A 90-second story by ParrotPal

The Wrong
Number.

Everyone celebrates the number on the scale.
This is the number it hides.

Scroll

You start losing weight. It's working.

The compliments start. The clothes fit.

Every morning, the number is better.

86.0 kg
The number everyone watches
Muscle

The number nobody watches

While the scale falls,
this is draining too.

100%

Up to 40% of the weight lost on aggressive diets and GLP-1s isn't fat at all. It's muscle — the engine of your strength, your metabolism, your independence.

81.2 kg
still falling · still applauded

What muscle quietly pays for

Strength isn't vanity.
It's function.

🫙

The jar lid

Grip strength is one of the strongest predictors of healthy ageing — and one of the first things lean-mass loss takes.

🪜

The stairs

Leg strength decides whether stairs are a detail or a decision. Muscle lost in a diet is strength you climb without.

🪑

The chair

Rising without using your arms — clinicians literally test this. It quietly depends on the muscle you keep.

Each crash diet can cost ~1.5kg of muscle —
roughly a decade of ageing, on fast-forward.

Play it forward

45
years old
80%of lost weight is regained within 5 years — and it returns as fat, not muscle
2.5×higher disability risk with sarcopenic obesity — same weight, more fat, less muscle
↓every repeat of the cycle starts from less muscle than the last

Same weight loss.
Different body.

−12 kg

Without protection

Fat and muscle gone together. Lighter — and weaker, hungrier, frailer.

−12 kg

With protection

Protein held. Training kept. The fat went — the muscle stayed.

The right number

The scale couldn't see the difference.
The score can.

0LeanShield™ Score

The LeanShield™ Score is a live 1–100 measure of how well you're protecting your muscle while you lose fat — built from your protein, your training and your rate of loss. Capture → Score → Nudge → Act. That's the Loop.

Get your score — free trial For clinics & partners →

An illustrative journey, not a prediction or medical advice. Population-level research: up to 40% of weight lost on GLP-1 medications can be lean mass; ~80% of lost weight is typically regained within 5 years; sarcopenic obesity carries ~2.5× disability risk. See the science — and the Cambridge RCT we're funding that could prove us wrong. That's the point.