What a scale measures and what it cannot tell you

Published 24 October 2026 · REVIVE LAB UAE Research Desk · 5 min read
A scale measures total mass. Dual-energy X-ray absorptiometry and MRI distinguish fat from lean tissue and show that weight lost with incretin-based agents is predominantly fat but includes a lean component, as with other means of weight loss. Body composition for retatrutide was addressed in a substudy rather than the main trial, and the main endpoint remains total weight.

The methods

Dual-energy X-ray absorptiometry passes two X-ray energies through the body and separates fat, lean and bone mass from their differential attenuation. MRI can quantify fat and muscle in specific regions and is the basis of the liver-fat measurement. Bioimpedance estimates composition from electrical resistance and is less precise.

All are proxies with known error, and all distinguish what a scale cannot.

What the class literature shows

Weight lost through incretin-based agents is predominantly fat, with a lean mass component that is proportionally similar to that seen with other weight-loss methods. The proportion varies between studies and with the method used to measure it. This is a class observation and the subject of ongoing work.

It is one reason body-composition substudies accompany large weight-loss trials.

What was reported for retatrutide

The phase 2 obesity trial's primary and key secondary endpoints were total weight. Composition data from a substudy of that trial have been presented; the Nature Medicine substudy addressed liver fat specifically. Statements about retatrutide and lean mass should be traced to the substudy that reported them rather than to the main paper.

Retatrutide is supplied by REVIVE LAB UAE as an investigational research material for laboratory use only, with identity by mass spectrometry and purity by HPLC for the batch. It is not approved for any use anywhere, and no dosing, administration or protocol guidance is provided.

What it costs

FormatStrengthPriceAvailability
Retatrutide Pack20 mgAED 1010In stock

Delivery is AED 40 flat and free on orders over AED 700. Payment is cash on delivery anywhere in the UAE, or USDT (TRC20) in advance, which takes 5% off the order total.

Frequently asked

The methods?

Dual-energy X-ray absorptiometry passes two X-ray energies through the body and separates fat, lean and bone mass from their differential attenuation. MRI can quantify fat and muscle in specific regions and is the basis of the liver-fat measurement. Bioimpedance estimates composition from electrical resistance and is less precise.

Does REVIVE LAB UAE provide dosing guidance?

No. REVIVE LAB UAE supplies research materials and provides no dosing, administration or protocol guidance of any kind. Every product is sold for laboratory research use only and is not for human or veterinary consumption.

How fast is delivery in the UAE?

Stock is held in Dubai. An order confirmed before 4 PM Dubai time is dispatched the same working day, reaching Dubai and Abu Dhabi the same day and the remaining emirates within 24 hours. Delivery is AED 40 flat and free over AED 700.

Retatrutide Pack — in stock, dispatched from Dubai
HPLC-verified, lot certificate on every carton, 24-hour delivery nationwide. Browse the catalogue → All peptides UAE

Related reading

Supplied for laboratory research use only. Not for human or veterinary consumption. REVIVE LAB UAE provides no dosing, administration or protocol guidance.