97% of dieters just want a product that’s effective. Yeah, we don’t understand the remaining 3%, either. We concentrated on Stacker 3 side effects, ingredients, scientific research and quality of customer service. We dissected hundreds of consumer comments and reviews. Then, we refined and summarized to give you the info you need.
What is Stacker 3?
To start, Stacker 3 is a fat-burner containing green tea, taurine, chromium, garcinia cambogia extract, white willow bark, chitosan and caffeine 250mg. The recommended dose is one capsule, three times per day. Supposedly, it increases energy levels and weight-loss. The small size of the pill makes it easy to take on-the-go.
The supplement was introduced by NVE Pharmaceuticals Inc in 2003. You can purchase the supplement at your local retail stores by the bottle or in blister packs. We do like that the cost is reasonable and that a few Stacker 3 ingredients are natural, but read on…
Stacker 3 Side Effects – “Out of Body Experience?”
The first concern regarding the Stacker 3 side effects was stomach pains. “When you take thermogenic supplements, you will notice changes like increased energy,” said our Research Editor. “But, dieters don’t expect adverse reactions.”
“I used stacker 3 xplc to improve my energy at work. I thought everything was ok at first but after a year of one pill a day it affected my kidneys. No stars only pain and regret,” commented a dieter.
“I took these once a day for five days with meals. On the fifth day I started experiencing serious side effects like dizziness, numbness in my fingers, and rapid heartbeat,” stated a user.
According to some Stacker 3 reviews, side effects are rare.
“After about a week or so I noticed that my energy level was higher and my workout intensity was slightly improved,” stated a user.
FDA Advisory – “A Major Concern?”
On several occasions, NVE Pharmaceuticals Inc. has been contacted by the FDA due to mislabeling supplements. In April of 2004, the company received a letter warning of undisclosed ephedra in products. In September of 2012, the business received additional correspondence highlighting formulas with claims that were misleading.
Ineffectiveness – “Doesn’t Work?”
After researching, we found multiple cases where customers said Stacker 3 ingredients were ineffective. “I started this 1 month ago, using it as directed with normal diet & regular exercise, & I’ve gained 8 pounds!,” states a consumer.
“When I was taking it I didn’t lose any weight, I actually started gaining it!,” said a dieter.
We found that some users did notice changes while using Stacker 3.
“The product has not helped me lose weight, but it does give me enough energy to exercise and work around the house for a few hours,” said a user.
“It has the caffeine equivalent of around 2 large cups of coffee and I feel it keeps me going through a long days work,” reported another.
According to our research, if there is one issue, like ineffectiveness, chances of long-term success could be reduced. If Stacker 3 doesn’t produce results, we have concerns.
The Science – “Valid?”
There’s limited information relating to the scientific research supporting weight-loss claims. The caffeine in Stacker 3 may boost metabolism, but there’s no science showing the effects relate to this formula. For us at DietSpotlight, having published clinical data backing information is critical. If there’s no science-based information, what’s to keep the dieter around?Also: read our Leptigen Weight-Loss Kit review »
The Bottom Line – Does Stacker 3 Work?
So, will you lose weight with Stacker 3? Well, we like the longevity of the company and the inclusion of a few natural ingredients, but we have reservations about it because of the lack of published clinical research connecting it to weight-loss. We’re also concerned about the side effects and lack of results mentioned in customer reviews.
If you’d like to transform your body, we recommend going with a supplement that contains ingredients supported by published clinical studies with no reported harmful side effects.
Among the best products we’ve seen this year is one called Leptigen. The formula contains a four-ingredient, proprietary blend, shown in published scientific research to help enhance metabolism and spark fat loss. There are no comments about harmful side effects, but consumers are noticing amazing results.
Also, the makers of Leptigen are offering a Special Trial Offer. A good choice and a sign of confidence.
