Muscle-protection infrastructure for the GLP-1 weight-loss era

The first platform built around a real-time muscle-protection score.

Lose fat and you burn muscle too. We're the platform that stops it — a consumer app and data lab, and the LeanShield™ API behind the clinics.

4.7 App Store rating · 700,000+ users
1,000,000+users across our brands
13.3M+items logged
4.7★App Store rating
CambridgeClinical RCT in design
The GLP-1 paradox

The drug turns off hunger.
Something has to protect your muscle.

GLP-1 medications make it effortless to eat less — but eat too little, without enough protein and training, and your body burns muscle alongside fat. That's how people end up lighter, but weaker and metabolically worse off.

40%

Up to 40% of the weight lost on GLP-1 medications can be lean muscle — not fat.

It's not just GLP-1

Yo-yo dieting does the same damage.

Lose weight, regain it, go more extreme, regain it again. Every cycle you lose fat and muscle — but you mostly regain the fat, not the muscle. Over time you can weigh the same yet carry more fat and less muscle than when you started. Clinicians call it sarcopenic obesity — the "skinny-fat" trap.

80%

of people who lose weight regain it within 5 years — because they lost muscle along with the fat.

2.5×

higher disability risk for those who slide into sarcopenic obesity.

1.5kg

of muscle lost every diet — roughly what a decade of getting older does.

On a GLP-1 or not, the rule is the same: protect your muscle while you lose fat. It's the strongest predictor that the weight stays off — and that you stay strong, not frail, as you age. Muscle is the currency of health.

Why it works

This is The LeanShield™ Loop.

Knowing what to do was never the hard part — doing it, every day, is. So we built a loop that does the thinking and hands you one move at a time. Run it daily and protecting your muscle stops being a project. It becomes a habit.

01

Capture

You talk.

Tell ParrotPal what you ate and did — by voice, photo or text. No forms. Five seconds.

02

Score

It scores your muscle.

LeanShield™ turns it into a live 1–100 score — exactly how well you're protecting muscle right now.

03

Nudge

Your next move.

Not a data dump. One move: more protein, an 11-minute workout, ease the deficit. The 20% that matters.

04

Act

You do it.

You make the one move. The loop comes round again — and your score climbs.

…and repeat

Every loop, your LeanShield Score climbs — out of the danger zone, into protected. That's muscle preserved, fat lost, and a result that finally sticks.

ParrotPal makes it effortless. LeanShield™ makes it safe. The Loop makes it stick.

The same Loop runs in your pocket — and behind your clinic's API.

See the science behind the Score ↓

The engine inside

Meet LeanShield™ — your metabolic safety net

ParrotPal doesn't just show you a calorie goal. It shows you your LeanShield Score — a proprietary 1–100 measure of how well you're protecting your muscle in real time. High score, you're preserving muscle while fat burns. Low score, you're in the catabolic danger zone. It's the clinical buffer between looking frail and looking fit.

  • Trademarked
  • ⚙︎ Patent pending
  • 🔬 Clinical trial · University of Cambridge
01

Protein, defended

LeanShield watches your protein against the threshold your muscle actually needs — and nudges you before you fall short.

02

Deficit, controlled

It catches deficits that are too aggressive — the ones that quietly strip lean mass — and tells you to eat.

03

Training, scored

Resistance training is the strongest muscle-protection signal there is. LeanShield rewards it and shows the payoff.

From the community

The Loop, in their words.

