, White Quebracho, Ginkgo Biloba Extract, Huperzine, and Phosphatidylserine.
• Xtreme RDS-X Melt Blend: White Willow, Soy Lecithin, Indian Elecampane Extract, Sesame Oil, Gotu Kola Extract, and Hoodia Gordonii.
• Xtreme RDS-X Activation Blend: Evodia Extract, Codonopsis Extract, Inositol Hexaphosphate, Yohimbe, and Cnidium Extract.

Although some ingredient amounts are listed specifically, each of these blends is proprietary, so we don’t know exactly how much of each ingredient is present (there wouldn’t be enough room on the label anyway!). One plus is that Xtreme Trim RDS-X is simple to take–no mixes or powders.

A company called Vitamin World makes Xtreme Trim RDS-X, and Vitamin World has been around since 1976. It’s currently based in Bohemia, New York. One bottle of the supplement should last you a month (take two pills, twice per day for optimal results), and each costs $52.99 online. We like the longevity of the company–it’s certainly easier to trust a company that has been around since 1976–and the pills seem easy to use. We also like the comprehensive nature of the ingredients list, but read on…

“Too Much Caffeine?”–Our First Concern

Our first concern when we looked at the label was the amount of caffeine. “There’s nothing unusual about finding caffeine in a supplement. In fact, it’s almost a necessity!” said our research editor. “However, the dosage found in Extreme Trim is excessive, and I would be surprised if side effects weren’t an issue.” Xtreme Trim RDS-X contains 195 mg of caffeine, well beyond the average amount in supplements.

Caffeine can stay in your system for as long as 14 hours, according to WebMD.com. That being said, you need to plan your two doses of Xtreme Trim very carefully during the day or you might have trouble sleeping at night. Furthermore, if you’re normally sensitive to caffeine or have blood pressure problems or heart irregularities, stay away from this high dosage of caffeine.

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

“Where Are All the Reviews?”–Another Issue

As you know, reviews usually play an important part in our research; but this time around, we were disappointed. Vitaminworld.com has zero reviews for Xtreme Trim RDS-X on its website, which isn’t a good sign. Some other regular review sources like the Better Business Bureau came up empy as well, and Amazon.com (although we don’t recommend buying supplements from someone other than the actual retailer if possible) had only seven total reviews.

It’s hard to get a good idea about whether or not a product will work for you if there aren’t many reviews. Normally, we’d say that the review-writing has to start somewhere–maybe even with you–but when a company has been around since 1976, this is a surprise.

In our experience, even minor setbacks or problems can doom the long-term efficacy of a supplement. In this case, the caffeine amounts are high, which may cause you some real discomfort. You may also have withdrawal symptoms when you stop taking Extreme Trim TDS-X.

Where Does Science Come into the Picture?

We took to the National Institutes of Health website to see if we could dig up valuable research and discovered an interesting study about green tea extract. In this study by the University of Birmingham, patients experienced better fat oxidation when taking green tea extract, but the dosage was around 890 mg–the amount of green tea extract in Xtreme Trim RDS-X is 59 mg. In short, that’s not enough to render it particularly useful.

What’s the Bottom Line?

We thought this supplement looked interesting at first, especially because of the long-standing history of Vitamin World. The supplement doesn’t hold its own though, and we couldn’t find a reason to suggest taking it over any number of other supplements. There’s simply too much caffeine and not enough of the oxidant green tea extract.

If you want to burn fat, try something that has more clinical research to its name and doesn’t rely quite so heavily on caffeine.

Lately, we’ve been recommending a product called Leptigen–it burns fat, boosts metabolism, and has 4 powerful, clinically-researched ingredients in the proprietary blend. The customer reviews are positive online, and we can’t find any word of harmful side effects.

There’s a special limited-time trial offer going on right now, so it wouldn’t hurt to give it a try.

Learn More About Leptigen »
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How Does Xtreme Trim RDS X Compare?

Previous Xtreme Trim RDS X Review (Updated June 29, 2010):

What You Should Know

Click Here To See Our Highest Rated Review

Xtreme Trim RDS-X is a thermogenic supplement manufactured and sold by Vitamin World. The ingredient list is available on the official website via a product label. Thermogenic supplements often contain large amounts of caffeine to stimulant heart rate, which is the case for Xtreme Trim RDS-X. High levels of caffeine can inhibit sleep patterns for 12 hours so taking the supplement in the afternoon can cause the dieter to feel tired, even after sleeping through the night. The ingredient list is long and packed with proprietary blends that hide the true amounts of some crucial ingredients.

List of Ingredients

Xtreme RDS-X Burn Blend: Caffeine, Green Tea Extract, Cayenne Pepper, Xanthinol Nicotinate, Black Pepper Extract.

Xtreme RDS-X Amped Blend: Soybean Oil, White Quebracho, Ginkgo Biloba Extract, Huperzine, Phosphatidyserine.

