Diet products either work or they don’t. Period. Let’s find out which one Stacker 2 is. We looked at the ingredients, side effects, customer service and clinical research. Furthermore, we examined hundreds of user reviews and comments. Then, we summarized and condensed to give you the bottom line.
What is Stacker 2?
First off, Stacker 2 is a fat burner using the principles of the infamous ECA Stack. The ingredients are kola nut, yerba mate, cassia mimosoides, white willow bark, caffeine, green tea, guggulsterones and gymnema. You’ll take one to three per day after meals. The blister pack makes it easy to take with you on-the-go.
Stacker 2 was brought to the market more than 20 years ago by NVE Pharmaceuticals. It’s available in at local stores and through the official website. We like it contains a few natural ingredients and it appears to be affordable, but read on…
Side-Effects – “Look Out?”
The first concern was the intensity of Stacker 2 side effects. “This one contains multiple fat burners,” said our Research Editor. “While they’re supposed to boost metabolism, there’s a chance you could experience adverse reactions..
“I noticed it also made me jittery and sometimes gave me a headache,” said one user.
“Even after doing intensive workouts I still had too much energy. I had to stop taking them, because occasionally I had caffeine crashes. They are not fun at all,” offered another.
Side effects are rare, so we found some users that didn’t experience adverse reactions.
“No headache, jitters or anxiety like other caffeine pills,” commented a dieter.
Scroll below for one of the best products we’ve seen over the last year.
Results – “No Weight-Loss!”
Based on some Stacker 2 reviews, there’s were customers that didn’t notice results. “I did not experience any weight loss on this product. I did have more energy but I was looking for a fat burner,” said one customer online.
“The pill does give a great amount of energy, but the claim of it being a fat burner is bogus,” said a user.
Upon reading further reviews, some customers noticed results. “I tried them again and they helped me weight,” explained a customer.
“After the first one, I felt warm and could tell my metabolism was increasing,” stated another.
Our research has shown if there is some particular part of a diet supplement that’s troublesome, like not producing results, the likelihood of long-term success is slim. If Stacker 2 doesn’t help you lose weight or burn fat, is it really worth it?
The Science – “Legitimate?”
Some of the Stacker 2 ingredients have been clinically verified to work. The white willow bark extract, green tea extract and kola nut are common ones that have been shown to be mildly effective. However, the any results aren’t connected to this formula. We at DietSpotlight find clinical research to be important to the review process. When there’s no solid-science used to support the claims, we have concerns.
The Bottom Line – Does Stacker 2 Work?
Will Stacker 2 help you lose weight? Well, we like that it contains few natural ingredients and that we found some positive customer comments, but the lack of research showing it works is concerning. Also, reports of negative side effects and no real results leaves us a bit skeptical about giving it the thumbs up.
If you are still in the market for an effective fat burner, we suggest going with one that’s clinically proven to work, without any mentions of harmful side effects.
Among the best products we’ve seen in 2016 is one called Leptigen. It’s a blend of four fantastic ingredients proven to help boost metabolism and burn fat. Thankfully, it has been tested in scientific studies and verified by clinical research. Upon reading user reviews online, we haven’t found any side effects, but we did find plenty of reports of dieters seeing fantastic results.
The makers of Leptigen are even offering a Special Trial Offer – always a good sign, in our opinion.
Previous Stacker 2 Review (Updated March 19, 2014):
What You Should Know
Click Here To See Our Highest Rated Review
Stacker 2 derives its name from the term "stack" or "ECA stack". ECA is an acronym for ephedrine, caffeine and aspirin. When "stacked" or combined correctly it is said to be a fat burner and energy booster. Originally, this product contained ephedrine. The ephedrine has been substituted with a combination of ingredients, called a Proprietary Formula, that supposed to work similar to ephedrine. The official website of NVE Pharmaceuticals, the maker of the product, sells only the ephedrine free version. Be aware that Stacker 2 with the ephedrine formula is still being sold on online stores all over the web.
The official NVE Pharmaceuticals website is attractive if you like flash and sexy videos. The company manufactures and markets a variety of weight loss products and energy drinks. To obtain product information much beyond an ingredients list one has to go elsewhere. The product is inexpensive, less than $20 for a hundred tabs, and available at discounts and in a variety of quantities.
List of Ingredients
Kola Nut - The usual source of caffeine in stack formulas.
