Best Meal Replacement Shakes For Weight Loss 2023

Meal replacement shakes can help take the guess work out of calculating calories.

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The Top Meal Replacement Shakes For Weight Loss


Instant Knockout Complete – The Best Meal Shake For Weight Loss

Rootana – The All Rounder Meal Replacement Shake 

Abnormal - A Customised Shake​ 

Huel Black
- The Most Popular Meal Replacement Shake For Weight Loss

Shakeology - Best Weight Loss Shake Variety

At TRT Center we believe that meal replacement shakes offer a simple and effective way to assist with weight loss, over the years various food models have been posited by governments around the world, and almost all of them have failed miserably. Meal replacement shakes take the guess work out of dietary requirements. Not only do they present an affordable solution to healthy eating, but they're also incredibly convienient. As far as real world application goes, there is probably little as effective as recommending meal replacement shakes for weight loss.

Meal replacement shakes take out a lot of the common pain points with people who are struggling to lose weight, such as portion control and convienience. Mostly being broken down into around 400Kcal per serving, and prepared in seconds, they provide a real working solution in this area, whereas complicated diet plans allow for under reporting calories, which most people struggling with weight loss do (see study). This led doctors to see if using meal replacement shakes for weight loss was more effective than a traditional calorie restricted diet. The answer was quite simply a resounding yes. Meal replacement shakes made the process of managing calories a lot more simple as having an easy measuring system was far less difficult to maintain so the patients were able to effectively track the calories they were intaking. The trial resulted in 93% of the meal shake patients losing 5% or more of their body fat versus 55% of the diet plan group. Meal replacement shakes for weight loss are even available on perscription in many countries, so it's well noted that they are proven to be effective. 

Meal Replacement Shakes FAQ

Some of the most commonly asked questions about meal replacement shakes for weight loss

Do Meal Replacement Shakes Work For Weight Loss?

Yes, medically proven and more effectively than dieting in most studies, they're effective at helping people lose weight quickly especially if they have problems keeping track of calories as they take the guess work out of dieting.

What's The Difference Between Diet Shakes and Complete Meal Replacement Shakes Or Protein Shakes?

Diet shakes are generally less nutritious than meal replacement shakes. The completely shakes that we review here have all your nutritional requirements as balanced by the calories you intake. Protein shakes on the other hand are designed to be an extra to help those training to build muscle meat their protein requirements without adding many calories. Shakes like instant knockout complete, and Huel Black could be considered hybrids between protein shakes and meal replacers, offering the best of both.

Are Meal Replacement Shakes Better With Milk Or Water?

Generally it depends on the brand, but if you're using them to lose weight then as you'd expect they are better to mix with water.

Should I Get Pre Made Shakes Or Powdered Meal Replacements For Dieting?

Powdered shakes are generally far more cost effective, although if you're out and about then grabbing a pre made one is a sensible option. If you're interested in on the go shakes then check out our list of best pre made meal replacement shakes.

The Meal Replacement Shake For WEight Loss - Overall

Instant Knockout Complete

Instant Knockout are mostly known for their weight loss supplements, so it's not much of a surprise that their brand new meal replacement shake is geared towards this goal as well. The blend tastes surprisingly good and the ingredients blend is fantastic for recommending sustainable and healthy weight loss. Instant knockout's complete meal replacement shake is one of the best we've been fortunate to try, only hitting the market in 2022 it's made it's flown straight in to our number one spot. Outstripping some of our previous kitchen staples. It's by far the most filling meal shake that we've ever tried.

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Criteria Score
Fullness 11/10
Nutrition 9/10
Value 9/10
Recommended 10/10

Key Features

Instant Knockout Complete's stand out feature is how full it makes you feel, it's appetite supression is second to none meaning you wont be left feeling hungry.

Who Should Use Instant Knockout Complete Shakes?

Anyone who struggles with hunger in general, especially anyone who's tried meal replacment shakes before and not been successful or is struggling to cut fat. It's not just for athletes, but it is designed for people needing to drop weight quickly like fighters before a weigh in.

