The unique effect of Stacker 4 is caused by the very high concentrations of Caffeine, Guarana, Capsicum Annuum and Yerba Mate. Stacker does only contain extracts that are standardized for the active ingredients and feels much stronger than anything you have ever experienced.

Stacker 4™ is manufactured to not waste any muscle while losing weight, Stacker burns fat only and nothing else!

Ingredients and created effects in the body

Caffeine: 300 mg per capsule.
Caffeine stimulates the metabolism of the cells by interrupting the cyclo-nucleotide fosfo-diesterase. In fact, Caffeine is a herbal medicine that stimulates the adrenal glands to produce the classic "fight or flight" syndrome. Epinephrine, nor-epinephrine and cortisol are released by the adrenals into the blood stream. For a small period all the body's energy can be channeled into survival, what results in the boost of mental alertness, strength and power. Scientists have also discovered that interrupting the cyclo-nucleotide fosfo-diesterase also duplicates the speed of releasing fat out of the stores in the human body, by blocking the receptors of Adenosine. The consequence is: less activity of adenylyl-cyclase and more release of fat. More release of fat results in a proven 40% of more fat burning.

Capsicum Annuun: part of proprietary blend 550 mg per capsule.
Capsicum, also known as cayenne, contains Capsaicin – the compound that produces the "hot" in hot peppers. Cayenne peppers have been used for centuries as a folk medicine for stimulating circulation, aiding digestion and relieving pain (topically). Contemporary uses have placed cayenne extracts as thermogenic aids to help increase metabolism.

Ginseng: part of proprietary blend 550 mg per capsule.
Researchers found (Siberian) Ginseng to be an excellent tonic to enhance athletic performance as well as to strengthen the body during times of stress.

Green Tea: part of proprietary blend 550 mg per capsule.
Polyphenols, part of Green Tea, are classified as catechins. Green tea contains six primary catechin compounds: catechin, gallaogatechin, epicatechin, epigallocatechin, epicatechin gallate, and apigallocatechin gallate (also known as EGCG). EGCG is considered to be the most active component in green tea and is the best researched of all the green tea polyphenols. Green tea also contains alkaloids including caffeine, theobromine, and theophylline. These alkaloids provide green tea's stimulant effects.

Kola Nut and Yerba Mate: part of proprietary blend 550 mg per capsule.
These natural extracts are giving you a strong energy boost, because Kola Nut and Yerba Mate are both containing Caffeine too. A side effect of Kola Nut is the drift of water from the body (dehydration). Yerba Mate is certainly an effective stimulant that can help increase the general state of arousal and enhance mental and physical performance.

Guarana: : part of proprietary blend 550 mg per capsule.
Comes from the seeds of a South American shrub. As a dietary supplement, it’s no wonder that Guarana is an effective energy booster, because it contains about twice the caffeine found in coffee beans. The effects of high dosages of caffeine a described above.