Best-Rated Weight Loss Shakes

See Our Ratings Methodology.


Most Satisfied Customers | ALDI Slim & Trim

Aussies have rated ALDI Slim & Trim as the top pick in Canstar Blue’s latest weight loss shake ratings, with five-star reviews for all categories, including effectiveness, taste, value for money, texture & consistency, variety & range, packaging and overall satisfaction.

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How we rate weight loss shakes

Our review compares weight loss shakes on customer satisfaction, so you can find out what other Aussies think about the compared brands before you go ahead with a purchase. Think of it as like asking hundreds of your closest mates which weight loss shake they think is best!

Canstar Blue surveyed 943 Australians for their feedback on weight loss shake(s) they have purchased and used in the last six months.

  • The outcomes reported in these ratings are measured via accredited research panels managed by Qualtrics.

Respondents rate their satisfaction with their weight loss shakes brand(s) from zero to ten, where zero is extremely dissatisfied and ten is extremely satisfied. Brand satisfaction was rated by respondents on the following criteria:
  • Overall satisfaction: measures consumer satisfaction with a weight loss shake brand as an individual score NOT a combined total of all criteria.
  • Effectiveness: the weight loss shake was satiating and effective in assisting in weight loss and weight management.
  • Taste: the weight loss shake tasted authentic, matched the flavour description on the packaging, and was made with quality ingredients.
  • Value for money: the weight loss shake price was reasonable given the quality of ingredients and quantity of each serving/multipack.
  • Texture & consistency: the texture/consistency of the weight loss shake was as expected for its type (i.e. milkshake was creamy, smoothie was thick and icy, etc.).
  • Variety & range: the weight loss shake brand offered a wide variety of flavours, serving sizes, multipacks, replacement meals options, etc.
  • Packaging: the packaging was functional and allowed for easy dispensing and storage.

The winning brand is the one that receives the highest Overall satisfaction rating once all the scores from the Overall satisfaction criteria are combined and averaged.

  • Overall satisfaction is asked as a specific question and represents an individual measure, not a combined total of all criteria.
  • When we cannot determine a clear winner from the criteria for the Overall satisfaction rating, we will then look at the other criteria measured in the rating.
    • The brand with the highest number of five-star ratings within the supporting criteria will become the five-star recipient in overall satisfaction, and thus win the award. If a clear leader still cannot be determined from the supporting criteria, joint winners will be declared.

Brands must have received at least 30 responses to be included, so not all brands available in the market have been compared in this survey. The brands rated in this survey are listed below in order of best overall satisfaction.
  • ALDI Slim & Trim
  • Musashi
  • Rapid Loss
  • Slim Right
  • Atkins
  • Optifast
  • BSC
  • FatBlaster
  • The LADY Shake
  • Optislim
  • The MAN Shake

Find more detailed information on our Most Satisfied Customer methodology.

1. ALDI Slim & Trim

ALDI Slim & Trim Review

Rating results

ALDI Slim & Trim achieved five star ratings in all categories including overall satisfaction, effectiveness, taste, value for money, texture & consistency, variety & range and packaging.

Editor’s notes

ALDI Slim & Trim offers Aussies several types of weight loss shakes and protein supplement options for those looking to kickstart a new diet. While it may not have the range that other brands have, ALDI’s Slim & Trim Essential Health line does still have some classic flavours like chocolate, coffee, strawberry, and vanilla. Each meal replacement shake comes in individual serving sachets (55g), so you can buy exactly as many of each flavour as you like and need and can avoid getting stuck with a whole box or tub full of a flavour that doesn’t end up taking your fancy. They’re also handy to chuck in your bag or keep in your work drawer so you’ve always got a meal replacement shake on hand.

2. Musashi

Musashi Weight Loss

Rating results

Musashi received four star ratings for overall satisfaction, effectiveness, taste, value for money, texture & consistency and packaging and a three star rating for variety & range.

Editor’s notes

Musashi’s range of weight loss shakes cover its shred & burn protein powders that assist in building lean muscle. Its main ingredients include whey protein, green tea extract to support metabolism, carnitine for energy metabolism and choline to support liver health among other benefits. You can find plenty of flavours including vanilla and chocolate and varying sizes of product from 340 grams to 900 grams for those who like to buy in bulk.

3. Rapid Loss

Rapid Loss Weight Loss Shake

Rating results

Rapid Loss achieved a five star rating for packaging and four star ratings in all other categories including overall satisfaction, effectiveness, taste, value for money, texture & consistency and variety & range.

