Updated: 01/18/2018

The results of our research into Stimerex ES were somewhat surprising. Our in-depth reviews scrutinized the ingredients, side effects, level of customer service and scientific studies. Additionally, we analyzed hundreds of user comments and dieter feedback. Then, we summarized and condensed to give you the info you need.

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

What is Stimerex ES?

First off, Stimerex ES is a fat burner. The ingredients are ephedra extract, caffeine, acacia rigidula extract, theobroma cocoa extract, phenylethylamine hcl, citrus aurantium extract, green tea extract, yohimbe extract, 6,7 dihydroxybergamottin, naringen and 1,3-dimethylamine hcl. Supposedly, it helps with weight-loss and fat loss. You’ll need to take 1-3 tablets per day. [1]

Stimerex ES has been available since 2011 from Hi-Tech Pharmaceuticals. Trusted retailers and the official website sell the supplement. We like that it contains a few natural ingredients and that we found some favorable customer comments, but read on…

Products Similar to Stimerex ES

Lipo 6 RXread
Redline Ultra Hardcoreread
Burn HD (Sample offer)read

Ingredients – “Are They Safe?”

Our first concern relates to Stimirex ES ingredients. “The formula contains ephedra; which is banned from being used in dietary supplements in the United States,” said our Research Editor. “It has been linked to adverse reactions.” [2]

“Nausea, increased perspiration and frequent visits to the toilet,” said a customer.

One customer stated, “Makes my heart pound like crazy and my head hurt.” [3]

Stimerex ES ingredients weren’t an issue with every customer.

“I do not take it daily, because I feel it is very strong,” commented a dieter.

Stimerex ES Customer Testimonials

Side Effects – “Stimerex ES Negative or Positive?”

Some customers have complained about Stimerex ES side effects. One person mentioned, “Do not buy this. My husband has been on it for just 2 weeks and he is acting angry.” [4]

“Sometimes makes me nervous,” said another user.

We read Stimerex ES reviews that didn’t mention side effects.

The first 2 days of application of the supplement I found myself jittery. The head-rush/burst of energy was outstanding. Hard to get used to at first, but was slowly mitigated,” said a dieter. [5]

“Had a headache the first few days and then it went away,” stated a customer.

The research we’ve done has shown if there is some particular aspect of a diet pill or weight-loss program that is especially concerning, the likelihood of real success for the long-term is slim. This means if Stimerex ES does in fact cause issues in a lot of people, this could be a major problem.

The Science – “Is There Any?”

From what we could gather, there is no clinical research presented on the company website to support the weight-loss claims regarding Stimerex ES. While this product does contain some serious stimulants to potentially boost thermogenesis, it may cause some adverse effects as well. At DietSpotlight, we prefer to see some solid evidence for support.

What Users Are Saying

“”First week 3 pounds lost so far. Great energy. I feel wired. Great appetite suppressant. I have to force myself to eat.””

“”Gives me more energy, but I don’t think it helped with weight loss. Be careful not to take it in the morning on an empty stomach or before you go to bed…did give me a boost though!””

“”Causes nausea and jitters without any energy. Nausea did last several hours.””

Also: read our Burn HD Weight-Loss Kit review »Stimerex ES Ingredients

The Bottom Line – Does Stimerex ES Work?

So, should you buy Stimerex ES? Well, first of all, we appreciate that this supplement contains some beneficial ingredients such as green tea and there is a 60-day return policy posted on the website. On the other hand, we have some doubts about it because it’s not backed by actual clinical studies. Also, we noticed that the return policy does not work if you opened the bottle. Not to mention, it clearly contains some potentially dangerous ingredients, which can lead to serious side effects. [6]

If you’d like to drop more weight, then we suggest you choose a product that contains safe ingredients, is backed by solid science and does not lead to harsh adverse effects.

Among the best products we’ve seen this year is one called Burn HD. Its formula is a potent blend of four ingredients, which have been proven in documented clinical research to help boost metabolism and increase fat loss. You should also be aware that we can’t find any complaints of harsh side effects and the user comments online reveal people are seeing great results.

