TetraSorb Delivery™ consists of four primary ingredients. Two absorption enhancers which encourage the oral uptake of a multitude of compounds, and two metabolic modulators that help prolong the activity of ingredients by the attenuation of key enzymes. Not knocking HT, but I believe Tetra is far better. Once a capsule is ingested, it travels past the stomach and into the gut. That’s when the two, potent absorption enhancers are released.
Dodecanoic Acid 2,3-Dihydroxypropyl Ester-
Stigmast-5-en-3-ol Beta-D-Glucoside. Another natural, yet potent compound belonging to a chemical class known as Saponins
1-[5-(1,3-Benzodioxol-5-yl)-1-oxo-2,4-pentadienyl]piperidine, and it has been found to inhibit pertinent enzymes as well, including CYP and P-glycoprotein. Increased intestinal expression of P-glycoprotein reduces the absorption of substrates, thus lowering their bioavailability.
6′,7′-Dihydroxy-5-Geranoxypsoralen, and it can increase the blood levels of certain substrates and hormones by over several hundred percent! It does this by interacting with specific CYP isozymes associated with rapid first-pass deactivation of androgens
I don't know much about the other and they don't clearly explain it either, but Nutra fully details the function of each of the 4 ingredients to keep the product intact.