AmentoPump: How PDE5 Inhibition Gives Full Blood Its Edge

The supplement industry's default answer for pump is L-Citrulline. Dump in a few grams of L-Citrulline, maybe some Arginine, and call it a pump formula. Killer Labz doesn't operate that way. Full Blood was built around mechanisms — and AmentoPump is one of the most distinctive mechanisms in the formula.

 

What Is AmentoPump?

AmentoPump is a standardized extract of Selaginella tamariscina — a plant in the spikemoss family with a documented history of use in traditional medicine and a growing body of research interest in sports nutrition. The extract is standardized for Amentoflavone, a biflavonoid compound that is the primary bioactive responsible for AmentoPump's performance-relevant effects. It is Amentoflavone's pharmacological activity that drives the mechanism this ingredient is known for: inhibition of phosphodiesterase type 5, or PDE5.

The PDE5 Inhibition Mechanism

PDE5 is an enzyme. Its job is to break down cyclic guanosine monophosphate — cGMP — the signaling molecule responsible for smooth muscle relaxation in blood vessel walls. When cGMP levels are high, blood vessels dilate. When PDE5 breaks it down, that dilation ends.

 

Amentoflavone inhibits PDE5. That means cGMP levels stay elevated longer. Blood vessels stay dilated longer. Blood flow is sustained — not spiked and gone. This is fundamentally different from the mechanism used by arginine or citrulline, which work by increasing nitric oxide production rather than protecting existing cGMP. AmentoPump adds a second, complementary pathway to the pump equation.

 

Why This Matters Inside Full Blood

Full Blood doesn't rely on a single mechanism. The formula layers five clinical-grade ingredients across multiple vasodilation and pump pathways: GlycerPump for hyperhydration and plasma expansion, Nitrosigine for sustained arginine-driven NO elevation, AmentoPump for PDE5 inhibition and cGMP protection via Amentoflavone, S7 for endogenous nitric oxide production, and BioPerine for systemic absorption.

AmentoPump isn't in the formula to fill a label. It's there because Amentoflavone works differently than everything else in the stack — and that difference is measurable in every session.

If your pump supplement is built on L-Citrulline alone, you're getting one pathway. Full Blood gives you five. 💀