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Dr. Seth Osgood

Founder · DNP, FNP-BC, IFM-CP

Dr. Seth Osgood

Founder · DNP, FNP-BC, IFM-CP
Dr. Seth Osgood, functional medicine clinician and founder of GrassRoots Functional Medicine in West Lebanon, NH
Dr. Seth Osgood, functional medicine clinician and founder of GrassRoots Functional Medicine in West Lebanon, NH
Functional Medicine · West Lebanon, NH

Every doctor says you're fine. You know you're not.

You’re exhausted. You’ve gained weight you can’t lose. Your mood, your sleep, your libido — none of it feels like you anymore. And every lab keeps coming back “normal.” Here’s the truth no one’s told you: normal isn’t optimal, and it’s not the same as healthy. At GrassRoots, we don’t stop at normal. We hunt the actual root cause — until we find it.

Root cause. Real listening. Whole-person transformation.

Institute for Functional Medicine Certified DNP, FNP-BC · functional medicine clinician 10+ years with complex chronic illness Serving the Upper Valley & New England
Advanced functional testing through Genova Diagnostics· Doctor's Data· IGeneX· Vibrant Wellness· US Biotek
Functional Medicine · West Lebanon, NH

If you've been told it's stress, age, or “all in your head” — you're in the right place.

You already know your body. You knew something was wrong long before any lab agreed with you. You’ve sat across from specialist after specialist, watched them glance at a screen, and heard some version of the same line: “Everything looks normal. Try to manage your stress.”

That’s not medicine. That’s a system designed for 15-minute visits, symptom suppression, and a prescription pad — built to silence the signal, not find the source. You were never the problem. The model was.

You don’t need another doctor who shrugs. You need someone who finally looks.

The GrassRoots difference

We don't treat your labs. We find what's driving them.

Conventional medicine waits until your numbers cross a disease threshold, then names the disease and manages it. We work upstream — in the wide gap between “not sick enough to diagnose” and actually thriving — where you’ve been living for years.

Conventional medicine
  • Your labs are “normal.”
  • 15 minutes, then a prescription.
  • Tests only what insurance allows.
  • Treats the symptom.
  • You’re a chart number.
The GrassRoots root-cause model
  • Your labs are optimal — or they’re not, and we tell you why.
  • An 80-minute deep-dive into your full history and biology.
  • Advanced functional labs most clinics never run.
  • Hunts the driver: gut, hormones, inflammation, toxins, stealth infections, mitochondria.
  • You’re a person we care for like family.
Dr. Seth Osgood at the GrassRoots clinic in West Lebanon, NH, with his framed credentials

Why GrassRoots exists

I built this clinic because I was once the patient no one would help.

Years ago, I started having neurological symptoms I couldn’t explain. I went to the specialists. I did the imaging — it showed lesions. I did the testing — my Lyme test came back negative. And one by one, the experts shrugged. “Normal labs.” “We’re not sure.” A system that was supposed to catch me quietly gave up on me.

I wasn’t fine. I was deteriorating, and being told to live with it. It wasn’t until I was tested properly — and finally tested positive through IGeneX — and approached the whole picture through a root-cause, whole-person lens that I got my life back. Not a little better. Back.

So I built the clinic I needed back then — right here in West Lebanon. A place where patients aren’t dismissed. Where the testing is precise, not perfunctory. Where we refuse to choose between conventional rigor and functional depth — and use both.

— Dr. Seth Osgood, DNP, FNP-BC, IFM-CP

Every patient who walks through our doors is the person I once was. We exist so that no one who comes to us ever feels that way again.

What you can expect from us

What it actually feels like to be a GrassRoots patient.

You’ll be cared for like family — not processed like a case number.
We don’t stop at “your labs are normal.” We hunt the actual driver — until we find it.
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From your first minute here, you’re heard, investigated, and taken seriously.
Honest recommendations — only what genuinely helps you. We’ll tell you if we’re not the right fit.
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You get our full attention and our best thinking, every single visit.
A team genuinely obsessed with getting you real answers.
How Adaptation works

Your path from dismissed to finally yourself — in five clear steps.

1

Free Discovery Call (30 min, Zoom)

We learn your story and goals, you ask anything, and together we decide if this is the right fit. No pressure. No pitch.

2

Your 80-minute deep-dive + advanced testing

A full investigation into your history, timeline, and biology — paired with advanced functional labs that go far beyond a standard panel.

3

Your personalized root-cause roadmap

We walk you through every result on a recorded video walkthrough you keep — what it means, what's driving your symptoms, and exactly what we'll do about it.

4

Guided implementation + coaching

Nutrition, lifestyle, targeted supplementation, and — when appropriate — prescription support, implemented with accountability, not handed to you on a sheet and forgotten.

5

Follow-up + optimization

We track your progress, adjust, and keep refining — then transition you into long-term maintenance so your results actually last.

This is the difference between getting information and getting better.

Choose your Adaptation program

Three ways to begin. One goal: getting your life back.

Compare what you get. We’ll walk through your investment, step by step, on your free call — no surprises.