Yerba Mate - Rumored to help in weight loss, no quality evidence.
Cassia Mimosoides - As a lipase inhibitor it theoretically prevents the body from absorbing and storing fat.
White Willow Bark - The usual source of aspirin in stack formulas.
Caffeine Anhydrous - Mild thermogenic benefit and energy booster.
Green Tea - Proven fat burning and thermogenic benefits in sufficient quantities.
Guggulsterones - Stimulates thyroid and thereby may increase metabolism.
Gymnema - Historically used to treat diabetes. May inhibit taste for sweets.
Stacker 2 claims to be "The World's Strongest Fat Burner". The formula, called a "Proprietary Blend", is designed to increase your metabolism and therefore your body heat. Be it a proprietary blend or not, many of these ingredients are common in fat burners like Instant Knockout. This stimulates your brain and raises your heart rate. White willow bark is essentially aspirin and the caffeine completes the stack. In addition to weight loss, benefits claimed are a decrease in appetite and an increase in energy.
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- Ephedrine free.
- Contains ingredients proven to be helpful in weight loss.
- Claims to be free of side effects while containing ingredients commonly known for its side effects, such as caffeine.
- Does not break down the quantities for individual ingredients making it difficult to judge whether sufficient amounts are present to be effective.
- Without ephedrine, there is no evidence that the product will work like a traditional "stack" or "ECA stack" product.
- The importance of diet and exercised is not highlighted.
- No before and after photos or testimonials.
- No guarantee.
Stacker 2 has a few quality positive weight loss ingredients combined with ingredients that are not likely to do anything at all. It is assumed that the Proprietary Blend is greater than the sum of its parts. There is no evidence whatsoever to support that claim. When fad ingredients are involved, like in Batch 5, dieters often report ineffectiveness. It's impossible to measure the potency of the product or determine if there is enough of the ingredients to be effective. If you have had success with traditional "stack" products in the past, you will be disappointed with Stacker 2.
Stacker 2 Questions & Answers:
We summarized hundreds of user comments about Stacker2 into this helpful FAQ.
What are the side effects of Stacker2?
Some Stacker 2 side effects may include anxiety, nervousness, jitteriness, increased heartrate, irritability, sleeplessness, upset stomach, headaches and shortness of breath.
What are the ingredients in Stacker2?
Stacker 2 ingredients are yerba mate, caffeine, green tea leaves, guggulsterone, cassia mimosoides extract, white willow bark, gelatin, stearic acid, magnesium stearate, titanium dioxide, dibasic calcium phosphate, microcrystalline cellulose, fd&c yellow #5, fd&c blue #1, fd&c red #3 and fd&c yellow #6.
Does Stacker2 work?
There’s no scientific research backing the effectiveness of Stacker2. We found studies linking green tea and caffeine to weight-loss, but nothing specific to this formula.
You may want to take a long look at Stacker2 and replace it with a supplement like Leptigen, which contains ingredients clinically proven to work.
How much does Stacker2 cost?
Stacker2 costs $19.99 on the official website.
How should I take Stacker2?
You should take one Stacker2 capsule, three times per day. Each bottle contains 100 capsules or about a 30-day supply. The company recommends not exceeding three pills per day.
Can I take Stacker2 if I have a health condition?
Women who are pregnant or nursing, those with health conditions, anyone taking prescription medications of any kind or under 18 years of age should consult with a healthcare professional prior to using weight-loss supplements, including Stacker2.
What do users like about Stacker2?
Some users like that Stacker2 is a small capsule, making it easy to take and the affordability of the supplement.
What do users NOT like about Stacker2?
We found that some users didn’t like the side effects from Stacker2 and that the product didn’t help dieters lose weight.
How do I contact the Stacker2 customer service department?
You can contact the Stacker2 customer service department by emailing firstname.lastname@example.org, mailing correspondence to NVE Pharmaceuticals 15 Whitehall Rd. Andover, NJ 07821 or by calling a representative at 1-973-786-7868.
If I take more Stacker2, will I improve results?
No, you will not improve results if you take more Stacker2.
How much caffeine is in Stacker2?
Each serving of Stacker2, one capsule, contains 200mg of caffeine.
Does Stacker2 come with a guarantee?
There’s no mention of a guarantee with Stacker2.