Editor’s notes

Rapid Loss provides weight loss shakes and meal replacement shakes to promote weight loss in conjunction with its weight loss program. You can find a number of flavours from chocolate and vanilla to banana and choc mint to suit anyone’s preference. Its meal replacement and weight loss shakes are reduced in sugar, high in fibre and low calorie to keep you full of energy but to help with losing weight.

4. Slim Right

Slim Right Weight Loss Shake

Rating results

Slim Right received four star ratings for overall satisfaction, taste, value for money, variety & range and packaging and three star ratings for effectiveness and texture & consistency.

Editor’s notes

Slim Right is the weight loss supplement brand from Nature’s Way who sell natural proteins, supplements and superfoods such as daily greens. The meal replacement shakes come in flavours including strawberry, vanilla and chocolate and include ingredients such as protein and fibre to promote a balanced diet in replacement to a regular meal. The brand also includes a variety pack that include a number of each flavour so you can try and see which is your favourite.

5. Atkins

Atkins Weight Loss Shake

Rating results

Atkins received four star ratings for overall satisfaction and packaging and three star ratings in all other categories including effectiveness, taste, value for money, texture & consistency and variety & range.

Editor’s notes

Atkins offers a number of products that assist in weight loss including shakes, bars, protein chips and cookies. Its shakes come in a variety of flavours including some standouts such as cafe caramel shake, creamy cinnamon swirl, chai tea iced latte and chocolate banana as well as many more. The weight loss shakes are made with added protein and fibre to make sure you receive the nutrients you need for weight loss as well as keeping a balanced diet. You can purchase shakes in packs of four and eight or multi packs if you want to buy in bulk.

6. Optifast

Optifast Weight Loss Shake

Rating results

Optifast received three star ratings across all categories including overall satisfaction, effectiveness, taste, value for money, texture & consistency, variety & range and packaging.

Editor’s notes

Optifast offers a number of weight loss products including shakes and soups as well as a membership program to a multi-level weight loss program. Its VLCD shakes include a number of flavours such as vanilla, chocolate, strawberry, coffee, banana, caramel and more with protein plus options also available. The meal replacement shakes include a number of added vitamins essential to a balanced diet as well as a generous serving of protein.

7. BSC

BSC Weight Loss Shake

Rating results

BSC was rated four stars for texture & consistency, taste and effectiveness, with three stars for value for money, variety & range, packaging and overall satisfaction.

Editor’s notes

BSC is primarily known for its range of protein supplements, with its weight loss shake offerings leaning more towards those looking to shred down or go for low-carb diets. Those looking for weight management may be interested in the Shred Carnitine range, which aims to help assist with weight loss or weight management, metabolic rate, immune system and thyroid functionality, coming in a variety of tubs and flavours such as watermelon, sour berry, mango pash and grape.

8. FatBlaster

FatBlaster Weight Loss Shake

Rating results

FatBlaster was rated four stars for packaging, value for money, taste and effectiveness, with three stars for variety & range, texture & consistency and overall satisfaction.

Editor’s notes

FatBlaster is known for its weight loss programs, with products aligning with the multiple programs to help you find the best option for your fitness goals. Products include meal replacement shakes, snacks, cleanses and keto-specific products, with flavours in the meal replacement range including vanilla, chocolate, raspberry and caramel,with tubs or sachets available to purchase. FatBlaster also offer the Platinum+ range which includes ThermoBurn for additional benefits, as well as variety packs to help you find what you’re looking for.

9. The LADY Shake

The LADY Shake

Rating results

The LADY Shake was rated four stars for value for money and variety & range, with three stars for packaging, texture & consistency, taste, effectiveness and overall satisfaction.

Editor’s notes

Stablemate to The MAN Shake, The LADY Shake offers a similar lineup to its counterpart, with shakes, bundles, snacks and accessories all available to purchase, including variety packs for when you want to try a few options, or simply can’t decide on your flavour of choice. Flavours include the staples of chocolate, vanilla and cookies & cream, with the GO! range featuring vanilla latte and mocha flavours for those looking for a coffee kick as well.

10. Optislim

Optislim Weight Loss Shakes

Rating results

Optislim was rated four stars for value for money, variety & range and packaging, with three stars for texture & consistency, taste, effectiveness and overall satisfaction.

