Why We’re Upgrading from Vitamin D3 to ADEK: A Smarter, More Complete Formula

At Keyspan, we’re always evolving—because science doesn’t stand still. We’re excited to share that we’re upgrading your current Vitamin D3 supplement to a new, enhanced ADEK formula designed to take your health optimization to the next level.

Think of it not as a replacement, but as an evolution.

This new blend of Vitamins A, D3, E, and K2 supports everything you already expect from vitamin D—and adds even more powerful, synergistic benefits backed by the latest research.

Why We’re Making the Switch

Vitamin D3 remains one of the most foundational nutrients in your health plan. It plays a vital role in immune balance, bone strength, inflammation regulation, and even mood.

But it works best when paired with complementary fat-soluble nutrients that help your body absorb, distribute, and use it effectively.

That’s where ADEK comes in.

What’s in the New ADEK Formula?

• Vitamin A: Supports immune defense, vision, skin health, and cellular repair
  

• Vitamin D3: The same highly bioavailable form already in your protocol
  

• Vitamin E (non-soy): An antioxidant powerhouse for cellular and cardiovascular health
  

• Vitamin K2 (both MK-4 and MK-7): Guides calcium into bones and away from soft tissues
  

Each of these nutrients is critical in its own right—but together, they create a nutritional synergy that helps your body operate at its best.

What This Means for You

This isn’t about correcting a deficiency—it’s about deepening the impact of an already effective strategy.

💪 Enhanced Bone and Heart Support

Vitamin D3 helps your body absorb calcium. Vitamin K2 helps guide it where it belongs—into your bones and teeth—while Vitamin E supports cardiovascular resilience.

🧠 Smarter Immune and Cellular Health

Vitamins A and D work together to support balanced immune function. Their partnership strengthens your body’s defense while maintaining calm, coordinated responses to inflammation.

🔬 Improved Nutrient Efficiency

Fat-soluble vitamins are best absorbed and used when taken together. This formula delivers them in the ideal ratio and structure to maximize benefits from every dose.

A Forward-Thinking Shift

Our original Vitamin D3 supplement has served our community well. This new formula simply builds on that foundation, reflecting:

• New findings in systems-based nutrition
  

• Your real-world biomarker data
  

• Our continued commitment to whole-body optimization
  
  

In short: you’re getting more from each capsule—with no extra effort required.

No Action Needed—Your Plan Is Already Updated

Your next shipment will include the upgraded ADEK formula, customized based on your most recent bloodwork and needs. Your health coach is also available to walk you through any questions about the change or your supplement routine.

We Evolve So You Can Thrive

At Keyspan, we don’t chase trends—we follow the data. This switch to ADEK reflects our belief that small, smart upgrades—backed by testing, coaching, and personalization—can make a big impact over time.

We’re proud to take this next step with you.

📚 Want to Go Deeper? Here’s the Science Behind ADEK

• Vitamin A + D Synergy in Immunity
  
  Mora JR, Iwata M, von Andrian UH. Vitamin effects on the immune system: vitamins A and D take center stage. Nat Rev Immunol. 2008;8(9):685-98.
  Link →

• Vitamin K2’s Role in Calcium Regulation
  
  Beulens JW, Booth SL, van den Heuvel EG, et al. The role of menaquinones (vitamin K2) in human health. Br J Nutr. 2013;110(8):1357–1368.
  Link →

• Fat-Soluble Vitamins and Nutrient Interactions
  
  Brigelius-Flohé R, Traber MG. Vitamin E: function and metabolism. FASEB J. 1999;13(10):1145–1155.
  Link →

• Benefits of Combined Supplementation
  
  Kanellakis S, Moschonis G, Tenta R, et al. Changes in parameters of bone metabolism in postmenopausal women following a 12-month intervention period using supplements with vitamin D, K, and calcium. Hormones (Athens). 2012;11(3):325–331.