Xtreme RDS-X Melt Blend: White Willow, Soy Lecithin, Indian Elecampane Extract, Sesame Oil, Gotu Kola Extract, Hoodia Gordonii.

Xtreme RDS-X Activation Blend: Evodia Extract, Codonopsis Extract, Inositol Hexaphosphate, Yohimbine, Cnidium Extract.

Product Features

It is highly unlikely that the average dieter has any idea how most of the ingredients in Xtreme Trim RDS-X work in the body. The burn blend is simple. Caffeine boosts heart rate and metabolism, but there is 195 mg of caffeine in the supplement. Caffeine has a 12-hour life in humans. This means it takes 12 hours for the body to process the caffeine and heart rate to slow down. If the dieter takes the supplement in the afternoon, it will affect sleep patterns.

Green tea extract is a fantastic antioxidant with strong clinical support for weight loss. Unfortunately, there is not enough green tea to boost metabolism. The average clinical study includes 300 to 350 mg of green tea. This supplement contains 59 mg per serving.

Vitamin World tries to thrown in a couple of well-known ingredients to support weight loss claims. Hoodia gordonii, for instance, is listed with the Melt Blend. Hoodia does not melt anything, let alone fat or calories. It is supposed to control hunger, but clinical research proves otherwise.

While willow bark is a natural pain reliever, but that has nothing to do with weight loss. Years ago when Ephedra was legal, white willow bark was included as part of an herbal ECA stack. ECA, or ephedra, caffeine and aspirin, is a proven combination of weight loss ingredients, but ephedra is illegal for use as a weight loss ingredient in the United States and some other countries.

See Our Featured


  • Ingredients are listed online.
  • Caffeine and green tea are proven to boost weight loss.


  • Not enough green tea.
  • Too much caffeine.


Xtreme Trim RDS-X is not a safe weight loss product. The company packs 195 mg of caffeine with other ingredients to force an increase in metabolism. Potential side effects include racing heart and increased blood pressure.

Xtreme Trim RDS X FAQ:

We sorted through and condensed hundreds of user comments about Xtreme Trim RDS X to craft this helpful FAQ.

What are the side effects of Xtreme Trim RDS X?

Xtreme Trim RDS X side effects, mentioned in customer reviews, may include insomnia, jitters, and upset stomach.

What are the ingredients in Xtreme Trim RDS X?

Xtreme Trim RDS X ingredients include caffeine, green tea, cayenne pepper, xanthinol nicotinate, black pepper, soybean oil, white quebracho, ginkgo biloba, huperzine, phosphatidylserine, white willow, soy lecithin, Indian elecampane, sesame oil, gotu kola, hoodia gordonii, evodia, codonopsis, inositol hexaphosphate, yohimbe and cnidium.

Does Xtreme Trim RDS X work?

Throughout the official Xtreme Trim RDS X website, we found details about the supplement, but there were no studies supporting the weight-loss claims. We did locate solid science backing ingredients like green tea and black pepper extract, but the finding didn’t relate to this formula.

Considering Xtreme Trim RDS X contains some natural ingredients, you may want to boost your weight-loss by combining with a supplement like Leptigen, which consists of some clinically-tested ingredients and has been shown to work.

How much does Xtreme Trim RDS X cost?

Xtreme Trim RDS X costs $36.99 for 120 capsules.

How should I take Xtreme Trim RDS X?

Take two Xtreme Trim RDS X capsules, twice a day. One bottle lasts 60 days.

Can I take Xtreme Trim RDS X if I have a health condition?

Women who are pregnant or nursing, those with health conditions, anyone taking prescription medications or people under 18 years of age should contact a healthcare provider prior to using any weight-loss supplement, including Xtreme Trim RDS X.

What do users like about Xtreme Trim RDS X?

Some users reported liking the increased energy while using Xtreme Trim RDS X.

What do users NOT like about Xtreme Trim RDS X?

Many users complained of side effects, ineffectiveness, and about the price of Xtreme Trim RDS X.

How do I contact the Xtreme Trim RDS X customer service department?

You can contact Xtreme Trim RDS X customer service department by calling 1-866-667-8977, emailing Info@vitaminworld.com or sending letters to VitaminWorld.com 105 Orville Dr. Bohemia, NY 11716-2599.

If I take more Xtreme Trim RDS X than recommended, will I lose more weight?

No, if you take more Xtreme Trim RDS X than recommended, you won’t lose more weight. The company suggests not exceeding six per day.

Does Xtreme Trim RDS X come with a guarantee?

Xtreme Trim RDS X comes with a  90-day guarantee.

Do you know of any special deals or discounts on Xtreme Trim RDS X?

There are deals and discounts on Xtreme Trim RDS X. If you purchase from the official website, you’ll receive a percentage off the sale price. However, our readers have been wanting to save money and lose weight, so they’re taking advantage of Leptigen’s Special Trial Offer, which is simply the cost of shipping and handling. Click here to give it a go.

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