Do you know of any special deals or discounts on Stacker2?
There are special deals and discounts on Stacker2. You will receive free shipping on all orders of $50 or more. However, the last several months have been a whirlwind with our readers taking advantage of Leptigen’s Special Trial Offer, which is simply the cost of shipping and handling. Click here to give it a try.
Stacker 2 Side Effects:
Stacker 2 is a supplement that contains ingredients such as green tea, caffeine, and white willow bark to help boost metabolism and boost weight-loss. We know that they are uncommon, but we went out and found comments from users who experienced side effects.
“The third day I was waking up with mild headaches.” Bailey
“Gave me a headache and sometimes nausea.” Gregory
“I noticed it also made me jittery and sometimes gave me a headache.” Thurston
“When I bought this product I was expecting to get a boost of energy instead I got headaches.” Fredrick
“Makes me jittery, and actually got sick to my stomach.” Dave
“I started getting weird pains in what seemed like my liver.” Bryan
“I just started taking this product last week and now I’m having problems with cramps in my legs, my whole body is jittering, and I can’t sleep.” Adam
“This product made me really sick!” Lucy
“Made me feel like my heart would explode.” Rachael
“I go to sleep and get around 7 hours of sleep (just right for me). I was barely able to wake up the last 2 or 3 mornings without feeling like I had no sleep at all.” Stephanie
We want you to have the best experience while losing weight and we don’t want you to suffer from harmful side effects, that is why we suggest you try Leptigen. It is the top fat burner we’ve seen in 2016. The ingredients have been clinically tested to and shown to help you lose weight.
Click here to check it out!
We really researched Stacker 2 ingredients to help you fully understand the specifics.
Yerba Mate (leaves)
Sometimes called green mate or hervea, yerba mate is a plant that’s often used to make beverages. It’s quite popular in certain parts of South America. It’s also used in various energy drinks sold in the US. It provides some caffeine, as well as vitamins and antioxidants.
What is it Supposed to Do?
Well, yerba mate is found in a number of weight-loss products. It’s typically claimed to boost energy levels, stimulate metabolism, enhance focus and elevate mood. These benefits are all linked to the caffeine in this herb.
According to the National Institutes of Health, yerba mate has shown some promise in mice. One study revealed, “Yerba Mate has the ability to decrease the differentiation of pre-adipocytes and to reduce the accumulation of lipids in adipocytes, both of which contribute to a lower growth rate of adipose tissue, lower body weight gain, and obesity.” Therefore, “Yerba Mate can potentially be used to treat obesity and diabetes.”
Clinical studies are certainly an important factor when it comes to finding a diet supplement. You might want to check out a product like Leptigen. It uses key ingredients that have been researched.
Green Tea (leaves)
Herbal teas are commonly consumed around the world. This is especially true in Asia. Green tea is a variety that grows in regions such as China and Japan. It differs from black tea because it’s unfermented.
What is it Supposed to Do?
First off, green tea contains both caffeine and EGCG (epigallocatechin gallate). Therefore it provides a stimulant and polyphenol. Together these components can help boost thermogenesis.
Some clinical studies have shown the benefits of green tea on weight-loss. One study from the University of Maryland Medical Center says, “Clinical studies suggest that green tea extract may boost metabolism and help burn fat.” In fact, one study revealed, “The combination of green tea and caffeine improved weight-loss and maintenance in people who were overweight and moderately obese.”
Guggulsterone (whole plant)
Also called guggul or devadhupa, guggulsterone is actually made from tree sap. Specifically, it comes from the Commiphora mukul tree, which grows in India. Sometimes this ingredient is used to treat acne blemishes.
What is it Supposed to Do?
Guggulsterone is often claimed to stimulate the thyroid gland. It’s found in many weight-loss supplements. By causing the thyroid to produce more hormones, this can potentially increase the metabolism of fatty tissue.
Unfortunately studies have shown that guggulsterone does not have much of an impact on weight-loss. For instance, WebMD states, “Research suggests that guggul does not affect body weight in overweight or obese people.” However, this plant extract has been shown to help treat acne breakouts.
Is There Anything Out There That We Think TRULY Works?
There is one diet supplement that stands out. Leptigen, which is made with ingredients that HAVE been clinically tested, is a good choice. All customers can benefit from the Special Trial Offer, currently available. Click here to give it a shot.