Weight Loss Isn’t the Same as Fat Loss
Why the composition of lost weight changes the interpretation.
Read the explainer →Short, source-aware explainers that connect scale weight, body composition, clinical evidence and emerging metabolic therapies.
Why the composition of lost weight changes the interpretation.
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Fat, lean mass, water and glycogen require more context than scale weight.
Explore body composition →
Separate changes in fat and lean tissue rather than collapsing them into one number.
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Several compartments can move while the scale reports only total weight.
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Strength, function and lean tissue are related—but they are not interchangeable outcomes.
Explore muscle preservation →
Deficit size, training, protein, measurement and starting composition all matter.
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Protein is one part of the muscle-preservation evidence picture.
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Training provides a distinct muscle-retention signal during energy restriction.
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Separate demonstrated outcomes from assumptions and extrapolation.
Compare evidence →
Mechanisms differ; study context matters when comparing outcomes.
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Population, dose, duration and design shape the percentages.
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A structured way to interrogate metabolic-therapy claims.
Use the comparison framework →
A practical framework for judging how much a claim can support.
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Trial phase changes the level of uncertainty, not just the study label.
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Replication, controls, endpoints, publication and source quality all matter.
Learn the framework →
Ask who was studied, for how long, against what comparator and using which estimand.
Read more carefully →
New mechanisms and combinations are moving through clinical development.
Explore the pipeline →
Mechanistic differentiation is scientifically interesting, but outcome evidence remains the test.
Open the Retatrutide Signal Card →
Reported changes depend on study population, therapy and measurement method.
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A large scale change still needs fat, lean-tissue and function context.
See the body-composition lens →