A big bowl of three bean chilli is one of the most satisfying, warming and nutritious dinners you can make, and it happens to be a fibre superstar. Three kinds of beans simmered in a rich, smoky tomato sauce deliver a remarkable 15g of fibre and 18g of plant protein for around 380 calories. It is cheap, freezes beautifully, feeds a crowd, and is exactly the kind of hearty meat-free dinner a GLP-1 gut loves.
A quick word first: I am not a doctor or a dietitian, just someone who lived this. None of these foods or supplements are medication, and if you are on a GLP-1, check anything new with your GP or pharmacist. Right, let us get to it.
For why fibre matters so much on the jab, see fibre on GLP-1, and for the full plan, my complete GLP-1 guide.
Why a bean chilli is a GLP-1 superstar
This unassuming pot of beans is one of the most nutritionally useful dinners going.
15g of fibre in one bowl. Three kinds of beans make this the single highest-fibre dinner in the series — a genuine gift for GLP-1 digestion, which so often struggles.
18g of plant protein. Beans bring a solid protein hit alongside all that fibre, so this is genuinely filling and satisfying, not just a bowl of carbs.
Cheap, hearty and freezer-friendly. A big pot costs next to nothing, tastes even better the next day, and freezes perfectly — the definition of a sustainable staple.
Beans: the most underrated food on a GLP-1
If I could get anyone starting out on a GLP-1 to eat more of one thing, it would be beans. They are, quietly, one of the most useful foods you can build your diet around, and they are absurdly cheap. Beans bring together the two things a GLP-1 diet most needs and most often lacks: protein and fibre. When you eat far less overall, both of these tend to fall short — protein because you struggle to eat enough, and fibre because it vanishes when your portions shrink. A tin of beans, costing pennies, delivers a solid hit of both at once, which is a genuinely rare and valuable combination in a single ingredient.
This three bean chilli is beans at their best. Fifteen grams of fibre in one bowl is an enormous contribution to a day when fibre is otherwise hard to hit, and it does more for the constipation so common on the jab than any supplement. The one thing to know, as with any high-fibre food, is to build up gradually and drink plenty of water, because a sudden jump in fibre can cause bloating and wind for a few days while your gut adjusts. Brought in sensibly, though, beans are transformative. Keep your cupboard stocked with tins of black, kidney and cannellini beans, chickpeas and lentils, and you always have the makings of a cheap, filling, protein-and-fibre-rich meal. On a GLP-1, that is genuinely one of the smartest, most affordable habits you can build.
The macros that matter
Here is roughly what one serving gives you. Treat these as a guide rather than gospel, since it depends on your exact ingredients and portions:
| Approx per serving | Amount |
|---|---|
| Calories | ~380 kcal |
| Protein | 18g |
| Carbohydrate | 50g |
| Fat | 8g |
| Fibre | 15g |
The protein figure is the one I watch on a GLP-1. As a rough guide I aim for somewhere around 1.2 to 1.6g of protein per kilo of body weight across the day to protect muscle while losing fat, and I judge every meal by how much of that it contributes. I log meals like this in Cronometer (it is free) so I know I am actually hitting my targets rather than hoping. The first time I tracked properly I realised I was eating far less protein than I thought, so if you have never done it, give it two weeks.
What you need (serves 1)
- 1 tin kidney beans, drained
- 1 tin black beans, drained
- 1 tin cannellini or pinto beans, drained
- 1 onion, chopped
- 1 red pepper, diced
- 2 cloves garlic, crushed
- 1 tsp smoked paprika
- 1 tsp ground cumin
- ½ tsp chilli powder
- 1 tin chopped tomatoes
- 1 tbsp tomato puree
- 1 tsp olive oil
- Fresh coriander and a squeeze of lime
- To serve: rice, or a jacket sweet potato
How to make it
- Heat the olive oil in a large pot and soften the onion and pepper for a few minutes.
- Add the garlic and all the spices and cook for a minute until fragrant.
- Stir in the tomato puree and cook for another minute to deepen the flavour.
- Add the chopped tomatoes and all three tins of drained beans.
- Bring to a simmer and cook gently for 20–25 minutes, stirring now and then, until rich and thick.
- Season well, finish with a squeeze of lime and plenty of fresh coriander.
- Serve over rice, with a jacket sweet potato, or in a bowl topped with avocado and yoghurt.
Adjusting it to your goals
This is a fibre and plant-protein powerhouse, and flexible:
Add extra protein. A dollop of Greek yoghurt, some grated cheese, or lean mince or turkey for a non-veggie version.
Lower the carbs. Serve over cauliflower rice or a pile of veg instead of rice.
Add more veg. Sweetcorn, courgette or extra peppers add volume and nutrients. See fibre on GLP-1.