What's In Instant Knockout Complete? 

Instant Knockout Complete contains all the nutrition that you need from a complete meal, but with a focus on high volumes of protein.  You can read more about the ingredients here. The protein focus will help you stay satiated and less likely to feel hungry through the day. It is also encriched with the vitamins that you need to make sure that your body is functioning at it's peak. Packed with omega 3&6 something that is highly sort after in a vegan meal replacement shake as well as a whopping 35g of protein it has everything you need to help you lose weight, maintain muscle mass and keep your body healthy. A mix of all natural healthy grains like oats, pulses, seeds and fruits, means you can keep your calories low and get your healthy fats making instant knockout complete great for your body.

Does Instant Knockout Complete Work?

Yes, even swapping out one unhealthy meal, particularly office snack type meals, sandwiches, chips and similar, which have little nutritional content and often more than 500 calories can make a huge difference to mood, energy, BMR and reducing junk calories is always going to have a positive effect on the body. Instant knockout complete is fantastic at reducing hunger cravings, making it ideal for people restricting their calories.

Instant Knockout Complete Is Used By Athletes

Instant Knockout was designed for fighters who need to drop weight quickly for weigh ins without losing muslce. So, they want to lose fat fast, but not the muscle they have. As such the formula has been balanced to help make sure that happens. With endorsements from UFC and boxing greats, it works even at the lower range of fat percentages. 

But that doesn't mean it's a meal shake just for the healthy. The same principle applies to anyone who is looking for a meal replacement shake to lose weight. If it keeps you full and keeps you energised, whilst making sure you can stay in a caloric deficit that is all you need to lose weight.

What Flavours Of Meal Replacement Shake Are There?

This is the one let down of Instant Knockout, as a new meal replacement shake there aren't a great deal of flavours available. It currently only comes in vanilla, but generally speaking when it comes to everyday drinking vanilla is often the best all rounder for most people.

Instant Knockout Complete System - Meal Replacement & Weight Loss Supplements Before And After Stories

Zac here is one of 100's of example stories available on the instant knockout website. And let's be honest he looks shredded, he talks about trying other meal replacement shakes and weight loss in the past and how Instant Knockout meal replacement shakes for weight loss worked for him where others hadn't.

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The Original - Market Leading Meal Replacement Shake


Come on it's Huel, we couldn't not talk about them, but the question that comes up is, which version of Huel should we talk about? At this point they have versions that are high protein, and they have complete meal replacement shakes that are more balanced. There's so much variety in their product range that it's even hard to nail them down on taste or ingredients. Huel is probably the meal replacement shake that you've heard of, it's also one of the most conveinient meal replacers, with it being available pre made in most stores. Whilst it isn't quite the original, with meal replacement shakes being used medicinally for years before it's launch, it is perhaps the first to bring a complete meal shake to a large audience.

Which Huel Is The Best Meal Replacement Shake For Weight Loss?

Technically the answer is Huel Black, but, that does assume that you like Huel Black, whilst it is the best meal replacement shake for weight loss and muscle growth as it packs the most protein, it definitely doesn't taste the best. And flavour matters, for most people on the first step of their weight loss journey we tend to recommend better tasting shakes as transitioning to healthier eating habbits isn't always the easiest thing to do. Huel does have the advantage of having a flavour for everyone though, so it's almost certain you can find one that you like.

Who Should Use Huel Black?

  • Vegans who need more protein
  • Huel fans
  • People looking for a known quantity meal replacer

Does Huel Black Work For Weight Loss?

Short answer yes, but as you can see by it's position on our list we'd recommend that you pick a different meal replacement.

Criteria Rating
Ingredients 9/10
Filling 7/10
Taste 8/10
Texture 7/10
Value 8/10
Recommended 8/10

Best Meal Replacement Shake Samples - Shakeology

Shakeology do one thing really well, and that's offering a range of sample size meal replacement shakes meaning you don't necessarily have to commit to large purchase. So, if you’re unsure about which flavour to get, BeachBody also sells taste samplers and combo packs so that you’re never lost on what to eat next making it a great option for people looking for a diet shake.

