Is Huel Good for You? What the Evidence Says (UK)

Someone in your office drinks it for lunch every day. Someone else tried it for a fortnight and gave up because their stomach rebelled. So is Huel good for you, or is it just a very well-marketed bag of powder?

The answer depends much less on what's in the bag than on how you use it. And in clinic, the people asking us this question are usually not curious biohackers. They're on a GLP-1 medication, their appetite has dropped off a cliff, and they want to know whether a shake counts as a proper meal.

What Huel actually is

Huel is a British company making powders, bars and ready-to-drink bottles designed to replace a meal rather than top one up. The base is plant food: oats, pea protein, brown rice protein, flaxseed and sunflower seeds, fortified with vitamins and minerals.

That fortification is the point. A standard scoop-and-shake serving is built to cover the micronutrients a meal would normally supply, which is what separates it from a protein shake. Protein powder gives you protein. Huel is trying to give you lunch.

The UK range splits roughly three ways:

Diet Powder is the one worth noticing if weight is the goal. At 200 kcal with 20g of protein, 40% of its calories come from protein, and 5g of fibre comes along with it. That ratio does real work for satiety, and it puts the product closer to a clinical meal replacement than to a milkshake.

Beyond the powders there are ready-to-drink bottles (the Huel Lite range turns up in Tesco), bars, and Complete Protein, which despite the branding is a protein supplement rather than a meal. That last distinction catches people out. If you buy Complete Protein expecting it to stand in for lunch, you'll be short several hundred calories and most of the micronutrients.

Formulations change between versions, so check the pack rather than trusting a number you read in a review from two years ago.

Is Huel good for you? What the research actually found

There is exactly one published study of people living on Huel, and it is worth understanding properly before anyone waves it around.

Researchers at Newcastle recruited 30 adults, 20 of whom completed four weeks on Huel and nothing else. Blood was taken before, during and after. Haemoglobin, iron, vitamin B12, vitamin D and selenium all rose. HbA1c, total cholesterol, non-HDL cholesterol, BMI, waist circumference and visceral fat all fell. Vitamins A and E fell too, along with potassium, though A and E both stayed inside the normal range. The authors concluded that four weeks of Huel alone did not harm micronutrient status.

Encouraging. Also small, short, uncontrolled, and paid for by Huel, with one of the authors employed by the company. The paper says so openly, which is to its credit, but it means the findings are a reasonable starting point rather than a verdict.

What the study does establish is narrower and more useful than "Huel is healthy": if you replace your normal diet with a fortified product for a month, your bloods are unlikely to fall apart. Which, for someone eating badly out of desperation or exhaustion, is not a trivial finding.

What it cannot tell you is what happens at six months, or two years, or whether the person drinking it would have done better learning to cook three meals.

Huel, a protein shake, or a plate of food?

People use these three interchangeably and they are not interchangeable.

A protein shake is a supplement. It gives you amino acids and almost nothing else, which is fine if it's sitting next to a sandwich and a problem if it's replacing one. We've written separately about whether protein shakes help with weight loss, and the short answer there was the same as it is here: useful as an addition, weak as a substitute.

Huel is trying to be the middle column. It mostly succeeds, on paper.

The third column is the one that wins on everything except convenience, and convenience is not a trivial consideration. The bowl of yoghurt takes four minutes and a bit of forward planning. The shake takes thirty seconds and no decisions. On a Tuesday when you've got back-to-back meetings, the thirty-second option is the one that actually gets eaten, and a shake you drink beats a breakfast you skip.

The honest framing is that Huel competes with the meal you'd otherwise have, not with the meal you'd ideally have. Judge it against the service-station sandwich, and it looks good. Judge it against a proper plate of food, and it loses.

The ultra-processed question

Huel is ultra-processed. Oats become oat flour, peas become pea protein isolate, vitamins arrive from a drum. Nobody at Huel disputes this, and the company argues reasonably that processing is not inherently harmful.

The epidemiology is less relaxed. A 2024 umbrella review in the BMJ pooled meta-analyses covering nearly ten million people and found higher ultra-processed food intake associated with 32 different adverse health parameters, including all-cause mortality (risk ratio 1.21) and cardiovascular mortality (risk ratio 1.50). The evidence is observational, so it shows association rather than cause, and the certainty ratings on several outcomes were low.

Here is the problem with applying that straight to Huel: the studies behind those numbers are dominated by crisps, fizzy drinks, packaged cakes and processed meat. Lumping a fortified plant powder in with a sausage roll because both tick the same classification box tells you something about the category and very little about the product.

Still, two concerns survive the caveat.

Fibre quantity versus fibre variety

Huel's fibre numbers look respectable. The sources do not. Most of it arrives from oats and flaxseed, which feed a narrower slice of your gut bacteria than a week of beans, broccoli, berries and brown rice would.

Your microbiome responds to variety, not just grams. Hitting your fibre target from two ingredients is not the same nutritional event as hitting it from fifteen, even when the label reads identically.

The things nobody has put in the powder yet

Fortification covers the nutrients we have named and set reference values for. It does not cover the polyphenols in olive oil, the glucosinolates in kale, the anthocyanins in blackberries, or the long list of plant compounds we have identified but not yet assigned a daily requirement.

The NHS Eatwell Guide asks for at least five portions of a variety of fruit and vegetables a day, and the word variety is doing real work in that sentence. No powder replicates it.

Is Huel good for weight loss?

It can help, and the mechanism is unglamorous. A 200 or 400 kcal serving is a fixed, known quantity. You cannot accidentally eat 900 calories of it the way you can with a meal deal and a flat white, and the protein content keeps you fuller than liquid calories usually manage.

Where it goes wrong is when people treat it as a diet rather than a tool.

