This time, it’s personal
Keyspan decodes your body’s unique data and creates a plan that’s just right for you.
Our story
Years ago, our founder faced a health crisis. Frustrated with the limitations of his family doctor, he dove into the complex world of preventative care. It was intimidating and expensive, and there didn’t seem to be a straightforward solution. He eventually got the help he needed, but it was a huge investment in time, money and energy.
Keyspan was created so you won’t struggle with generic advice, pricey treatments, and figuring it out on your own. We put the science, support, and expertise you need in one place so you can live a happy, healthy life.
Our platform brings the science of longevity, and the expertise of functional health coaches directly to you, simplifying the journey to better health — moving you from “just fine” to optimal.
Why Keyspan
A more effective path to wellness
Business & Clinical Leadership
Your very own dream team
Meet the people you need to lead your healthiest, happiest life. Our clinical experts will get you from okay to optimal—no matter your starting point.
Hey Kai — I’ve been waking up exhausted even after 8 hours of sleep, and my afternoon energy crashes have been getting worse lately. Could this be connected to my cortisol, iron, or blood sugar markers, and what changes would you prioritize first?
thinking...
Kai
Your AI Health Guide
Powered by your biomarkers, wearable data, and daily habits
Kai turns complex health data into clear daily guidance — helping you know what to eat, how to train, when to recover, and which supplements support your progress.
Intelligence.Secured.
With KeySpan, you don't just improve how you feel today — you build the foundation for long-term vitality, longevity, and everyday performance.

What is Keyspan?
How does a Keyspan membership work?
Who is Keyspan for?
What are the benefits of membership?
What biomarkers do you test?
Is Keyspan comprehensive for women & men’s health?
What’s Keyspan’s methodology for ranges? How does this differ from what I might find elsewhere?
Why is my first month $299 if I live in NY/NJ/RI?
What is Truemed?
Can I use my HSA or FSA to pay for Keyspan?
Direct Payment: You can pay directly with your HSA/FSA card at checkout.
LMN Required: Any product or service that involves supplements requires a Letter of Medical Necessity (LMN). Truemed makes this quick and easy during checkout.
What is a Letter of Medical Necessity (LMN)?
How does it work at checkout?
2. Choose “Pay with HSA/FSA via Truemed.”
3. If a product includes supplements, Truemed will guide you through a short intake to generate your LMN.
4. Pay directly with your HSA/FSA card, or submit for reimbursement if required.
Why use Truemed?
Simple process — Truemed handles all paperwork.
No doctor visits needed.
Works for all Keyspan products and services.






