Promix D3 (5,000 IU) + K2

Your training demands everything from your body. But here's what most athletes don't realize: you can't outwork vitamin D deficiency. Low D levels mean weaker muscles, slower recovery, more injuries, and a immune system that crumbles during peak training blocks.

Promix D3 (5,000 IU) + K2 is your daily insurance policy against the performance tax of deficiency. This isn't just vitamin D—it's a strategic combination that ensures calcium actually reaches your bones instead of building up where you don't want it.

What Makes Promix Different

5,000 IU of D3 That Actually Works – Most athletes are chronically low in vitamin D, especially if you train indoors, live north of Atlanta, or slather on sunscreen. This therapeutic dose gets your levels where they need to be—between 50-80 ng/mL for optimal performance.

K2 Keeps Calcium Where It Belongs – Here's the problem with taking D3 alone: it increases calcium absorption, but doesn't tell your body where to put it. K2 (in both MK-4 and MK-7 forms) acts as calcium's GPS, directing it to your bones and teeth while keeping it out of your arteries. That's not just performance—that's longevity.

MK-4 and MK-7 Forms –  The MK-4 form works fast for acute needs, while MK-7 has a longer half-life for sustained protection. Together, they ensure every milligram of calcium goes exactly where your body needs it.

The Science Made Simple

Vitamin D3 works like a hormone in your body, activating over 1,000 genes linked to muscle function, immune response, and testosterone production. But here's the catch: D3 pulls calcium into your bloodstream. Without K2, that calcium can end up calcifying arteries instead of strengthening bones.

Most athletes benefit from year-round supplementation. Even in summer, factors like training indoors, early morning/evening training sessions (avoiding peak sun), and sunscreen use limit natural D3 production. Winter months are when deficiency risk is highest, but maintaining optimal levels year-round supports consistent performance.

How to Use Promix D3 + K2

Daily Dose: Take 1 capsule every morning with breakfast or any meal containing fat (avocado, eggs, nut butter). D3 is fat-soluble—it needs dietary fat for maximum absorption.

Timing Matters: Morning is ideal because D3 can interfere with melatonin production if taken too late. Keep it consistent with your AM routine.

Pro Tip: Get your vitamin D levels tested before and after 3 months of supplementation. You're shooting for 50-80 ng/mL—the sweet spot where athletes see measurable performance gains.

Who's Using It

Endurance coaches recommend 5,000 IU daily for athletes training 10+ hours per week. Studies on collegiate athletes show those with optimal D3 levels experience 50% fewer respiratory infections during heavy training blocks. Professional cycling teams have made D3 + K2 supplementation mandatory after research linked deficiency to increased stress fractures.