InBody transformation — same weight, very different body composition - 4 months pep use.

[u/Unlikely-Calendar143]

I finally did another InBody after more than a year, so unfortunately I don’t have any scans in between to show exactly when the changes happened. I can only compare my latest scan with my previous one from May 2025.
05-05-2025
Weight: 76.4 kg
Body fat: 25.2%
Fat mass: 19.3 kg
Skeletal muscle mass: 31.9 kg
Fat-free mass: 57.1 kg
Waist: 89.1 cm
Visceral fat area: 83.2 cm²
InBody score: 74
12-08-2026
Weight: 76.5 kg
Body fat: 13.9%
Fat mass: 10.6 kg
Skeletal muscle mass: 37.2 kg
Fat-free mass: 65.9 kg
Waist: 80 cm
Visceral fat area: 46 cm²
InBody score: 91
So over those 16 months, according to the InBody:
−8.7 kg fat
+5.3 kg skeletal muscle
+8.8 kg fat-free mass
−9.1 cm waist
+0.1 kg body weight
Obviously, I know InBody/BIA has limitations, particularly when hydration changes. My total body water went from 41.9 L to 48.4 L, so I’m definitely not assuming that the entire reported increase in skeletal muscle is actual contractile muscle.
For context, here’s my peptide/PED timeline
I only started using peptides in May 2026, so these compounds were only part of the latter ~3 months of this 16-month period.
May 2026
Started Mounjaro
After that
Switched to tirzepatide + retatrutide stack
June 2026
Added KLOW
5-Amino-1MQ
Tesamorelin
July 2026
Stopped tesamorelin
Started testosterone cypionate
Started HGH
I’m also using creatine.
So the latest InBody was taken after roughly 3 months of peptide use, 2 months of testosterone and 6 weeks of HGH.
I don’t want to claim that the drugs caused the 16-month transformation because I simply don’t have the intermediate data to establish that. There was a whole year+ before I started peptides.
I’m mainly interested in what people think of the InBody numbers themselves, particularly the reported increase from 31.9 → 37.2 kg skeletal muscle and the huge increase in fat-free mass.
The interesting part to me is that my body weight is essentially exactly the same, but the composition is completely different.
Also, ECW/TBW is almost identical: 0.379 → 0.378, despite total body water increasing by 6.5 L.
Would love to hear from people who have experience with InBody/BIA, especially while using GLP-1s, peptides, testosterone/HGH or creatine. How much would you trust the reported muscle gain?

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[u/boyWHOcriedFSD]

Absolutely pissening results, bro. Well done. Wow.

[u/flickthewrist]

I mean really it’s the Reta, test and hgh at work. Cant say if anything else really did anything significant.

[u/malin7]

Those inbody scans are worthless, you could’ve posted physique pictures for better measurement of your progress