Three Diet Powder servings a day puts you at 600 calories. That is not a weight loss plan, it is a total diet replacement, and the NHS only does that under supervision. The NHS Type 2 Diabetes Path to Remission Programme uses soups and shakes at 800 to 900 kcal a day for 12 weeks, with food reintroduction afterwards and a full year of monitoring. Participants lost an average of almost 16kg and a third put their diabetes into remission. It works. It also involves a clinician, a structured exit and your GP adjusting your medication.

Doing a rough version of that on your own, with a bag off the internet, is the part we worry about.

For straightforward weight loss, the NHS suggests aiming for 0.5 to 1kg a week and explicitly warns against losing weight suddenly through dieting. One or two Huel servings slotted into an otherwise normal day gets you there perfectly well.

There's also a satiety question that varies a lot between people. Liquid calories tend to register less convincingly than solid ones. Some people find a shake holds them until dinner; others are rummaging in the biscuit tin by three. If you're in the second group, you've swapped a satisfying 400 kcal meal for an unsatisfying 400 kcal drink plus 300 kcal of biscuits, and the maths has stopped working in your favour. Two weeks of honest observation will tell you which group you're in.

The deeper limitation is that it teaches you nothing. Nobody maintains weight loss on powder forever, and the skills that keep weight off, portioning, shopping, cooking something quickly when you're tired, are exactly the skills a shake lets you skip. If you've read our guide to high-protein, low-calorie foods, you already know most of what Huel is doing can be done with a tin of beans and some Greek yoghurt. It just takes a plate and five minutes.

Using Huel on Mounjaro or Wegovy

Almost nothing useful has been written about this, which is odd, because it's the version of the question we're asked most often.

On a GLP-1 medication, your appetite doesn't politely decrease. It can vanish. Patients routinely tell us they've eaten one slice of toast by four in the afternoon and feel fine about it. The trouble is that two things suffer when intake collapses: protein and micronutrients.

Protein matters more than most people realise here. In the body composition substudy of SURMOUNT-1, which scanned 160 participants at baseline and again at 72 weeks, roughly 75% of the weight lost on tirzepatide was fat and about 25% was lean tissue. The placebo group split almost identically, so this is the ordinary shape of weight loss rather than something the drug does. (That substudy was run by Eli Lilly, who make Mounjaro, which is worth knowing even though the finding is unremarkable.)

Average weight loss in that group was 21.3%. So if you're heading for something like a fifth of your body weight, a real slice of it is muscle unless you're eating enough protein and doing some resistance work.

Which is precisely the gap a high-protein meal replacement fills. On a day when the thought of chicken is unbearable, 20g of protein in 200 kcal of liquid is a far better outcome than nothing. Cold, thin and unflavoured goes down easier than a hot meal when nausea is bad.

Our broader advice on eating while on treatment sits in the Mounjaro diet guide, and the short version applies here too: protein first, fibre second, and whole food wherever you can manage it. A shake is a sensible fallback, not the plan.

Who should be careful

Some people do badly on Huel, and it's usually predictable.

If you have IBS or a sensitive gut, the combination of concentrated fibre, oat flour and pea protein isolate can produce exactly the bloating and loose stools you were trying to avoid. Some of the flavoured products contain sucralose, which bothers a subset of people. Unflavoured versions avoid it.

If you're pregnant or breastfeeding, nutritional needs shift and meal replacement isn't the right tool. If you're under 18, the same applies.

If you take insulin or a sulfonylurea, swapping meals for a fixed-calorie product changes your carbohydrate intake, and that needs a conversation with whoever manages your diabetes before you start rather than after.

If you're already taking a fortified multivitamin, or a stack of individual supplements, check what you're adding up to. Huel is fortified to cover a full day across several servings. Layering a multivitamin on top of two or three servings can push certain fat-soluble vitamins and minerals higher than you intended, and more is not better with vitamin A, selenium or zinc.

If any of your medicines come with absorption instructions, a shake counts as food. Plan it around the tablet rather than the other way round, and ask your pharmacist if you're unsure which of yours are fussy.

And if you have any history of disordered eating, be honest with yourself about what the appeal is. Products that remove decisions about food can be a relief. They can also quietly become a way to stop eating, and a controlled 200 kcal serving makes that easier, not harder. If that rings true, the right next step is a conversation with your GP, not a different powder.

How to use Huel sensibly

If you've decided it earns a place in your week, a few rules keep it on the right side of helpful.

Cap it at one or two servings a day. Beyond that you're drifting towards total diet replacement, which belongs under supervision. One meal replaced reliably beats three replaced for a fortnight before you abandon the whole thing.

Replace the meal you're worst at. For most people that's lunch at a desk or breakfast skipped entirely. Replacing the dinner you'd otherwise cook properly is the wrong swap.

Pick the version that matches what you're trying to do. Diet Powder for calorie control, Black Edition if you want protein and lower carbohydrate, standard Powder for a full meal. Our weight loss supplements guide covers how to read these labels without being sold to.

Build the rest of the day around variety. If breakfast came from a shaker, lunch and dinner need colour: vegetables, pulses, oily fish, olive oil, something fermented. The shake has the vitamins covered. It has not covered the plant compounds nobody has bottled yet.

Start with half a serving if your gut is sensitive, and give it a fortnight. If bloating and loose stools persist past that, the product isn't right for you, and pushing through is not a strategy.

And if you're reaching for it because you've stopped being hungry rather than because you're short of time, say so to whoever is prescribing for you. Appetite that has dropped away completely is useful information for the person managing your dose, and it sometimes means slowing a titration rather than pushing on. There's more on what to expect in the early weeks in our guide to how long GLP-1s take to start working.

This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional before starting any treatment.