A complete daily structure — not just a product.

Nupo Diet is a Total Diet Replacement programme. That means instead of deciding what to eat at every meal, you follow a structured plan of portion-controlled, nutritionally complete meals — clinically tested, no added sugar, designed to deliver everything your body needs at a significantly reduced calorie intake.

On GLP-1 medication, this matters more than usual. Your appetite is suppressed, your portions are small, and the risk of under-eating protein and key nutrients is real. Nupo Diet removes the daily guesswork entirely — each portion is already balanced, already portioned, already right.

You don't have to figure out if you're eating enough. That part is done.

See the full programme
Taster Pack Diet

Not sure where to start? Try the flavours first.

The Diet Taste Selection gives you 18 different Diet products to try — an easy way to discover which flavours work for you before committing to a full programme.

Each portion is nutritionally complete: protein, fibre, vitamins and minerals in a small, structured meal. The same clinically tested formula as the full programme — just the perfect starting point.


✔ 18 flavours to explore
✔ No added sugar
✔ Clinically tested TDR programme
✔ The lowest-commitment way to start

Taster Pack Diet

£25.99
Start your journey!

Why structure matters more on GLP-1 than at any other time.

On GLP-1 medication, most people naturally eat less — sometimes dramatically less. That's the point. But when appetite disappears, so does the instinct to make thoughtful food choices. You eat whatever requires the least effort, and protein is almost always the first thing to go.

A 2026 study presented at the European Congress on Obesity found that people on GLP-1 medications average just 54 grams of protein per day — less than half of what most need to protect muscle during weight loss.

Nupo Diet solves this without requiring you to think about it. Every portion is already structured around your protein and fibre needs. On a day when you can barely eat, one Diet shake is still a complete portion.

How to use Nupo Diet alongside your medication.

✔ On GLP-1? Replace 3–5 meals per day with Nupo Diet portions — complete nutrition in controlled portions your suppressed appetite can manage. No cooking, no decisions, no risk of under-eating.

✔ On difficult days? Diet shakes are cold, quick and low-effort. They go down when almost nothing else does.

✔ On better days? Stick to Diet portions as your base and add a small regular meal if appetite allows. The programme flexes with you.

✔ Finishing treatment? Continue with Nupo Diet during the transition phase. Appetite returns gradually — having a structured programme in place means you're never starting from zero.

Start with a taster pack

Explore our range of products and flavours

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Prefer flexibility over structure? One Meal might be the better fit.

Nupo Diet is a complete daily programme. If you'd rather replace one or two meals at a time — without following a full structure — One Meal gives you the same complete nutrition in a single portion

Same protein. Same fibre. Same vitamins and minerals. Just more flexibility in how you use it.

1 One Meal = 1 complete meal. No programme required.

See all One Meals

GLP-1 slows digestion. Fibre helps keep it moving.

One of the most common — and least talked about — side effects of GLP-1 medication is constipation. Slower gastric emptying means slower digestion throughout, and when you're also eating less fibre than usual, the problem compounds.

Premium Fibre is 100% water-soluble fibre from guar beans (Sunfiber® PHGG). It dissolves completely in food and drinks without changing taste or texture — meaning you can add it to a Diet shake, a glass of water, or anything else without noticing it's there.

Free from gluten, lactose, sweeteners and unnecessary additives. Suitable for vegans. A simple daily addition that keeps your gut moving while your diet is structured around smaller portions.

Get your fibre

How do I get enough nutrients if I’m eating much less than before?

When appetite decreases, meals often become smaller. Nupo Diet is designed specifically for this: a complete daily structure of portion-controlled meals with protein, fibre, and a full range of vitamins and minerals — making it possible to eat less while still meeting your body's nutritional needs.

Is it normal to have low energy when eating less?

Reduced energy can occur when your nutritional needs aren't fully met. Nupo Diet's structured portions help support more stable energy levels by providing a balanced combination of protein, fibre and essential vitamins — even on a significantly reduced calorie intake.

Does GLP-1 increase the risk of constipation?

Yes — GLP-1 slows intestinal movement, which means digestion takes longer and constipation is a common side effect. Eating less fibre than usual (which happens naturally when appetite is suppressed) makes it worse. Nupo Diet portions contain fibre to support digestive function, and adding Premium Fibre to your daily routine is a simple way to increase your intake without changing your eating habits.

Can you lose muscle mass while taking GLP-1?

Yes, it can — especially if protein intake is too low. Reduced appetite may mean you’re not getting enough of the building blocks your body needs, which can increase the risk of muscle loss during weight loss.

What is the best “GLP-1-friendly” meal plan?

A structured plan of 3–5 small, nutritionally complete meals per day — covering protein, fibre, vitamins and minerals even on a significantly reduced calorie intake. Nupo Diet is designed specifically for this: each portion is clinically tested, portion-controlled and nutritionally complete, removing the daily decisions that become difficult when appetite is low.

Do you need to continue GLP-1 to maintain weight loss?

Often, yes. The effect typically decreases once treatment stops, and some people may regain weight if sustainable eating habits and routines have not been established.


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