Your pediatrician checks if they're sick.We check if they're thriving.

Blood work for ages 10–18, interpreted for how your child is actually developing — not compared against adult norms. Reviewed by a pediatrician with a clear plan for what to do next.

Ages 10–18 Tested for their stage Pediatrician reviewed HSA/FSA eligible

Join the waitlist

Be first in line when Grow launches. Founding members lock in $399/yr.

Free to join · No commitment

Who is Grow for?

You know something's off. You just can't prove it yet.

You've asked your pediatrician. They said "it's just puberty." Maybe it is — but you deserve more than a guess.

"She's exhausted all the time."

Low iron is the most common missed cause of childhood fatigue — and it won't show up on a standard blood count until it's severe. The right test catches it early, when a simple supplement can fix it.

"He's shorter than everyone in his class."

Is it a late bloom or something worth investigating? Growth hormone markers and tracking over time give you a real answer — no 6-month wait for a specialist.

"She trains 15 hours a week and keeps getting injured."

Young athletes deplete iron faster, recover slower, and often don't eat enough to keep up with training. The right blood work shows exactly what's running low before the next stress fracture.

"I do proactive testing for myself. Why can't I get it for my child?"

Adult testing platforms don't work for children. The reference ranges are wrong, the interpretation misses how puberty changes everything, and most can't even order labs for minors. We built this for ages 10–18.

What you catch now is what you can actually fix.

Adolescence is the one window where small changes make a lasting difference — better sleep, the right supplement, catching a thyroid issue early. After they're grown, you can only manage. Right now, you can still shape the trajectory.

The problem

A 15-minute checkup can't catch this.

Your pediatrician checks if something is wrong. They rarely have time to check if everything is right. Here's what falls through the cracks.

The tired child with "normal" labs

Iron stores can run on empty long before a standard blood count catches it. Your child's labs say "fine" — but they can't focus, can't keep up, and nobody knows why.

The thyroid that's "technically fine"

A borderline thyroid result gets filed as normal. But for a growing child, "borderline" can mean brain fog, weight gain, and exhaustion — and without context, no one looks twice.

The slow burn nobody tests for

Insulin resistance shows up years before blood sugar goes abnormal. Most children never get tested. By the time it's obvious, you've lost the window where diet and exercise alone can fix it.

What you get

The right tests. Interpreted for a growing child.

Every child gets a comprehensive blood panel. Based on their health profile, we add targeted testing for growth, athletics, or mood. You're testing what matters for your child — not running the same panel on everyone.

Comprehensive blood work

Iron, thyroid, metabolic health, vitamin D, lipids, liver function, and more — everything a thorough pediatrician would order if they had 60 minutes instead of 15. One draw, twice a year.

Testing personalized to your child

A health questionnaire at sign-up identifies what your child needs — growth hormone markers, athletic recovery panels, or fatigue workup. No two reports look the same.

Interpreted for their age, not yours

The same iron level means something completely different in a 14-year-old swimmer than in a 40-year-old adult. We factor in age, sex, growth rate, activity level, and family history — nothing gets filed as "normal" without the full picture.

A pediatrician reviews everything

A pediatrician in our network reviews and signs off on every result before you see it — not an algorithm alone. A physician who understands what these numbers mean for a growing child.

A plan, not just a printout

What to supplement, what to change, and when to see a specialist — clear recommendations you can act on, not a PDF of numbers with no context.

Track changes over time

Retest every 6 months and see how your child's health is trending. Spot improvements, flag new issues early, and build a health record that follows them into adulthood.

Personalized testing

Not every child needs the same tests.

When you sign up, we ask about your child's growth, activity, sleep, and mood. Based on their profile, we add the panels that matter most for them.

Growth

Height or growth concerns

Growth hormone markers that show whether your child is tracking normally — no months-long wait for a specialist.

