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Optygen

Visit the First Endurance store

Optygen is a stimulant-free endurance supplement designed to help athletes perform at a higher level during demanding training blocks and race preparation. Built around clinically studied adaptogens like Rhodiola Rosea and Cordyceps, Optygen supports improved oxygen utilisation, increased VO2 max, and enhanced lactate threshold so you can push harder for longer.

  • Supports increased oxygen utilisation and VO2 max
  • Helps improve lactate threshold during intense efforts
  • Designed to reduce lactic acid build-up
  • Supports adaptation to high levels of physical stress
  • Stimulant-free formula with no caffeine
  • Contains clinically researched Rhodiola Rosea and Cordyceps
  • Supports endurance performance during long training blocks
  • Helps improve recovery and training consistency
  • Includes chromium to support energy metabolism
  • Ideal for endurance athletes training at high intensity

Optygen

Visit the First Endurance store

€68,11
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How to use?

Take Optygen daily with a meal, ideally in the morning, following the loading and maintenance phases for best results.

Calculate how much you need here

When to use?

Use Optygen during intense training periods, race preparation, and heavy endurance blocks where recovery and performance demands are highest.

Why do I need this?

Optygen helps your body adapt to physical stress, improve oxygen efficiency, and delay fatigue so you can train and race harder for longer.

Who uses this?

Runners, cyclists, triathletes, and endurance athletes looking to improve aerobic performance, threshold efforts, and recovery during demanding training.

Description

Unlike quick-hit stimulant products, Optygen works progressively over time, helping the body adapt to repeated physical stress and intense endurance training.

Developed with endurance athletes in mind, Optygen focuses on improving the body's ability to cope with oxygen demand during hard efforts. Whether you are climbing steep gradients, pushing through threshold sessions, or racing long-distance events, the formula is designed to reduce the impact of lactic acid build-up and improve efficiency under fatigue. Clinical research has shown improvements in time to lactate threshold, helping athletes sustain harder efforts before fatigue takes over.

At the core of Optygen are two Himalayan adaptogens traditionally used in extreme environments. Rhodiola Rosea and Cordyceps have been researched for their role in supporting endurance performance, oxygen uptake, and resistance to physical stress. Combined with the ATPro™ Matrix and biologically active chromium, the formula also supports energy metabolism and efficient fuel utilisation, helping athletes maintain steady energy output while preserving muscle during long periods of training.

Optygen is best suited for runners, cyclists, triathletes, and endurance athletes looking for long-term performance support rather than a short-term stimulant effect. It works best when taken consistently during heavy training phases, helping athletes recover, adapt, and perform at a higher level throughout demanding blocks of training and racing.

How does it work

Optygen works by supporting the body's ability to adapt to hypoxic and high-stress conditions often experienced during endurance training and racing. Its two primary adaptogens, Rhodiola Rosea and Cordyceps, have been clinically researched for their ability to improve oxygen utilisation, support aerobic capacity, and increase tolerance to fatigue. These ingredients help athletes sustain harder efforts by improving how efficiently oxygen is delivered and used throughout the body.

The formula also includes the ATPro™ Matrix alongside chromium nicotinate glycine chelate to support energy metabolism and fuel efficiency. Chromium plays a role in regulating glucose metabolism and helping the body process carbohydrates more effectively for energy production. Combined, these ingredients help support steady energy output, reduce reliance on muscle glycogen, and improve the body's ability to recover and adapt during periods of sustained physical stress.

Nutrition

Tub (90ct)

Serving Size: 3 Capsules

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Serving Per Container: 30

Amount Per Serving
Chromium 200mcg

Ingredients

Directions of use

Loading Phase: Take six capsules every morning for 7 days. Maintenance Phase: After loading, take three capsules every morning with a meal.

About First Endurance

First Endurance has been redefining endurance nutrition for over 20 years with clinically effective formulas trusted by elite athletes. From fuelling to recovery, every product is designed to help you perform at your best.