

Synephrine (bitter orange) – This is a less potent fat burner which is a relative of Ephedrine.
https://examine.com/supplements/synephrine/
Ephedrine – It is able to induce fat loss via increasing the amount of fat available for fuel as well as by increasing heat expenditure. It has been implicated in increasing the metabolic rate by up to 5% in humans. It has also been noted to cause serious side-effects in some instances, and its legal status varies by region.
Acetylsalicylic acid (ASA) – Used to relieve pain, fever and inflammation. It is highly synergistic with ephedrine.
http://chealth.canoe.com/drug/getdrug/Acetylsalicylic-Acid-by-Pharmetics-Inc
Ephedrine is highly synergistic with Caffeine, and for this reason is commonly found in something called an ECA stack (Ephedrine, Caffeine, and Aspirin).
Caffeine – It stimulates the central nervous system (CNS), heart, muscles, and the centers that control blood pressure to give you an extra boost and hit that PB. This is found in Instant Knockout which we massively rate.