LeanShield is rolling out across ParrotPal now. Verbatim, from our members:

I'd decided I'd not do weights this morning as I had my grandson — but when I saw my score fall by 3, I looked at the training volume distribution, clicked "get workout from AI coach", and it asked if I wanted a home version… it's motivated me to go do some now. This is a game changer.
The Loop, in one morningParrotPal + LeanShield™
Oh wow! Just logged the rest of my day, and yes — my shield score shot up from 57 to 70! Just from a 30-minute dumbbell workout.
57 → 70 in one workoutParrotPal + LeanShield™
Seeing a number that shows some of my weight loss could be muscle is a massive motivator. … Since January I've lost about 20kg, and I dread to think how much of that might've been [muscle]. The best time to start was yesterday — the second best time is today.
The number that got me liftingParrotPal + LeanShield™
I did my workout, then asked what I should do tomorrow — and it told me to REST 🥳 which is also something I struggle with. But I'll do it if my LeanShield coach says so!
It told me to restParrotPal + LeanShield™
It feels like I can do less, more often — I can always find 10–15 minutes. Being able to focus on the area that needs attention in a short session is such a [change] in mindset.
Less, more oftenParrotPal + LeanShield™
I've shot up from 60 to 86 🥳 — and it's going to be as simple as calories, steps, protein, and just asking our LeanShield coach "what workout shall I do today?" That's it!
60 → 86ParrotPal + LeanShield™
Why "ParrotPal"?

The name is the strategy.

Knowing what to do was never the problem — doing it is. So we made it simple enough to actually stick to. The name says it in three parts:

80/20

Pareto

Most apps bury you in data. We obsess over the 20% that drives 80% of your results — calories, protein, and the training that protects your muscle. Track those, ignore the noise.

🦜

Parrot

Parrots talk — so you just talk. Tell it what you ate like you'd text a mate, by voice, photo or a quick message, and it handles the maths, the targets and the coaching.

🤝

Pal

And a pal in your corner — the friendly coach and community that turns up every day and keeps you going.

How it works

Track three things. That's it.

Calories. Protein. Training. The golden trio.

🎯

Custom targets

Tailored to your metrics for safe weight loss & management. No quick fixes, no crash deficits.

💬

Log food with AI

Text it, voice-note it, snap a photo, scan a barcode. Logging is effortless — do it your way, in seconds.

🎙️ Voice📷 Photo⌨️ Text📦 Barcode
📈

Weekly coaching

An AI review algorithm steers you to results with automatic tweaks to your targets — every single week.

Train smarter

Workouts built around you — and your score.

Resistance training is the single biggest lever for protecting muscle. So ParrotPal hands you workouts tailored to you — at home or in the gym, around your equipment, your experience, and any injuries or limitations. Each session tells you exactly what to do, and exactly how much it'll raise your LeanShield Score.

🏠 Home🏋️ Gym🩹 Injury-aware⚙️ Any equipment
You're not doing this alone

Thousands of people, in it together — every day.

Behind the app is a community of thousands who show up daily — sharing wins, asking questions and keeping each other going. You get daily support, live expert talks, and coaching that actually replies. It's the difference between starting and sticking.

💬 Daily community chat 🎓 Live expert talks 🎧 The ParrotPal podcast 🤝 Coaching that replies
Loved by people, all over the world

Don't take our word for it.

Real reviews from real members, verbatim from Trustpilot.

★★★★★
Easy to use, felt supported, scientifically grounded. Did the trial, signed up to the year plan. Have recommended to my friends and renewed.
Gentle and usefulPaula G · Trustpilot
★★★★★
ParrotPal is so much more than a weight loss app. It provides the resources and management tools to help you change your relationship with eating, food, exercise and weight loss.
So much more than a weight-loss appDeborah Hearne · Trustpilot
★★★★★
This app makes losing weight in a slow and sustainable way so easy. It's by far the best and easiest method I've ever used and have lost over 1 stone over the last 13 weeks.
Slow and sustainableJane D · Trustpilot
★★★★★
Wonderful app, it's helping me to stay on track with my weight loss and made me even more mindful about what I'm eating. It has many amazing features and I seem to discover more and more as time goes on. Would definitely recommend!
Wonderful appKelly · Trustpilot
★★★★★
I have previously used MyFitnessPal but ParrotPal is so much more user friendly and makes it easy to record all foods. Great tool to keep an eye on your nutrition.
Great experience using this appVIC W · Trustpilot
★★★★★
A mother of 2 with a full time job, I am always in a rush but the ease of use of the app has supported me to track effectively. Love that you can take a picture of your food and it calculates the nutritional values for you!
Helped a busy mum stay on track!Lisa Daniels · Trustpilot
Recognition

Vetted. Selected. Awarded.