What Flavours of Shakeology Can You Get?
A USP of Shakeology and why they made our best meal replacement shakes list, is that there is a range of flavours that are available as sample size shakes, so there’s always something new to try if you tend to get bored of one flavour quite easily. Currently available in the US you can find:

Cookies & Cream Vegan - Strawberry - Strawberry Vegan - Vanilla - Vanilla Vegan - Cafe Latte - Cafe Latte Vegan - Chocolate - Chocolate Vegan

Why We Like Shakeology Meal Replacers

A shake from one of the largest and best-known fitness and nutrition companies in the US, Shakeology is brought to us by the good people of BeachBody.

Described by some as a “powerhouse” of a shake, Shakeology is packed with protein, superfoods, antioxidants, and phytonutrients. Released back in 2009, the shake has remained at the forefront of meal replacement shakes thanks to its expertly crafted blend.

Like many meal replacement shakes, BeachBody claims that the shake will help you lose weight while also providing a boost in energy, support digestion, and perhaps most importantly help fight those deadly junk food cravings. But does Shakeology work? Let’s find out! 

Top Tip For Meal Replacement Shakes


Trust us you'll thank us later, if you do it the other way around the powder will clump up and you'll have some not so delicious chewy clumps of powder in your shake.

Check Out Our List Of The Top Dairy Free Meal Replacement Shakes Here

We run through the best of the best dairy free and vegan meal replacers.

Best Dairy Free Meal Shakes

What To Look For In A Meal Replacement Shake

When deciding on which meal replacement shake is right for you, you'll want to look at the following things, the ingredients, the calories, the fillers and the macros. Don't worry this isn't as complicated as it sounds. Some of this is going to vary across purposes, for example, if you're trying to build muscle then you'll want higher protein, as a rule of thumb this will be at least 1g for every 2lb of your body weight. After that it's not so important where you get your calories from, but remember higher protein will keep you fuller for longer. You'll want to avoid fillers where possible as these are generally unhealthy so when you're looking for healthy meal replacement shakes you'll want to keep an eye out for the below.

Dietary Aids And Enzymes

These will help your body break down the food that goes into it and help keep your gut healthy, most good meal replacement shakes are fortified with the correct enzymes to help you process the shake effectively. 


Macros are the main thing we look at when creating a balanced meal, they're looking at diet in a broader sense, which is why we call them macros, an ideal blend should be around 50% carbs, 30% proteitn and 20% healthy fats.

Vitamins and Minerals

A complete meal replacement shake should have the right amount of vitamins and minerals to make sure you reach your recommeneded daily intake, that means if the shake contains 20% of your days calories it should also contain 20% of your daily vitamins and minerals or "micro nutrients". All the ones on our best meal replacement shakes do.

Omega 3 & Omega 6

This is particularly important with vegan meal replacement shakes as there are very few sources of essential omega oils (which are needed for brain and joint function) outside of fish or ludicrous consumption of walnuts and flax seeds. So, having refined versions of these becomes incredibly important for people following vegan diets, typically most meal replacement shakes get omega 3 and 6 from chia seeds or flax seeds.

Fiber and Prebiotics

Everybody poops, and if you want to keep your digestive system happy you're going to need fibre, and probiotics, again all the shakes on our best meal replacers list contain the right amount of these, but if you're opting for cheaper brands make sure to watch out for this, especially if you're using meal replacement shakes for weight loss, as these are likely to be quite full of chemicals.


You'll of course want to look out for allergens, this could mean making sure you find a lactose free meal replacement shake, or checking for nut allergens. This will of course be dependant on your personal dietary needs.

Get Instant Knockout Complete - Our Top Rated Meal Replacement Shake For Weight Loss

We can't get enough of instant knockout complete, definitely the best new meal replacement shake on the market, so to see what everyone is raving about, us included check it out today!

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