Stacker3 ReviewStacker3 is a diet and energy supplement that contains chitosan and was developed to help improve metabolic rate and fat burning. This latest version of the formula is “ephedra free” according to the manufacturer and may still produce a thermogenic response that allows it to be a dynamic energizer and fat burner.

A Thermogenic Boost

Based on the Stacker3 ingredients, there is a good chance that this OTC diet pill can trigger a thermogenic response in the body. For instance, in this formula you will find:

– Chromium

– Green Tea

– Taurine

– Garcinia Cambogia

– White Willow Bark

– Chitosan

– Caffeine

The main thermogenic ingredient in the Stacker3 formula is caffeine. In addition to it being an actual ingredient, caffeine can also be found in green tea. That being said, although the thermogenic effects of caffeine may be beneficial in helping to boost metabolism, burn calories and/or burn fat, too much of this stimulant in your system can cause negative side effects that might not make taking it worth the risk.

As for chitosan, which has received specific mention on the Stacker3 product label, this ingredient is believed to help boost fat loss by binding fat in the body so that the body can excrete more of it. There is no solid clinical proof that this is true.  With that said, keep in mind that chitosan comes from shellfish, so anyone with a known shellfish allergy should avoid taking Stacker3.

Stacker3 Is a Stimulant Supplement

The suggested use is to take 1 capsule (1 serving size) after meals and not to exceed more than 3 capsules in a 24-hour period. There is 250 mg of caffeine per serving (not including the additional amount in the green tea), which means the maximum 3 pill dose provides 750 mg of caffeine, which is well over the 400 mg daily dose that is considered safe for most healthy adults who are not sensitive to stimulants.

With this high amount of caffeine, there is little doubt that anyone who takes this product will experience some form of negative caffeine-related side effect, such as:

– Insomnia

– Jitters

– Headache

– Upset stomach

– Anxiety

– Rapid heartbeat

– High blood pressure

It should also be noted that when this Stacker3 review was created, some researchers warned that taking white willow bark may interfere with the body’s response to COVID-19. However, there is no strong clinical evidence to support this warning. Still, it would be best not to take this warning lightly as there is also no scientific proof that taking white willow is good if you have the virus.

Ultimately, it would be in your best interest to consult with your health care provider before taking Stacker3 to be on the safe side.