First Endurance OptygenHP - 120 Capsules

First Endurance OptygenHP - 120 Capsules is a stimulant-free endurance supplement built around clinically studied ingredients designed to improve oxygen utilization, raise lactate threshold, and reduce recovery time. The formula draws on adaptogens and performance compounds — including beta-alanine — intended to support VO2 max, ATP production, and cortisol management without relying on caffeine or synthetic stimulants.

First Endurance cite studies showing OptygenHP can lower cortisol levels by 26% and increase time to lactate threshold by 42%. For endurance athletes managing heavy training loads, that combination of stress hormone control and delayed fatigue onset is the core of what this supplement is designed to deliver.