Previous Stacker 3 Review (Updated August 5, 2014):
What You Should Know about Stacker 3Stacker 3 is a dietary supplement that is marketed toward men and women who desire assistance with weight loss. This supplement is manufactured by NVE Pharmaceuticals Inc. and sells in common drugstores, supermarkets and nutritional stores. Stacker 3 claims to burn away unwanted fat and boost energy levels. It sells in the form of a capsule and is directed to be taken daily with water. There are no customer testimonials for Stacker 3 offered on the official website. There are no free trial samples of Stacker 3 available. There doesn't appear to be a 100% money-back/satisfaction guarantee posted on the website for Stacker 3. Aside from this product, you may want to take a closer look at TruBio Trim as it is a probiotic supplement that is used to reduce excess fat, boost the metabolism by enhancing digestive support and induce rapid weight loss. The primary active ingredient offered in Stacker 3 supplements is Chitosan, which metabolizes fat. Similar to many other weight loss drugs, Stacker 3 is intended to be taken in conjunction with a healthy diet plan and regular exercise. No one under the age of 18 years old should consider taking Stacker 3 supplements. This dietary drug is not available via the official website. The website does not claim that Stacker 3 suppresses appetite. A full product ingredient list is not found on the website. NVE Pharmaceuticals Inc. additionally manufactures supplements like Stacker 2, 7-Phenyl Stack, Yellow Hornet and Swarm Energy. As it comes right to it, Fat Magnet promotes weight-loss by blocking the absorption of fat with few natural ingredients.
List of Stacker 3 IngredientsNot available on the official website.
Product FeaturesStacker 3 is a weight loss supplement that is claimed to help women and men reduce body fat. Similar products that claim to help burn fat are Vintage Burn and Quadralean. This dietary drug comes in capsule form and aims to increase energy as well. The key active ingredient found in Stacker 3 is Chitosan, which is a marine animal extract. Although this weight reduction product does not sell via the official website, it can be acquired in drugstores, supermarkets and nutritional stores. There doesn't appear to be any real clinical evidence provided on the official website to support the claimed effectiveness of Stacker 3 supplements. Warnings for this product are not offered on the website.
Advantages of Stacker 3
- Stacker 3 comes in an easy-to-manage capsule form.
- Stacker 3 can be easily purchased in most common supermarkets and drugstores.
- Stacker 3 is suitable for both women and men, but not for individuals under the age of 18.
Disadvantages of Stacker 3
- A full product ingredient list for Stacker 3 is absent from the official website.
- There are no customer testimonials provided on the official website for Stacker 3 supplements.
- There isn't any clinical evidence presented on the official website to support the overall effectiveness of Stacker 3 capsules.
- Stacker 3 doesn't appear to be offered with a 100% money-back guarantee.
- Some ingredients found in Stacker 3 may not be suitable for some individuals.
- No free trial samples of Stacker 3 are offered via the official website.
ConclusionWhen all is said and done, Stacker 3 is presented like many weight loss supplements. While it's claimed to boost energy levels and burn away fat, there is no clinical evidence to support this on the official website. What we like about this product is its intake of caffeine which has been known to help block adenosine receptors, a chemical found in the brain that causes you to feel fatigued or less energized. Furthermore, it would be nice to see some customer testimonials, a money-back guarantee, a full product ingredient list and free trial samples of Stacker 3 offered on the official website. When a manufacturer goes to the trouble of supporting their products this way, it shows that they really believe in what's being sold. It's probably prudent to consult your physician prior to taking Stacker 3 supplements.
Stacker 3 Questions & Answers:
We sorted through hundreds of customer reviews as well as the official Stacker 3 website to find the valuable information you’re looking for to create this helpful FAQ.
What are the side effects of Stacker 3?
Stacker 3 side effects may include nausea, jitters/shakes, and weakness.
What are the ingredients in Stacker 3?
Stacker 3 ingredients are kola nut, cactus extract, white willow bark, grapefruit extract, chitosan, caffeine, green tea, guarana, and garcinia. Other ingredients include gelatin, dextrose, stearic acid, magnesium stearate, titanium dioxide, Red 3, Blue 1, Red 40 and Yellow 5.
Does Stacker 3 Work?
Stacker 3 has helped some people lose weight, but there are many others who didn’t get any results. Chitosan has been studied for cholesterol management and weight-loss. The studies showed no significant effects after using the supplement for four weeks. Other ingredients in this formula have not been studied.
How much does Stacker 3 cost?