The makers of Burn HD are so excited about their product they’re offering a 2-Week Sample, which is very reassuring.

Learn More About Burn HD »
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Stimerex ES

What are the side effects of Stimerex ?

Stimerex ES side effects reported by customers may include headaches, nausea, upset stomach, anxiety, sleeplessness and jitteriness.

What are the ingredients in Stimerex ES?

Stimerex ES ingredients include ephedra extract, acacia rigidula, phenylethylamine, methylsynephrine, b-phenylethylamine, n-methyl-b-phenylethylamine, r-beta-methylphenylethylamine, theobroma, phenylethylamine hcl, citrus aurantium, green tea, yohimbe, naringen, 6.7 dihydroxybergamottin, mucuna pruriens, dmae, l-tyrosine, l-phenylalanine and caffeine. 

How do I know if Stimerex ES 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 Stimerex ES work?

Stimerex ES states that one of the ingredients was involved in a double-blind study, but there’s no links to the research. We’ve found solid science on caffeine and green tea, but the information doesn’t point toward this supplement.

How much does Stimerex cost?

Stimerex ES costs $14.95 for a 20-count bottle or $69.95 for 90 capsules.

How should I take Stimerex ES?

You should take one or two Stimerex ES capsules, twice per day. The company suggests not taking more than four in a 24-hour period. When used as directed, each container lasts between six and 45 days.

Is there any mention of acacia rigidula in Stimerex?

Yes, there is mention of acacia rigidula in Stimerex ES. In April of 2015, the FDA addressed the ingredient and asked Hi-Tech Pharmaceuticals to change the label. 

Is the ephedra extract in Stimerex ES the same as ephedrine?

No, the ephedra extract in Stimerex ES isn’t the same as ephedrine. The prior is an herb extracted from the plant.

How much caffeine is in Stimerex ES?

Each serving of Stimerex ES contains 150mg of caffeine.

Does Stimerex ES come with a guarantee?

Stimerex ES doesn’t come with a guarantee. You can contact the customer service department for details about the return policy.

Stimerex ES Ingredients

Stimirex ES is a fat burner that claims to contain 25mg of ephedra. The popular variety has been banned from use in diet products, but there are other extracts from the same plant that are legal. These do not work to increase metabolism or decrease hunger.

Stimerex ES Ingredients and Supplement Facts

Serving Size: 1 Tablet
Serving Per Container: 90
Amount per Serving% DV
Proprietary Blend with Thermo-RX and Extend-RX Technologies510mg*
- Ephedra Extract25mg*
- Acacia Rigidula Extract125mg Phenylethylamine Alkaloids*
- Theobroma Cocoa Extract**
- Phenylethylamine HCL**
- Citrus Aurantium (Synephrine)25mg*
- Green Tea Extract**
- 1,3 Dimethylamylamine HCL**
- Yohimbe Extract**
- Naringen**
- 6,7 Dihydroxybergamottin**

Other Ingredients: None


Previous Stimerex ES Review (Updated April 17, 2012):

Stimerex ES: What You Should Know

Many people look for a product that can help them burn fat and lose weight, and there are many products that promise this very thing. With so many options in weight loss products, it can be overwhelming to find the right product. How does Stimerex ES measure up against other fat burning products?

List of Ingredients in Stimerex ES

Acacia Rigidula Extract (leaves), [Yielding Phenylethylamine Alkaloids: methylsynephrine, B-Phenylethylamine, N-Methyl-B-Phenylethylamine, And R-Beta-Methylphenylethylanine Theobroma Cocoa Extract (Seed), Phenylethylamine HCL, Citrus Aurantium Extract (25mg Synephrine), Green Tea Extract (leaves), Yohimbe Extract (bark), Naringen (fruit), 6.7 Dihydroxybergamottin (fruit), Mucuna Pruriens Extract (20% Dopa), DMAE Bitartrate, L-Tyrosine Ethylester, L-Phenylalanine Ethylester, Caffeine (anhydrous) 150 mg , Microcrystalline Cellulose Dextrose, Sodium Starch Glucolate, Magnesium Stearate, Stearic Acid, FD&C Blue # 1, FD&C Red # 40

