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The science of fuel.

Research, training notes, and the thinking behind every IV-X formula. Fuel as performance infrastructure, explained.

        
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FUEL SCIENCE · 8 MIN READ

Race-Day Electrolyte Timing

The objective is to start hydrated, replace fluid and electrolytes at a rate you have already tested, and avoid both significant dehydration and unnecessary overdrinking.

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              electrolytes
              ·
              6
              MIN
            

When to Take Electrolytes Before and During a Long Run

A practical, cautious race-day sequence for electrolyte use before and during long runs, built around train...

Why ENERGY Moved From 200mg to 150mg Caffeine

Why ENERGY Moved From 200mg to 150mg Caffeine ENERGY.150 was reformulated from 200mg caffeine to 150mg ca...

Cold Conditions and the Cost of Under fueling

This article outlines how cold environments alter metabolic demand, hydration dynamics, and muscular effici...

Built for Purpose

IV-X™ came to life publicly in 2025, a launch that somehow feels both impossibly recent and already part of...

Fuel Psychology: Approach Behavior and Avoidance Under Fatigue

Why most sports drinks taste great at rest but become intolerable under fatigue.

Sodium as a Thermoregulation Mechanism

A breakdown of why sodium is the critical driver of thermoregulation, sweat continuity, and late-race resil...

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// THE FULL SYSTEM · ONE BOX

The Discovery
Pack

Four flavors. Two formulas. Run both sides of the system before you commit to a case.

CONTENTS: 4 × 16 FL OZ CANS
FLAVORS: BLUE RASPBERRY PINEAPPLE PEACH WATERMELON MINT POMEGRANATE AÇAÍ

$10

4 CANS · NON-CARBONATED · ZERO SUGAR

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The science of fuel.

Race-Day Electrolyte Timing

When to Take Electrolytes Before and During a Long Run

Why ENERGY Moved From 200mg to 150mg Caffeine

Cold Conditions and the Cost of Under fueling

Built for Purpose

Fuel Psychology: Approach Behavior and Avoidance Under Fatigue

Sodium as a Thermoregulation Mechanism

The Discovery
Pack

The science of fuel.

Race-Day Electrolyte Timing

When to Take Electrolytes Before and During a Long Run

Why ENERGY Moved From 200mg to 150mg Caffeine

Cold Conditions and the Cost of Under fueling

Built for Purpose

Fuel Psychology: Approach Behavior and Avoidance Under Fatigue

Sodium as a Thermoregulation Mechanism

The Discovery Pack

The Discovery
Pack