Stacker 3 is available for $16.49 a bottle with free shipping at Amazon. The list price is $31.99 so the price could change at any time. Each bottle contains 100-capsules..
How should I take Stacker 3?
Take one capsule after every meal, but do not exceed three capsules in a day. Bear in mind that the caffeine in this formula can affect sleep, so it may be wise to avoid taking it within six hours of bedtime, if you are sensitive to caffeine.
Can I take Stacker 3 if I have a health condition?
If you are suffering from any health condition, or using prescription medication, talk to your doctor to see if you are healthy enough for this product. Do not take if you are pregnant, nursing, or under the age of 18.
What do users like about Stacker 3?
Many users liked how easy it was to take, and that the formula is ephedra free.
What do users NOT like about Stacker 3?
Some users found the side effects bothersome. Others complained about the lack of an official website, concerns over past run-ins with the FDAand ineffectiveness.
Can I use Stacker 3 if I am allergic to shellfish?
No, the chitosan is made from the shells of shellfish and could cause an allergic reaction. Stacker 2 offers the same basic formula without the chitosan fat blocker.
How do I contact the Stacker 3 customer service department?
You can contact the Stacker 3 customer service department by calling 1-973-786-7868, emailing email@example.com or by using the feedback form on the official website.
Can I contact Stacker 3 through social media?
Do you know of any special deals or discounts on Stacker 3?
There are special deals or discounts Stacker 3. The company offers free shipping on purchases of $50 or more. However, we noticed that the last several months have been racing by with our readers taking advantage of Leptigen’s Special Trial Offer. To learn more, click above.
Stacker 3 User Tips:
7 Top User Tips
Over the years, we’ve become aware that Stacker 3 users have some strong opinions. After consulting thousands of comments and reviews, we put together these tips that may help you learn more about this product.
“It is a stimulant and you will react to these just like you react to any other large dose of caffeine. This can include shakes, jitters, trouble falling asleep potentially for several hours after taking it. Start with a single dose after a meal to judge your reaction.” Mitch
“It does work, but it does have side effects. They are worse if you don’t eat properly and just take the capsule.” Leslie
“I wouldn’t recommend taking them after at least 8 hours before you are wanting to go to bed.” Abel
“It’s important to cycle off this product to give your body a break.” Teri
“If you take it at night be prepared to feel like you had an espresso after dinner.” Ronda
“It isn’t the diet. It just supports your diet. Nothing makes up for poor nutrition.” Carey
“These pills are meant to help you get better results from dieting and exercising. Remember that and put forth effort on your end and they will help.” Nick
Stacker 3 Scientific Abstracts:
Green Tea Extract
There had been significant weight-loss from 76.8 ± 11.3 kg to 75.7 ± 11.5 kg (p = 0.025), in addition to a reduction in body mass index (p = 0.018) as well as waist circumference (p = 0.023) following 12 weeks of a high-dose green tea extract treatment. The study had also shown examples of a constant trend of reduced total cholesterol, up to 5.33%, as well as reduced LDL plasma levels. In conclusion, it had been shown that 12 weeks of treatment with high-doses of green tea extract had led to substantial weight-loss, decreased waist circumference and a steady reduction in total cholesterol as well as LDL plasma lipids without any adverse side effects. 
Garcinia Cambogia Extract
Upon examination of the meta-analysis, it had been revealed that a statistically minor difference in weight-loss favoring hydroxycitric acid over placebo (mean difference: −0.88 kg; 95% confidence interval: −1.75, −0.00). In one study, there were twice as many negative gastrointestinal events recorded in the hydroxycitric acid group in comparison to placebo. It was concluded that randomized clinical trials indicate that Garcinia extracts can trigger weight-loss in the short-term. The magnitude of these activities is small and the clinical importance remains to be concrete. There need to be future trials with a more in-depth report. 