Product Features

Stimerex ES is a weight loss aid that has four different ways of helping the user lose the desired amount of weight. First, Stimerex ES burns fat. Second, it suppresses your appetite so that you eat less. Third, it boosts metabolism, and lastly, it is a diuretic and sheds excess water. The product claims to get rid of “stubborn fat” that is difficult for many people to lose. Users take one pill three times a day, usually with meals.

Stimerex ES used to be known for having ephedra as the active ingredient. It no longer contains ephedra. Rather, Stimerex ES uses caffeine to accomplish the fat burning effect. A common ingredient that is also in Stimerex ES is hoodia, an ingredient that is supposed to suppress one’s appetite. One problem with the use of hoodia is that hoodia has not yet been proven to actually suppress your appetite. The company claims that Stimerex ES was made after many scientific studies, but the website does not list these studies to back up the claim. In fact, the company’s website is mostly an outlet for promotion and sales, with very little information about the product itself.

Stimerex ES costs $39.95 for one bottle, if you purchase from the company. Other sellers have it for a few dollars less. Unfortunately, the company never mentions how long the bottle lasts. The product is a thermogenic fat burner, but some side effects have been reported. .

Stimerex ES Advantages

  • Thermogenic fat burner that does not contain ephedra.
  • Boosts energy.

Stimerex ES Disadvantages

  • Side effects may cause problems for some.
  • The price is rather high, especially if the company is not clear on how long the supply will last.
  • Scientific research is claimed to have been conducted, but the studies are not published.
  • Website is not informative; rather, it is an outlet for promoting and selling the product.


Stimerex ES is just one of many thermogenic fat burners available. The less than informative website and the high price could turn customers away from this product. Though it does increase energy, Stimerex ES fails to stand out among fat burning supplements.

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.

8 Stimerex ES Reviews

  • Emily

    Me and my sister have been taking this product for a year now it’s incredible the weightloss you can achive taking this product. Weve both lost 3 pounds in a matter of five days. Ive avoided the side affects because i eat breakfast followed by a glass a water and then consume it, no headaches or nausea! Drinking 8 cups of water a day and staying hydrated is key in using this product.

  • Yvonna

    I have tried both products mention here stimerex es does work to suppress my appetite, boost energy level. I haven’t lost weight the way I expected. I have use it for a while and I am consider purchasing again or another product that will assist me with losing weight.

    • Maribel (Editor)

      Hi Yvona, sorry that Stimerex didn’t work as you expected. Another product that can assist you with losing weight is Dietspotlight Burn, it can help boost you metabolism and increase fat loss. Hope it goes well!

  • Is it metabolized in the liver?

    did you ever find out if stimerex is metabolized in the liver?

  • michelle

    is stimerex es excreted through kidneys or liver? Thank you 🙂

  •  Exercise more and eat better
    Stormie (Verified User)

    I personally have used… and still use Stimerex-ES.. Isn’t “Ephedra Extract” Leaves… Essentially.. Ephedra? In different form of course?? Also.. I like the energy I get from the stimerex but honestly the crash afterwards… kinda sucks. The effects don’t seem to last more than a couple hours and after all the cleaning I manage to get done at work… I feel like I need to eat! So to me the whole thing is kind of a gimmick.. Maybe we should look at excercise more eat better/less approach to dieting! There IS NO miracle pill that will make you look like a super model even if you starve! Hard work means great results! 😉

  • Tanya

    I used Stimerex ES, my side affect, I had insomnia and was weak when i took it.

    • Maribel (Editor)

      Tanya, other users have mentioned the product making them feel anxious and sleepy. Best to try another product that won’t give you these side-effects. Have you heard of Dietspotlight Burn? It delivers weight-loss results at a great value.