It starts quietly.
Metabolic decline is a gradual slide in how well your body manages energy, blood sugar, inflammation and recovery. It happens system by system, long before it is obvious.
Longevity you can actually feel.
Advanced bloodwork, the supplements worth taking, and a physician-led team to make sense of it all.
Three ways in. One system behind them.
Rethryv is physician-led metabolic health and longevity. Start with one piece, or hand us the whole thing.
The Program
Six months, handled by one team.From $299/moSee the Program
Supplements
Research-backed formulas for energy, heart health, metabolism and recovery.*From $27.95Shop supplements
Bloodwork
Know your numbers, then go through them live with a physician. Free with every panel.From $49Explore bloodwork
What if it isn’t aging?
It isn’t just getting older. It’s your body raising a flag.
Many people who come to us have been told their labs look normal. They still feel like a slower version of themselves. That gap usually has a name: metabolic decline.
Tap any that sound familiar
Pick as many as you like. Nothing is saved or sent.
“Normal” is built to catch disease.
Standard lab ranges are designed to flag problems that are already there. They are not designed to show you drifting toward one. A Rethryv physician reads for both.
It leaves a trace.
How you handle fuel, how much inflammation you carry, how your thyroid and hormones are set. All of it shows up in your blood, and once it is measured it stops being a mystery.
Fine is not the same as well.
See what bloodwork can showBloodwork, read with you
Most lab results arrive as a PDF. Ours come with a physician.
Every Rethryv blood panel includes a free, live review call. A Rethryv physician walks you through every result: what is optimal, what to watch, and exactly what to do next.
Example resultsSample
Blood sugar handling
Watch
Inflammation
Optimal
Thyroid
In range
Vitamin D
Low
ApoB
Optimal
Live review call
Your Rethryv physician
One-on-one, every marker in plain language
Your path forward
- What is optimal, not just normal
- What to change first
- Which supplements fit your numbers
- When to retest
-
Choose your panel
Eight panels, from $49. Add more than one and they are combined into a single draw.
-
We book it all for you
Within about one business day, we schedule your blood draw and your review call together, so nothing slips.
-
A quick draw near you
At an accredited lab close to home. We send prep instructions first, including whether to fast.
-
Your review call
About 10 to 12 days after your draw, a Rethryv physician walks you through every result, live and one-on-one.
Included with every panel
- A blood draw at an accredited lab near you
- A live review call with a Rethryv physician
- Your results read against optimal, not just normal
- Clear next steps, and when to retest
Explore bloodwork
Panels from $49
The daily protocol
The five we put behind every protocol.
Whatever else you take, these are the ones we would not leave out. Chosen from what shows up most consistently in our clients’ bloodwork, at doses the research is built on.
The complete protocolLongevity BundleThe five foundational supplements. One complete daily stack.BioFiberCreatine MonohydrateCardio PlusMethyl+D3 + K2Coming soonSee the bundle →
Or build it one at a time
The evidence
Chosen for what the research actually shows.
Every formula earns its place on published evidence and a dose that matches it. Pick one to see why.
Strength and cellular energy
One of the most researched supplements in the world.
Not just for athletes. Creatine refills the energy reserve in your muscles and brain, and helps preserve lean muscle as you age.*
View the formula
500+peer-reviewed studiesSupporting muscle performance, metabolic health and cellular energy*
One ingredient. 5g per serving.
Digestion and metabolic balance
One fiber that steadies blood sugar and feeds your gut.*
The gel moderates post-meal glucose, binds bile acids, and ferments in the colon to produce short-chain fatty acids including butyrate.
View the formula
1,450mg per servingPure psyllium husk, 725mg per capsule
Two capsules daily. 60-day bottle.
Cardiovascular and cognitive
The two omega-3s with the strongest evidence behind them.
EPA supports healthy triglycerides and inflammatory signalling. DHA is the primary structural fat in brain tissue and the retina.
View the formula
1,400mg EPA + DHA per serving800mg EPA and 600mg DHA in two softgels
Anchovy-sourced. PCB tested to Proposition 65.
Bone and arterial health
D3 absorbs the calcium. K2 decides where it goes.*
K2 activates osteocalcin and matrix GLA protein, anchoring calcium into bone and away from arterial walls.
View the formula
72hour half-lifeMenaQ7 MK-7 stays active between daily doses
5,000 IU D3 with 60mcg MenaQ7.
Methylation and cellular repair
Active B vitamins your body can use straight away.
Methylcobalamin and BioFolate deliver B12 and folate the body uses directly, regardless of MTHFR gene status.
View the formula
13standardised extractsA 400mg phytonutrient blend
With patented DeltaGold tocotrienols.
Protein and recovery
20g: the amount research links to maximum muscle building.*
Pea, pumpkin seed and chia combine to cover the full amino acid spectrum, plus 4g of whole-food fiber.
View the formula
20g per servingThree plant sources, complete amino acid profile
No soy, dairy or gluten.
Why Rethryv exists
You can look healthy, perform well, and still not be well.
Dr. Matt Walker had finished multiple Ironman races and looked like the definition of health. Then he found he was in metabolic decline. He rebuilt his health with advanced diagnostics and a systems-based approach, then built Rethryv so other people would not have to find out the hard way.
Dr. Matt Walker
Founder & Longevity Expert
Questions, answered
Before you start.
Is the physician review call really free?
Yes. Every blood panel includes a free, live review call with a Rethryv physician. It is not an upsell. It is how we work.
Do I need a membership?
No. There are no memberships. Buy any panel or supplement on its own, and once our supplements launch you can also subscribe to them. The Program is a separate option, by consultation, for people who want everything handled.
Which panel should I start with?
If you want the whole picture, the Full Rethryv Panel tests everything we offer in one draw. If you would rather start focused, the Metabolic Risk Panel covers blood sugar, lipids, inflammation and organ health.
Where do I get my blood drawn?
At an accredited lab near you. We help you pick the most convenient location when we schedule.
How soon do I talk to a physician?
We book your draw and your review call together, usually within one business day. The call is about 10 to 12 days after your draw.
Do I need to fast?
Some panels read most accurately after an 8 to 12 hour fast. We send clear prep instructions when we schedule you.
More on the full FAQ, or get in touch.
The Rethryv Program
Ready for the whole picture?
Six months with one physician-led team. We start with your bloodwork, bring in everything about how you live, build your personalized Longevity Blueprint and guide you through it every day.
- 01Your bloodwork
- 02Your daily data
- 03Your Blueprint
- 04Guided every day
Explore the Program
Starting at $299/mo