Editor’s notes

Operating for over the past 25 years, Optislim offers a variety of ranges for people to choose from, including ‘For Him’, ‘For Her’, VLCD (which stands for Very Low Calorie Diet) in addition to snacks, meal options and accessories such as shakers and blenders. Flavours include salted caramel, coffee, chocolate and vanilla, with plant-based options also available for those with dietary requirements and preferences, along with sample packs for those who want to try a bit of everything.

11. The MAN Shake

The Man Shake Weight Loss Shake

Rating results

The MAN Shake was rated four stars for packaging, variety & range, value for money and taste, with three stars for texture & consistency, effectiveness and overall satisfaction.

Editor’s notes

Built for blokes who are looking to lose a few kilos, The MAN Shake offers a variety of weight loss shakes and snacks, along with accessories such as books, workout gear and shakers to help you with the weight loss journey. Weight loss shake flavours include chocolate, vanilla, honeycomb, choc mint, banana, cookies & cream and more, with variety packs also available for those who can’t decide on which flavour to try next. The MAN Shake also lists nutritional information online to help you do the maths on your intake, with bundles also available for those looking to stock up.

Weight loss shake buying guide

Do weight loss shakes work?

Yes, weight loss shakes can work. That’s the short answer, but only if you follow the guidelines properly and really commit to the challenge. However, weight loss shakes are not a magic solution or magic diet pill that will see you shedding kilos in no time. Losing weight requires patience, dedication, and willpower.

Ultimately, the best weight loss shakes should keep you full and satisfied between meals, to avoid naughty temptations. The danger of consuming shakes with very few calories (usually between 50-200 calories per serve) is that you could end up more prone to snacking or even turn to the sort of meals you are supposed to be replacing.

When asked whether they have lost weight using diet shakes, survey respondents told us:

  • Yes, I have lost some weight: 60%
  • Yes, I have lost all the weight I intended: 15%
  • No, I have not lost any weight: 22%
  • No, I have put on more weight: 3%

What’s in weight loss shakes?

Weight loss shakes are claimed to be made with a combination of different fibres, proteins, vitamins and minerals, plus some other additives and flavours depending on the brand.

Keep in mind that it’s important to check the sugar content of weight loss shakes, which can vary significantly across different products. It’s the same case with protein bars. Some products are packed with over 20g of sugar per serve, while others include less than 2g. Not only is consuming an excessive amount of sugar bad for you, but it’s also unlikely to suppress your appetite for long. If you want a weight loss shake that keeps you full for as long as possible, it could be worth looking at those with a large amount of protein.

How much do weight loss shakes cost?

Using diet shakes to replace one or two meals each day can prove to be an expensive way to drop the kilos. Our survey revealed Aussies are spending an average of $61 on diet shakes per month.

A useful way to judge whether it’s worth trying diet shakes, at least in terms of cost, is to work out how much you would normally spend on the meals that you’re replacing. However, there can be a significant difference in price between brands, so make sure to check how many servings you’re getting for your money. Generally speaking, buying meal replacement shakes in bulk is the cheapest way to go. Some diet drinks also come in sachets – which makes it easy to work out how many you will need for a week or month – while others come in large tubs, requiring a little more brainpower to determine how much you’ll need.

About our consumer experts


Kate King: Home & Lifestyle Content Producer

This report was written by Canstar Blue’s Home & Lifestyle Content Producer Kate King. Kate holds a Bachelor of Creative Industries from QUT majoring in Journalism and Media and Communications, and has written for a number of publications over the past five years.


Meet the Editorial Team


Samantha Howse: Consumer Research Specialist

Sam Howse Research Specialist

Samantha Howse is Canstar Blue’s Consumer Research Specialist, coordinating the consumer research program behind our customer satisfaction awards across Canstar and Canstar Blue in Australia and New Zealand. Sam has earned a Bachelor of Business (Marketing) from Griffith University and, with seven years in market research and 2 years in marketing, she is experienced in survey design, implementation and analysis, coupled with an understanding of marketing principles and best practice.


Meet the Research Team

Past ratings

Here are the past winning brands from Canstar Blue’s weight loss shakes review:

  • 2022: ALDI Slim & Trim
  • 2021: The Man Shake
  • 2020: ALDI Slim & Trim
  • 2019: ALDI Slim & Trim
  • 2018: ALDI Slim & Trim
  • 2017: Celebrity Slim
  • 2016: IsoWhey
  • 2015: ALDI Slim & Trim
  • 2012: Optifast

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