This is a collaborative post
Anyone starting a GLP-1 weight loss medication hears the same warning from their GP or pharmacist: these drugs slow digestion and cut appetite so much that getting enough vitamins and minerals from food alone gets harder. That’s led a wave of UK shoppers toward micronutrient supplements built specifically for people on or coming off weight loss injections, alongside the older, more established world of meal replacement shakes and structured diet programmes.
These aren’t the same category, even though they get shopped side by side. Some products replace a meal. Others top up nutrients you might be missing. A few are full coaching programmes with food and support built in. Knowing which is which matters before you add anything to a basket.
Here are six brands worth knowing about if you’re weighing up your options in 2026.
Best for GLP-1 Nutrient Support – Aluna by Shake That Weight
Aluna by Shake That Weight comes from a brand with over half a million customers behind its meal replacement shakes, meals and bars. Those core products are built around a balanced macronutrient profile with high protein and more than 20 vitamins and minerals, priced from £1.85 per meal.
Aluna itself is a UK-made daily capsule formulated for people using or coming off GLP-1 weight loss medication. Each serving delivers chromium, which contributes to normal macronutrient metabolism and helps maintain normal blood glucose levels, alongside B-vitamins that contribute to reducing tiredness and fatigue. The formula also includes vitamin D, iron, zinc, iodine, and magnesium glycinate, a form of magnesium chosen for how well the body absorbs it.
Best for Nutritionally Complete Meals – Huel
Huel has built its name on being nutritionally complete food, and the brand states its products provide all 26 essential vitamins and minerals alongside protein, essential fats, carbs, fibre and phytonutrients in one product.
That completeness is the whole pitch. Rather than a shake sitting alongside your normal diet, Huel is designed to be a meal in its own right, which suits someone who wants to swap out full meals rather than supplement around them. The trade-off is that a nutritionally complete meal replacement is a bigger commitment than a targeted micronutrient capsule. It’s a different job to do, and it asks more of your daily routine than a single small pill.
Best for Natural Ingredient Shakes – Purition
Purition makes natural protein powders and meal replacements aimed at fitness-minded shoppers. The brand describes its shakes as a small meal for when there’s no time to cook, built from what it calls clean and natural ingredients.
That real food angle appeals to anyone put off by long ingredient lists. It suits someone who wants a quick shake built around recognisable ingredients rather than a lab-formulated blend. The flip side is that natural, whole-food ingredients typically mean a shorter shelf life and less standardised nutrient dosing than a formulated capsule or fortified shake, so it’s less suited to someone who needs a precise, consistent daily nutrient target.
Best for Budget Supplement Range – The Protein Works
The Protein Works has sold over 500,000,000 shakes worldwide, by its own count, and offers a wide range of supplements at what it positions as exceptional prices. It’s a multi-award-winning brand covering everything from protein powders to broader sports nutrition.
That scale is the draw. A catalogue this big means near-endless flavour and format choice, and the pricing position suits anyone stocking up regularly rather than buying a single specialist product. The trade-off with a range this broad is that it’s built for general fitness and sports nutrition shoppers first, not specifically for anyone managing nutrition around weight loss medication.
Best for Structured Weight Loss Programmes – LighterLife
LighterLife positions itself as a fast and safe diet programme, built around full nutrition, mindfulness and support rather than a single product you buy and use alone.
That combination suits someone who wants structure and accountability alongside their food, not just a shake in the cupboard. It’s a genuinely different shape of product to a supplement or a shake range: you’re buying into a programme, which is a bigger commitment than adding a capsule to an existing routine. Anyone who just wants to top up nutrients without joining a full programme will find this a heavier option than they need.
Best for Intermittent Fasting Guidance – The Fast 800
The Fast 800 is Dr Michael Mosley’s intermittent fasting programme, built on what the brand calls the latest scientific research applied to weight loss and healthy living.
It’s less about a product and more about a method, structured fasting windows paired with food guidance. That suits someone who wants a framework for when and how to eat rather than something to swap in for a meal. The catch is that fasting programmes ask for a change in daily eating patterns, which is a different kind of commitment to a shake or a capsule you simply add to whatever you’re already doing.
What To Check Before You Buy
Not every product in this space does the same job, so it’s worth being clear on what you actually need before comparing prices.
- Are you replacing a meal or topping up nutrients? A meal replacement shake or bar is designed to sit in place of breakfast, lunch or dinner and needs a fuller macronutrient profile. A micronutrient supplement is designed to run alongside your normal food intake and fill specific gaps, which matters most if your appetite has changed and you’re eating less overall.
- Does the format suit your daily routine? Capsules are quick and portion-controlled. Shakes take a few minutes to prepare and need somewhere to store the powder or bottle. Structured programmes ask for more planning around meal timing.
- Is it formulated for your situation, or just general fitness? Products aimed broadly at gym-goers and sports nutrition shoppers aren’t necessarily formulated with reduced appetite or medication side effects in mind. If you’re on or coming off a GLP-1 receptor agonist, a product built with that specific situation in mind is worth checking against one built for general fitness.
- What’s actually in a serving? Look past the marketing copy at the specific vitamins and minerals listed and check they match what you might be missing. The NHS guidance on vitamins and minerals is a useful independent reference point for what your body needs daily and where shortfalls commonly show up.
Which One Is Right for You
If you want a full meal swapped out for something quick and nutritionally rounded, Huel or Purition both do that job, just with different ingredient philosophies. If you want a structured programme with food and support built in, LighterLife or The Fast 800 offer that, one through full nutrition and mindfulness coaching, the other through intermittent fasting guidance. If you’re stocking up on general sports nutrition at scale, The Protein Works has the range and the pricing model for it.
But if what you actually need is nutrient support while your eating pattern has changed on a GLP-1 medication, none of those five were built with that specific situation in mind. Aluna by Shake That Weight was, with chromium for macronutrient metabolism and blood glucose maintenance, B-vitamins for tiredness and and a spread of vitamin D, iron, zinc, iodine and magnesium glycinate in one daily vegan capsule. For that particular gap, it’s the option built for the job rather than adapted to it.