Building fibre up gently to avoid the bloat
Fibre is genuinely brilliant for you, and dishes like this three bean chilli are a fantastic way to get more of it, but there is an important caveat worth understanding, especially on a GLP-1. If your fibre intake has been low — which it often is when you are eating smaller portions — suddenly eating a bowl with 15g of fibre in it can leave you bloated, gassy and uncomfortable for a few days. This is not the fibre doing you harm; it is simply your gut and its bacteria adjusting to the increase, and it settles down. But it can be off-putting if you do not know to expect it. The way to avoid the worst of it is to increase your fibre gradually rather than all at once. If you have been eating very little, start with a smaller portion of a dish like this, or have it a couple of times a week rather than daily, and build up over a week or two as your system adapts. Just as importantly, drink plenty of water, because fibre needs fluid to do its job properly — too much fibre without enough water can actually make constipation worse, which is the opposite of what you want. Get the balance right, build up sensibly, and stay well hydrated, and beans and other high-fibre foods become one of the best things you can do for your digestion and your fullness on a GLP-1, without the uncomfortable side effects. Patience and water are the two keys.
A batch-cook and freezer champion
Bean chilli is one of the very best things to batch-cook. It costs almost nothing to make a huge pot, it tastes even better after a day or two as the flavours deepen, and it freezes perfectly in portions. I always keep some in the freezer for a quick, nourishing, high-fibre dinner or a warming next-day high-protein lunch. A cornerstone of my meal prep ideas for Mounjaro and one of my best tools against GLP-1 constipation.
How it fits a full day of eating
At 18g of protein and a remarkable 15g of fibre, this bowl does an enormous amount of the day’s fibre work in one go. It is a touch lighter on protein than a big meat dish, so I make sure the rest of my day carries more — a solid high-protein breakfasts and high-protein lunch.
Add yoghurt, cheese or lean mince and it climbs higher on protein, and a protein shake covers any gap. With this much fibre, plenty of water is essential — see my constipation on GLP-1 guide. As always, it is the daily total that counts. My complete GLP-1 guide explains how I balance it.
No appetite today?
Warm, rich and comforting, a small bowl of chilli is manageable on a low-appetite evening and delivers real protein and fibre, and the smoky spice can help wake up an appetite. Given the fibre, keep the portion modest on an off day. When cooking is beyond you, a freezer portion or HelloFresh keeps proper meals coming. More in what to eat with no appetite.
Supplements that pair well
This is the highest-fibre dinner in the series, so a probiotic like Pre + Pro 15 is a natural partner, and plenty of water is a must. As a plant-based meal it is low in omega-3, so I add Super Omega-3 EPA. My gut health supplements guide goes deeper on digestion, and the free Lily & Loaf lifestyle analysis matches a routine to your goals.
Frequently asked questions
Is a bean chilli good for weight loss?
Excellent — beans bring protein and fibre together, which keep you full and support digestion, all for very few calories and pennies a portion. At 18g of protein and 15g of fibre, it is one of the most satisfying, nutritious dinners going.
Will it help with GLP-1 constipation?
It genuinely can — 15g of fibre is a serious contribution. Build your fibre up gradually and drink plenty of water alongside it, and regular bean dishes do more for sluggish digestion than most supplements.
How do I avoid getting bloated from the beans?
Build up gradually rather than jumping straight to a big bowl, drink plenty of water, and rinse the tinned beans well. Your gut adjusts over a week or two; the bloating is temporary as your system adapts.
Can I add meat?
Yes — brown some lean beef or turkey mince and add it for a meat version with even more protein. The three beans still give you the fibre; the mince just boosts the protein further.
Does it freeze well?
Brilliantly — it is one of the best freezer meals and tastes even better after a day or two. Make a big batch and portion it for easy, high-fibre dinners and lunches all month.
The bottom line
Three bean chilli is a fibre superstar and a GLP-1 gut’s best friend — a remarkable 15g of fibre and 18g of plant protein in a hearty, smoky bowl for around 380 calories. Beans are the most underrated food on a GLP-1, delivering protein and fibre together for pennies. Build your fibre up gradually, drink plenty of water, and batch it for the freezer. To match your supplements to a high-fibre routine, the free Lily & Loaf lifestyle analysis is a quick, no-pressure check.
The tools I lean on
If you are putting a GLP-1 routine together, this is the order I would do it in, free tools first:
- Track a fortnight of food in Cronometer so you can see your real protein and calories.
- Take the free Lily & Loaf lifestyle analysis to find the supplements actually worth buying.
- Start an Audible trial for something to listen to while you cook or walk.
- Keep HelloFresh on standby for the weeks cooking from scratch just is not happening.
- Batch-cook and freeze portions in a set of freezer-safe containers so there is always a healthy dinner a few minutes away.
A bit about me
I am Alan Spicer. I lost around seven stone on Mounjaro and filmed the whole thing, warts and all, on my YouTube channel. Simple, protein-first dinners like this were a real part of how I held onto muscle and kept the weight off.
This article shares my personal experience and general information only. It is not medical advice. Food and supplements support a balanced diet and healthy lifestyle and do not replace it or any treatment prescribed by your doctor. Speak to your GP or pharmacist before making changes, especially while on a GLP-1 medication. Nutrition figures are approximate and will vary with the exact ingredients and brands you use.
Inspired by the kind of fresh, wholefood dinners in the Lily & Loaf evening meals collection. This is my own version, written from my own kitchen.
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