Meal Shakes

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What Makes a Great Meal Replacement Shake?

Not all meal replacement shakes are creat...

What Makes a Great Meal Replacement Shake?

Not all meal replacement shakes are created equal. At Protein Works, our Diet Meal 360 and Complete Meal 360 shakes are built from real food ingredients - a precise tri-protein blend combined with the right balance of fats, fibre and micronutrients to genuinely replace a meal, not just mimic one.

Our in-house nutrition team developed the formulas behind our meal shakes, benchmarking against the highest standards in nutrition. The result? A shake that keeps you feeling full for longer, supports your body composition goals, and actually tastes like something you'd want to drink every day.

Whether you're looking to manage your calories, simplify your nutrition or fuel a busy lifestyle, our meal shakes come in multiple innovation tiers - BLACK, GOLD and PLATINUM - across a huge range of flavours. And for those following a plant-based diet, our Vegan Diet Meal 360 delivers the same quality in a 100% plant-based formula.

There's a reason we've sold over 500 million shakes worldwide

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  • Diet Meal 360 - PLATINUM Innovation
    92%
    (1103)

    “I love these shakes. For someone who struggled having breakfast these shakes make it so easy for me. I'm nearly at my goal weight as well." – CC

    from£22.99£12.79

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  • Complete Meal 360 - PLATINUM Innovation
    100%
    (3)

    "I've tried a lot of meal replacement shakes and can honestly say this is the tastiest and most filling, 5/5 from me!" - Carla

    from£21.49£8.49

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  • Vegan Diet Meal 360 - PLATINUM Innovation
    91%
    (209)

    “I've been having 2 shakes a day for the past 4 weeks, and so far half a stone down!”...– Caroline

    from£22.99£12.79

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  • Diet Meal 360 - GOLD Innovation
    95%
    (1316)

    “Has really helped with weightless but also feeling much better generally. Less fatigue and fe...C

    from£17.99£10.19

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  • Diet Breakfast 360 - GOLD Innovation
    89%
    (128)

    “It's absolutely delicious, fills me up and sets me up for the day. Plus I've lost weig...Jennifer

    from£18.99£12.29

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  • Complete Meal 360 - GOLD Innovation
    85%
    (43)

    “Been having this as my breakfast in the mornings and it's great. Tasty, smooth and fillin...Riley

    from£17.99£7.49

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  • Vegan Complete Meal 360 - GOLD Innovation
    87%
    (75)

    “Got on this big time, saves the cash at lunch time, beats all the awful nutritionals fr...-*Jamie

    from£17.99£7.49

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  • Vegan Diet Meal 360 - GOLD Innovation
    94%
    (305)

    “These meal replacements are perfect for busy mornings and lunch. I really look forward t...Selina

    from£17.99£10.19

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  • Diet Meal 360 - BLACK Innovation
    82%
    (11)

    “Highly recommend this product, keeps my fuller for longer and tastes great! Really helping with my weight loss too." - Charlie

    from£11.99£7.99
  • Vegan Pea Protein - BLACK Innovation
    87%
    (140)

    "This shake is phenomenal. It tastes amazing, and not "salty"." - Matthew

    from£16.29£6.99
  • Vegan Soy Protein - BLACK Innovation
    90%
    (423)

    "The best thing about this is the texture which is great, miles better than other vegan pro...Sean

    from£10.99£9.99
  • 100% Micellar Casein - BLACK Innovation
    92%
    (275)

    "I add a small amount of water and mix and have it as a moose for after dinner, to stop t...Ashley

    from£24.29£20.99

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Frequently Asked Questions

A meal shake or meal replacement is a nutritionally complete drink designed to substitute a full meal. Unlike protein shakes, which primarily supplement protein intake, meal replacement shakes provide a balanced combination of protein, carbohydrates, fats, fibre, vitamins, and minerals - delivering the nutritional profile of a balanced meal in a convenient, calorie-controlled format. They are commonly used for weight management, busy lifestyles, or structured nutrition programmes.

Yes, when used correctly. Multiple studies support the effectiveness of meal replacement shakes for weight management, particularly when substituting one or two higher-calorie meals per day. They work by providing controlled, predictable nutrition that removes the guesswork from calorie management. Results depend on overall dietary habits - shakes are a tool, not a standalone solution, and work best as part of a structured approach to nutrition.

Yes. Meal replacement shakes are among the most well-researched tools for weight loss. By replacing a higher-calorie meal with a nutritionally complete, calorie-controlled shake, you create a consistent calorie deficit without sacrificing essential nutrients. Research published in peer-reviewed journals has shown that structured meal replacement programmes often produce greater short-term weight loss than conventional calorie-restricted diets alone. 

A well-formulated meal replacement shake should. The key factors are fibre content - which slows digestion and prolongs satiety - alongside adequate protein, which is the most filling macronutrient. Shakes with 5g or more of fibre and at least 25g of protein per serving tend to provide meaningful satiety. Individual responses vary depending on metabolism, activity level, and what else is consumed throughout the day.
Check out our full guide on how meal replacements keep you feeling full.

It's not recommended long-term. Replacing one or two meals per day with shakes is a well-supported and effective approach. Replacing all meals entirely removes the variety, food volume, and whole-food nutrients that contribute to long-term health and dietary adherence. Most nutrition guidelines suggest maintaining at least one whole food meal per day. If you're considering a full meal replacement programme, consult a healthcare professional or registered dietitian first.

Most meal replacement shakes contain between 200 - 400 calories per serving, depending on the formulation and goal. Diet-focused meal replacements, like our Diet Meal 360, tend to sit at the lower end around 200 - 250 calories to support a calorie deficit. 

Some meal shakes like our Complete Meal 360 are designed to replace a balanced meal and provide between 350 - 400 calories. 

Meal replacement shakes are most effective when used to replace meals where calorie intake is typically hardest to control - breakfast and lunch are the most common choices. Breakfast shakes work well for those who skip meals or reach for high-calorie convenience foods in the morning. Lunch replacements suit busy schedules where healthy meal preparation isn't practical. 

Yes, and they can be very well-suited to it. GLP-1 medications significantly reduce appetite, which means total food intake drops considerably - increasing the risk of inadequate protein, fibre, and micronutrient intake. A nutritionally complete meal replacement shake allows someone on a GLP-1 programme to meet their nutritional needs within a much smaller calorie budget. Look for shakes high in protein and fibre, with a broad micronutrient profile, to offset the nutritional risks of reduced food intake. Check out our full GLP-1 Friendly Range.