#1 IN BIOMARKER ACCURACY HSA/FSA
True Body Index
YOUR TBI
78 +2
MUSCLE MASS
+3.2 lbs this month
+
5/5 4.8
Verified members

Finally see what your weight is hiding.

The first body composition scale built for GLP-1 weight loss, midlife recomposition, and longevity. One number. Every morning. Total clarity.

Burn fat, not muscle
Build muscle 3x faster
One score every morning
Reverse your metabolic age
SEE TODAY'S OFFER
Members unlocked the offer this week
60-day
home trial
Free
shipping
Free app
for life
10-year
warranty
Dr. Elena Park, MD
Dr. Elena Park, MD VERIFIED
Longevity Medicine - Stanford
"My patients are losing fat faster while preserving muscle - for the first time, I can show them the data weekly."
BUILT FOR THREE BODIES

Which one is yours?

Pick the path that fits you. Every TBI Pod comes with the protocol for your audience - built by clinicians who treat it.

IF THIS IS YOU
"The scale says I'm winning. But I feel weaker, my clothes fit strangely, and I'm scared I'm losing the wrong thing."
THE TBI POD FOR YOU
Track muscle loss week-by-week

See if your GLP-1 is costing you lean tissue before it costs you strength.

Visceral fat alerts

The dangerous fat your scale and BMI can't see - flagged early.

Metabolic adaptation warning

Know the moment your body fights back so you can adjust calories.

YOUR 3-STEP ROADMAP
1
Week 1. Step on. Set your baseline TBI score.
2
Weeks 2-12. Weekly report flags muscle loss before symptoms hit.
3
Week 12+. Lock in protein and training. Watch TBI climb.
"Lost 32 lbs on a GLP-1. Without TBI, I would have lost the wrong 32."
SARAH M - 47 - GLP-1 VERIFIED
"
The number that mattered wasn't the one I was watching.
CUSTOMER NAME - CITY
THE QUIET CRISIS

Your bathroom scale has been lying to you for years.

You step on. The number is the same. You did everything right this week. The mirror disagrees with the scale. The scale disagrees with how you feel.

-40%

of GLP-1 weight loss is lean muscle. Your scale shows it all as "progress."

BMI

A 200-year-old formula by an astronomer. It can't tell muscle from fat.

6 lbs

of muscle lost on average before symptoms ever show up.

THE TRUE BODY INDEX

One number. Every morning. The whole truth.

Your TBI is a 0-100 daily score, calculated from 45 body signals. Up means winning. Down means course-correct.

YOUR TBI TODAY
78
+2 this week - recomposition
Fat mass22.1% down 1.4
Lean mass61.4% up 2.1
Metabolic age34 yrs down 4
Symmetry96% up 3
INSIDE THE APP

The data is beautiful. The action is clear.

TBI Score
Segmental
Weekly plan

Syncs free with Apple Health, Google Fit, Garmin, Oura, Whoop.

REAL MEMBERS - REAL DATA

Before. After. The numbers don't lie.

WEEK 0
TBI61
Fat28%
Weight187 lb
WEEK 11
TBI74 up
Fat21% down
Weight155 lb
"Down 28 pounds on Mounjaro. My doctor was thrilled with the number on the scale. I wasn't — my arms looked deflated and I was exhausted all the time. Got this scale because a girl on Reddit recommended it. Day one it told me I'd lost almost 9 pounds of muscle in 6 months. My doctor never tested for that. The pharmacy never warned me. Started hitting 30g of protein every meal and lifting little weights twice a week. Eight weeks later my muscle is back up by 2.4 kilos. The drug works better now too — fat loss continued but muscle stopped disappearing. Genuinely think this should come in the GLP-1 starter kit at every clinic."
JW
Jessica W.
Houston, TX
GLP-1
DAY 0
TBI58
Met. age51
DAY 90
TBI81 up
Met. age42 down
"I lift 5 days a week. Have for 4 years. Always felt like my right side was slacking but no trainer, no physio, no InBody scan at my gym ever flagged it. Bought this on a whim. Day one it told me my right arm has 12% less muscle than my left. Twelve. Percent. I've been compensating since a shoulder thing in college and didn't know. Switched to unilateral work for 8 weeks. Just rechecked — down to 4%. The scale paid for itself the first week. Only complaint: app needs a dark mode. That's it."
MT
Marcus T
Austin, TX
MIDLIFE

Individual results vary. Customer data shown with consent.