Mean alterations in body weight were-1.78 ± 1.37kg and -3.10 ± 1.95kg on the 45th day and at 90 days respectively within the chitosan group, which had been substantially different (p < 0.0001) in comparison to placebo. Body mass index had been reduced by 10.91 fold in comparison to placebo following administration for 90 days. Along with these findings there was also a decrease in anthropometric parameters and body composition combined for an improved QoL score. Chitosan had also been able to decrease HbA1C levels (below 6 %) in participants whose values were initially higher. Mean caloric intake displayed that there had been no differences in dietary habits of participants in either group. The lipid levels had not been affected and the adverse effects reported were minor and unrelated to the treatment in the study. Chitosan (from fungal origin) was successful in decreasing mean body weight up to 3kg throughout the 90 day period of the study. In addition to this, there had been an improvement in anthropometric parameters, body composition and HbA1C, showcasing the overall benefits for overweight consumers. There had also been an improvement in QoL score and was found to be safe and very well tolerated by all participants. 
- 1. Therapeutic effect of high-dose green tea extract on weight reduction: A randomized, double-blind, placebo-controlled clinical trial (2015). Clinical Nutrition. November 15, 2016.
- 2. The Use of Garcinia Extract (Hydroxycitric Acid) as a Weight loss Supplement: A Systematic Review and Meta-Analysis of Randomised Clinical Trials (2011). Journal of Obesity. November 15, 2016.
- 3. Single-blind, placebo controlled randomised clinical study of chitosan for body weight reduction (2015). Clinical Nutrition. November 15, 2016.
Stacker 3 Side Effects:
Side effects are not normal in those who take Stacker 3 pills, but some have been noted by dieters and consumers. These do not signify the majority, but there are risks when taking any dietary supplement.
“Only thing your breath isn’t so pleasant when taking the tablet but they work!” Brendetta
“I did have all the worst side effects, including palpatations, restlessness, et cetera.” John
“This product definitely curved my appetite. With the consequence of not being able to sleep a wink.” Dylan
“First time cycling them kinda had the jitters.” Chris
“If you take too much you will get jittery.” Nicolle
“Not bad but a bit too much caffeine. Or something in it makes me jittery.” William
“Gives you the jitters at first, but keeps you going all day.” Laura
“Oh but it did increase the amount of my sweat.” Charlee
“Gives you the jitters for a couple of days.” Moreno
“These things will get your bowels moving, especially in the morning” Charlie
We are all about reducing the chance of side effects when taking dietary supplements. We have noticed that Stacker 3 reviews are remarkable with very few objections.
While natural weight-loss supplements may seem like a safe option, there’s no guarantee of safety. Any supplement has the ability to cause an adverse reaction. Stacker 3 side effects may not be very common, but that doesn’t mean they are not real for some users.
When you feel frail or fragile, it may be described as weakness. You lack strength and may even struggle to stand when you feel weak. Weakness and fatigue are often categorized as the same and come with the same symptoms.
What causes weakness?
Weakness may be caused by overworking or over exercising. In rare cases, muscle weakness could be due to an electrolyte imbalance, an infection or an issue with the thyroid gland. It may also be caused by Guillain-Barre syndrome or Myasthenia gravis in very rare cases. 
A gross feeling of sickness, nausea may make you feel like you’re going to vomit. However, it doesn’t always cause vomiting, but it’s always an unpleasant feeling in the stomach.
What causes nausea?
Usually, the timing of nausea points to the cause. If you can remember what you ate, drank or took (medication or supplement) a few hours or less before the nausea started, it will lead to the cause. However, it may also be caused by an ulcer, bulimia, gastritis or food poisoning.
Vibrating muscles are known as the jitters or shakes. It may also be described as trembling and may be very uncomfortable. Sometimes, people experience the jitters or shakes when they are nervous or before a big event, such as speaking in front of people.
What causes jitters/shakes?
The jitters/shakes may be caused by anxiety or a panic attack. It’s also possible to get the jitters when you drink too much caffeine or use tobacco.
If it feels like your heart is going to jump out of your chest or it’s racing, it’s known as rapid heartbeat. This is any heart rate of more than 100 beats per minute and known as tachycardia. Tachycardia comes in three types: Atrial, Supraventricular tachycardia or Supraventricular tachycardia Atrial.
What causes rapid heartbeat?