  • IGF-1
  • IGFBP-3

Puberty

Early or late development

Hormone levels that clarify whether puberty is starting too early, too late, or progressing normally.

  • Thyroid panel
  • IGF-1

Athlete

Competitive training 10+ hrs/wk

Spot iron depletion, overtraining, and under-fueling before they lead to injuries or burnout.

  • Ferritin
  • CK
  • RED-S screen

Mood + Fatigue

Energy, sleep, or mood issues

Nutritional deficiencies that mimic depression and chronic fatigue — fixable once you find them.

  • B12
  • Ferritin
  • Vitamin D

"Normal" doesn't mean the same thing at 14 as it does at 40.

Most lab results get compared against adult ranges. But a growing child isn't a small adult — an iron level that's fine for you might be why your daughter can't get through practice. We interpret every result for where your child actually is in development.

Nothing like this exists for children today.

Right now your options are a rushed checkup, an adult testing platform that doesn't work for children, or a 6-month wait for a specialist. We built the thing that should already exist.

Annual checkup 15-minute visit, minimal labs, adult reference ranges
Function / Superpower Adults only — can't order for minors, uses adult reference ranges
Pediatric endocrinologist 3–6 month wait, insurance-gated, problem-focused — not preventive
Grow Comprehensive testing personalized to your child, interpreted for their age, pediatrician reviewed — twice a year
How it works

Sign up. Test. Know.

1

Tell us about your child

Answer questions about their growth, activity, sleep, and mood. We use this to personalize which tests they get.

2

One blood draw

Visit a lab near you (2,000+ locations). One or two tubes, around 10 minutes. We send numbing cream in the welcome kit.

3

We interpret the results

We read every result in context — your child's age, stage, and health profile. A pediatrician reviews everything before you see it.

4

You get answers and a plan

Clear results, specific recommendations, and what to do next. Retest in 6 months to track what's changed.

Pricing

$399/yr for founding members.

Everything included — blood work, personalized testing, pediatrician review, action plan, and a dashboard to track it all. HSA/FSA eligible.

FAQ

Questions

How is this different from my child's annual checkup?
A checkup looks for problems. We look at the full picture — more comprehensive blood work, personalized to your child's situation, and interpreted against age-appropriate ranges instead of adult norms.
What does the blood work cover?
Iron, thyroid, metabolic health, vitamin D, cholesterol, liver function, and more — everything a thorough pediatrician would want to see. Based on your child's health profile, we add targeted panels for growth, puberty, athletics, or mood. One or two tubes, one visit.
How does the personalized testing work?
When you sign up, you answer questions about your child's growth, activity, sleep, diet, mood, and family history. A competitive athlete gets different testing than a child with fatigue concerns — and the panels may change between visits as your child grows.
What does the blood draw involve?
A single draw at a Quest or Labcorp near you (2,000+ locations). One or two tubes, around 10 minutes. Your child will need to fast beforehand. We include numbing cream in the welcome kit.
How are the results different from what I'd see on a lab portal?
Most lab portals compare your child's numbers against adult ranges and leave it at that. We factor in their age, how fast they're growing, how active they are, and what's going on in their life — the same iron level can be fine for one child and a problem for another. A pediatrician reviews everything before it reaches you.
Does this replace our pediatrician?
No — it gives your pediatrician better information to work with. Think of it as the thorough screening they'd run if they had an hour instead of 15 minutes. When something needs attention, you'll know exactly what to bring up at your next visit.
Can I use my HSA or FSA?
Yes. Preventive testing for a dependent qualifies under most health savings account (HSA) and flexible spending account (FSA) plans. We provide an itemized receipt.
What if everything comes back normal?
That's great news — and still valuable. You now have a baseline to compare against as your child grows. When you retest in 6 months, you'll see how things are trending and whether anything has shifted.

Know how they're really doing.

Founding members lock in $399/yr — 33% off the launch price. We'll reach out when spots open.

Free to join · No commitment