Adaptation
8-month program
  • Up to 6 medical provider visits
  • Up to 4 lifestyle & nutrition visits
  • Complete health history & advanced functional lab testing
  • Video walkthrough of your lab results
  • Personalized supplement + lifestyle plans
  • Patient portal & direct messaging
  • Dedicated care coordinator
  • Prescription management
See if Adaptation fits me
Adaptation Plus
12-month flagship program
Everything in Adaptation, plus:
  • Up to 10 medical provider visits
  • Up to 6 lifestyle & nutrition visits
  • A dedicated health coach (six 30-min sessions)
  • Complimentary PNOĒ Full metabolic assessment (included once)
  • 10% RootFix supplement discount

More access, more accountability, deeper transformation.

Start with Adaptation Plus
Adaptation Membership
Flexible monthly option
  • The full Adaptation program on flexible monthly payments
  • Same root-cause depth, structured to fit your budget
  • Advanced testing, coaching & provider care included
Ask about the membership
Functional Medicine · West Lebanon, NH

Here's what you'll never get from us: a surprise number sprung on a Zoom call.

Adaptation is a premium, root-cause investment in getting your life back — not a quick fix, and not a 15-minute co-pay. We’re upfront about that. We’re also upfront about everything else:

  • Full clarity on your free call. We walk you through exactly what everything involves — step by step, no surprises, no pressure — before you ever decide.
  • Flexible monthly payment options are available.
  • HSA/FSA eligible. We provide superbills for possible reimbursement.
  • Your initial visit deposit applies toward your program — zero wasted investment.
  • Why we don't take insurance: insurance pays for disease management, not root-cause care. That's exactly why we can give you the time, testing, and depth that actually move your health forward.

The most expensive option on the table isn’t our program. It’s another year of being dismissed, exhausted, and not yourself.

Everything included

What you're actually investing in.

Compare what you get. We’ll walk through your investment, step by step, on your free call — no surprises.

  • Advanced functional lab testing most clinics never run
  • An 80-minute provider deep-dive — not a rushed visit
  • A recorded lab-results video walkthrough you keep for life
  • A personalized supplement + lifestyle protocol built for your biology
  • Ongoing provider visits across your program
  • Lifestyle & nutrition coaching
  • A dedicated care coordinator who keeps everything moving
  • Prescription management when clinically appropriate
  • Patient portal + direct messaging access to your team
  • On Adaptation Plus: a dedicated health coach + PNOĒ Full metabolic assessment

This isn’t a stack of appointments. It’s a partnership engineered around one outcome: real answers, and a body that finally works for you again.

Real patients · Real stories

They were dismissed too. Then this happened.

“I never thought I would feel as good as I do now.”
“I will never regret making that phone call.”
“I had no idea what was happening in my body.”
“I feel better than I’ve felt in 20 years.”
“Working with GrassRoots has changed my life drastically.”
“I would truly be lost without Dr. Osgood.”

The real promise

This was never just about your labs.

When the fatigue lifts and the fog clears, here’s what you actually get back: the energy to be present for your kids instead of running on empty. The version of you that shows up fully at work. The person your partner remembers. Yourself.

Better health is the doorway. Becoming more fully yourself is the destination.

We can’t promise a specific outcome — anyone who does is selling something. What we promise is clarity, a real strategy, and a team that won’t quit until we’ve found what’s driving this.
Honest answers

The questions you're actually asking.

I've already spent thousands and tried everything. Why would this be different?
Usually it’s not that what you tried was wrong — it was incomplete. Most plans treat pieces in isolation. We map the whole system and find the driver the piecemeal approach missed.
Isn't this just more labs and supplements?
Labs and supplements are tools, not the cure. Results come from interpretation, implementation, and accountability — that’s the part we’re built around. A protocol you actually follow, with a team making sure it works.
I don't have time for another program.
Most of our patients are overworked and overstretched — that’s exactly why they’re stuck. Adaptation is structured to fit a real life, with your team carrying the coordination so you don’t have to.
You don't take my insurance.
Correct — and it’s deliberate. Insurance pays for disease management, not root-cause care. Refusing those constraints is what lets us give you the time and depth that actually work. HSA/FSA funds apply, and we provide superbills for possible reimbursement.
What if it doesn't work for me?
We won’t promise a guaranteed outcome, and we won’t take you on if we don’t believe we can help. If we’re not the right fit, we’ll tell you honestly on your free call — before you invest anything.

Risk-free first step

Free. 30 minutes. Zero pressure.

This isn’t a sales pitch and it isn’t a medical visit. It’s a conversation — we learn your story, you ask anything you want, and together we figure out whether GrassRoots is the right place for you. If we’re not the right fit, we’ll say so honestly. You have nothing to lose but another year of feeling this way.

You’ve waited long enough

You've been patient long enough. Let's find the answer.

Every day you wait is another day of “normal” labs and a life that doesn’t feel like yours. One call starts the path back — from West Lebanon and across the Upper Valley, Vermont, New Hampshire and beyond.