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The first brand-neutral app for a medically prescribed low-protein diet.

From your doctor's prescription to a gram-precise meal plan, every low-protein brand in one marketplace, and the community and clinical care that finally make this condition livable — for people with PKU, other metabolic disorders, and late-stage kidney disease.

Built by a PKU patient · for PKU, metabolic disorders & chronic kidney disease
Who are we
The founder
Fanni Herczeg, founder of Fanniceuticals
Fanni Herczeg
PKU patient

European Studies student at Maastricht University, Innovation Fellow at the European Innovation Academy (London), Research Fellow in International Law at EPIS Thinktank, and Chief of Marketing at Kutics Kft — turning lived experience into the first brand-neutral app for a medically prescribed low-protein diet.

Imagine measuring every gram of phenylalanine (an amino acid in proteins) you ever eat.

“I was born with PKU, a metabolic disorder where my liver cannot process an amino acid called phenylalanine, found in protein. It means I can't eat meat, dairy, wheat, eggs, or certain artificial sweeteners. The ordinary foods that bring people together are a genuine risk to a PKU patient's brain development in childhood. For twenty-one years I have carried the anxiety and the relentless daily arithmetic this lifestyle demands — and still, there is no united access to the low-protein products we depend on: they are scattered across dozens of separate brands and shops. The solution simply didn't exist. So I'm building it.”

— Fanni

The solution · one app, end-to-end

Everything the diet demands, in one place.

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Prescription → meal plan

Turns your doctor's prescription into a gram-precise, personalised meal plan.

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One marketplace

Every low-protein brand in one place — compare, order and auto-reorder in seconds.

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A community that gets it

Connect with patients, parents and carers who live the same reality — locally and worldwide.

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Care, built in

Your dietitian and clinic, integrated — book, message and stay monitored in-app.

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Track with confidence

Log intake and blood levels, with gentle reminders so nothing slips.

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Made for real life

Designed with lived experience, so the hardest diet in the world finally feels manageable.

From prescription  →  to plate  →  to care.

Who it's for

A lifelong, underserved community.

Millions of people worldwide depend on a restricted-protein diet — and no one has built the brand-neutral, end-to-end platform we deserve.

PKU (phenylketonuria) MSUD Urea cycle disorders Organic acidemias Late-stage chronic kidney disease
Early access

Be first to use Fanniceuticals.

Join the waitlist, or reach out about partnership, investment or collaboration — one form, we'll route it to the right place.

No spam, ever. We'll only email you about early access and updates.