Due-diligenced by some of the most demanding names in UK tech and healthcare.

🏆 Winner AI for Healthcare Resilience Award
🏆 Winner Women in AI
🏆 Winner NextWave
Top 20 Deep-tech Competition
Top 20 Future of Technology
UK Business
Tech Awards
Finalist Healthtech Company of the Year
Selected Emerging Giants Programme
The science

Built with the University of Cambridge

LeanShield's science was developed with Professor Nick Wareham and his team at the University of Cambridge — and a clinical RCT, DXA-measured and in design with Prof Wareham's team, will test whether LeanShield-guided members retain significantly more lean mass.

Prof Wareham is Director of the Cambridge Institute of Metabolic Science — among the world's foremost researchers into the prevention of obesity and type 2 diabetes.

We'd rather prove it than claim it. That's what the RCT is for.

For partners · B2B

Not just an app — a platform.

Behind the app sits ParrotPal Group: three consumer brands — ParrotPal, Turtle Method (our women's-health brand) and GLP Pal (our GLP-1 clinical companion) — all feeding LeanShield™, the patent-pending muscle-safety engine partners license by API: the 1–100 score, the coaching logic, and the behavioural data behind it.

🏥 Clinics & GLP-1 providers 💊 Pharmacies 🏋️ Gyms 🛡️ Insurers 🔌 API & licensing

Explore the partner platform →

Our story

We've been at this since 2019.

It started with Turtle Method — a women's-health community founded in 2019 that grew to over 100,000 customers, built on strength training, honest macro tracking and a fierce anti-diet-culture streak. Fifteen-plus live events and hundreds of hours of expert talks taught us something no dataset could: people don't fail for lack of knowledge. They fail because doing it is hard.

So in 2023, everything those hundred thousand journeys had taught us became a new company. ParrotPal rebuilt tracking around the 20% that actually drives results — as easy as talking — and hit the App Store top 20 within months, growing to 700,000+ users in the broader weight-loss market Turtle was never built for.

And we know the journey from both sides. Jacqui Gilbert found Turtle Method as a member in 2020 and went on to lose over 40kg. Today she's ParrotPal's co-founder — customer first, co-founder second. Nobody here is guessing what our members go through.

Then Professor Nick Wareham of the University of Cambridge changed our direction with one observation: we were all chasing the wrong number. The scale can fall while your health quietly gets worse — because what you lose matters more than what you weigh. GLP-1s have solved eating less. Nobody had solved keeping muscle.

We've spent the year since building the answer: LeanShield™ — developed with Professor Wareham's guidance and oversight throughout, shaped with our community, tested in beta, and now live inside both brands. Today ParrotPal and Turtle Method run as one company tackling two huge markets — the broad weight-loss market, and women's health, especially 40+. Next comes a randomised controlled trial that could just as easily prove us wrong. That's the point. If you're going to call something a muscle-protection score, you fund the science that checks it.

The team

The people building ParrotPal

Founders, operators and scientists who've built and backed category-defining products.

Scott Flear

Founder & CEO

Jacqui Gilbert

Co-founder & CCO

Yuriy Zabolotin

CTO

Advisory board & investors

Prof. Nick Wareham

Lead Scientific Advisor

Director, Cambridge Institute of Metabolic Science

Paul Rimmer, PhD

Nutrition Advisor

Dean Leak

Mindset Advisor

Former Team GB

Peter Hiscocks

Investor, advisor & board member

Joshua Patterson

Investor & strategic advisor

Co-founder, Runna

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