SIDE BY SIDE

Why TBI changes everything.

DRUGSTORE
COMPETITOR
TBI POD
Body composition
x
check
check
One daily score
x
x
check
Audience-specific protocol
x
x
check
60-day home trial
x
30d
check
DEXA correlation
x
~80%
98%
THE SCIENCE

Lab-grade accuracy. Living room price.

98%
WITHIN +/- 3% OF A DEXA SCAN
Fat mass98%
Lean mass96%
Visceral fat97%
RECOMMENDED BY CLINICIANS

The first body comp scale doctors actually trust.

Dr. Marcus Chen, MD
Dr. Marcus Chen, MD
Endocrinology - NYU Langone
"BMI was always the wrong tool. The TBI score is the most useful patient-facing metric I've seen in twenty years."
Dr. Yara Mendez, MD
Dr. Yara Mendez, MD
Functional Medicine - Mayo Clinic
"My perimenopausal patients finally understand what's happening in their bodies."
"
My TBI went from 58 to 81 in eleven weeks. I finally know what's working.
CUSTOMER NAME - CITY - MIDLIFE
A LETTER FROM THE FOUNDER
D. Aronson

"I built this for my mother."

She lost 60 pounds on a GLP-1. Her doctor was thrilled. Her bone scan wasn't. She'd lost so much muscle she could barely climb stairs at 62. Nobody had told her that 40% of her "weight loss" was the tissue holding her metabolism together.

I spent two years working with engineers, clinicians, and three independent labs to build something different. One daily number. Calibrated for real bodies - including older bodies, female bodies, bodies on GLP-1s.

D. Aronson
FOUNDER - TRUE BODY INDEX
YOUR COMPLETE MEMBERSHIP

Here's the offer you came for.

UNLOCKED - ENDS SOON
EVERYTHING INCLUDED
A $1,494 system, today only $240.
The TBI PodLab-grade BIA hardware
$549
TBI+ App PremiumAll 45 metrics, for life
$240
Free User GuidanceDesigned by user feedback
$40
GLP-1 Muscle ProtocolDesigned by clinicians
$47
Midlife Recomp Plan12-week roadmap
$97
Family sharing - 24 usersEach with their own profile
$99
2-year warrantyFull hardware coverage
$120
Free worldwide express2-day US, 5-day global
$45
60-day home trialRisk-free, no questions
priceless
TOTAL VALUE$1,494
YOU SAVE $1,254 TODAY
OR 4x $94.75 - NO INTEREST - NO HIDDEN FEES
60 DAYS

Two months. Risk-free. Most know by day 10.

If the TBI doesn't change how you see your body, send it back. Full refund. No questions.

VERIFIED REVIEWS

What members are saying.

Jen Misak Jen Misak GLP-1 5/5

Finally know what I'm losing

I'm 48. Perimenopausal. My weight has barely moved in 3 years but my body completely changed and I had no idea why. Doctor told me "this is normal at your age" and didn't help. Bought the TBI in March. First scan showed my muscle mass was 4 kilos below normal for my height and age. That's it. That was the answer the whole time. I wasn't gaining weight. I was losing muscle. Started lifting twice a week. Nothing crazy — 8 and 10 lb dumbbells in my living room. 90 days later muscle is up 2 kilos, metabolic age dropped from 52 to 48. Same weight on the scale the whole time. I wish my doctor had this in her office. Honestly.

David EJ David EJ MIDLIFE 5/5

The scale that finally tells the truth

I was paying $200 every 3 months for an InBody at my gym. Drive there, wait, scan, drive home. Got tired of it. The TBI is basically the same 8-electrode tech sitting in my bathroom and I check it weekly instead of quarterly. The weekly data changed everything. I can actually see what a high-protein week vs a normal week does to my numbers. Couldn't do that with a quarterly snapshot. Setup with the app took maybe 5 minutes. My wife is on it too — she's training for a marathon and tracks her hydration before long runs. Took 3 weeks for me to fully trust the numbers vs my old InBody scans. Now I trust this more.

Frequently asked.

Does the TBI Pod actually work?

60-day home trial means you don't pay if it doesn't work. Add your real proof points here.

Safe on Ozempic / Wegovy / Mounjaro?

Add your answer.

How many users per device?

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HSA / FSA reimbursement?

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Stop guessing. Start knowing.

One number. Every morning. For life.

SEE TODAY'S OFFER
60-DAY TRIAL - FREE SHIPPING - HSA/FSA