Some of the most common causes of a rapid heartbeat include heart-related issues, high blood pressure, poor blood supply to the heart, heart failure, heart valve disease, tumors, infections, alcohol abuse, drug abuse, electrolyte imbalance, thyroid disease, lung diseases, emotional stress, overuse of caffeine and some medications. It’s a common side effect of diet supplement, as well.
A range of sensations including weak, unsteady, fainting or woozy feelings describes dizziness. It may make you feel like your surroundings are spinning and it may be a sign of vertigo.
What causes dizziness?
Dizziness may be caused by many things including alcohol, medications and migraine headaches. It may also be associated with an issue with your inner ear or with vertigo.
Stacker 3 side effects don’t happen in most users, but some have reported weakness, nausea, jitters/shakes, rapid heartbeat and dizziness. Before starting any new supplement, speak with your doctor about the risks, especially if you’re under 18, pregnant, nursing, have a medical condition or you take prescription medication.
Stacker 3 is a caffeine-heavy fat burner from the Stacker 2 company. There's no doubt several of the ingredients have been studied and shown to have a positive impact on weight-loss. However, the majority are in a proprietary blend, so we've no idea if enough is included.
Stacker 3 Ingredients and Supplement Facts
Serving Per Container: 100
|Amount per Serving||% DV|
|- Green Tea Leaves||*||*|
|- Garcinia Cambogia Extract||*||*|
|- White Willow Bark||*||*|
Other Ingredients: Gelatin, stearic acid, magnesium stearate, titanium dioxide
We really researched the Stacker 3 ingredients in order to give you the important facts and details you need.
Chromium picolinate is a mineral and chemical compound that’s found in a number of dietary supplements. It is an important mineral found in foods like tomatoes, broccoli, romaine lettuce, oats, green beans and barley. It’s imperative for overall health and wellness.
What is it Supposed to Do?
Often chromium picolinate is a key ingredient found in weight-loss supplements. It’s intended to help regulate blood glucose levels and control food cravings. It also assists by converting carbohydrates, proteins and fats into energy.
There is some research that ties chromium picolinate to weight reduction. For instance, “A study published in Diabetes Technology & Therapeutics in 2008 found that chromium picolinate supplementation helped overweight women who had carbohydrate cravings to better control their appetite and the amount of food that they ate, although it didn’t lead to a significant amount of weight-loss over the course of the 8-week study.”
Green Tea Leaves
Unlike oolong and black varieties, green tea is unfermented. It is widely consumed in Asia, and it’s well known for its health benefits. Also called camellia sinensis, these leaves are often said to help prevent cancer, boost immune system health, reduce cholesterol levels and even aid with weight reduction.
What is it Supposed to Do?
Green tea extract is used in a number of herbal weight-loss supplements that are available over-the-counter. This ingredient is supposed to help boost metabolism and reduce unwanted body fat. It contains caffeine (a stimulant) and EGCG or catechins (antioxidants).
According to the University of Maryland Medical Center, “Clinical studies suggest that green tea extract may boost metabolism and help burn fat. One study found that the combination of green tea and caffeine improved weight-loss and maintenance in people who were overweight and moderately obese.”
Taurine is essentially an amino sulfonic acid. Amino acids are the building blocks of protein. Some foods that contain this component include beef, sea algae, lamb, salmon and dungeness crab. It’s also found in significant portions in the human heart and brain.
What is it Supposed to Do?
There are many energy drinks, workout supplements and weight-loss products that contain taurine. This amino acid is supposed to help boost energy levels, burn off fat, prevent lean muscle loss and provide antioxidant protection from free radicals.
There does not appear to be a direct correlation between taurine and weight reduction. However, according to WebMD, “Taking 2-3 grams of taurine by mouth one to two times daily for 6-8 weeks seems to improve heart function and symptoms in patients with moderate heart failure (New York Heart Association (NYHA) functional class II) to severe heart failure (New York Heart Association (NYHA) functional class IV). Some patients with severe heart failure rapidly improve from NYHA class IV to II after 4-8 weeks of treatment. Improvement seems to continue for as long as taurine treatment is continued, up to one year.”
We’ve found that side effects are rare when is comes to dietary supplements. That’s why one that’s caught our attention is Leptigen. There’s no mention of adverse reactiions and customers are seeing great results. Click above to learn more.