Diet Protein
Shop Diet Protein at Myprotein
Diet protein shakes and powders are built for one specific job — delivering high protein intake alongside a nutritional profile designed to work within a calorie-conscious approach. Unlike standard protein powders, diet protein blends are typically formulated with added vitamins, minerals, and fibre, making them a more complete option when you're managing your overall intake carefully. Protein contributes to the growth and maintenance of muscle mass1 — which matters just as much when you're in a deficit as when you're trying to add size.
The range here covers everything from diet protein shakes and meal replacement blends to high-protein whey options with added functional ingredients. Whether you're looking for a diet protein powder to use around training or a diet protein blend to replace a meal, there's a format to suit your routine. Formats vary across powders and ready-to-use shakes, with a wide choice of flavours throughout.
Who Diet Protein Are For
Diet protein powders and shakes are a practical fit for anyone who's keeping a close eye on calories but still wants to hit a meaningful protein target. That covers people who train regularly and want to preserve muscle mass1 while managing their weight, as well as those looking for a more structured nutritional option to replace a meal without tipping their daily totals.
They're also well suited to people who find it difficult to meet protein needs through food alone during a calorie-controlled period. A diet protein shake takes seconds to prepare, travels well, and delivers a consistent macro profile — useful when life gets busy and you need a reliable option that fits the plan.
When to Use Diet Protein
Diet protein powders are versatile enough to fit into almost any point of the day. Many people use a weight loss protein shake as a meal replacement at breakfast or lunch — a practical way to keep calories in check while still getting a solid serving of protein. For those following a more structured approach, substituting two daily meals of an energy-restricted diet with meal replacements contributes to weight loss2.
Around training is another popular window. A diet whey protein shake post-workout gives your muscles the protein they need, without loading up your daily calories. Some options work just as well as a mid-afternoon option when hunger peaks and you need something that fits your targets — the high protein content makes them a more structured choice than typical snacks.
Diet Protein Benefits
High Protein, Controlled Calories
The defining feature of a diet protein powder is the ratio — high protein content relative to overall calorie load. That makes it easier to hit daily protein targets without eating into your calorie budget. Protein contributes to the maintenance of muscle mass1, which is particularly relevant when you're in a calorie deficit and want to hold onto the muscle you've built.
Added Vitamins and Minerals
Many diet protein blends go beyond the macros. Products like Protein Meal Replacement Blend are packed with vitamins and minerals, meaning you're not just getting protein — you're covering a broader range of nutritional bases within a single serving. This is especially useful when overall food intake is lower and micronutrient gaps are more likely.
Meal Replacement Convenience
Diet protein shakes designed as meal replacements offer a straightforward, measured alternative to a full meal. Substituting one daily meal of an energy-restricted diet with a meal replacement contributes to the maintenance of weight after weight loss2. That's a meaningful functional role — and one that makes diet protein a practical long-term tool, not just a short-term fix.
Versatile Formats and Flavours
From diet whey protein powders to blended protein formulas with added functional ingredients, the range gives you options depending on your training style, dietary preference, and daily routine. A wide selection of flavours means you're not locked into one choice — variety helps with consistency, and consistency is what gets results.
Popular Picks
Protein Meal Replacement Blend — A high-protein, high-fibre meal replacement loaded with vitamins and minerals, built for anyone managing their weight without sacrificing nutrition.
Impact Diet Whey — Delivering up to 36g of protein per serving, Impact Diet Whey is formulated with green tea extract, CLA, and added choline for those who want more from their protein shake.
Total Protein Blend — With 24g of protein per serving from a blend of seven protein sources, Total Protein Blend keeps fat and sugar low for those who want straightforward, high-quality protein.
FAQs
What is diet protein powder?
Diet protein powder is a protein supplement formulated specifically to deliver a high protein content within a lower-calorie profile than standard protein powders. Most diet protein blends also include added vitamins, minerals, and sometimes fibre, making them a more nutritionally rounded option for people managing their calorie intake. They come in powder form and are mixed with water or milk to make a shake.
What is the difference between a diet protein shake and a regular protein shake?
A diet protein shake is specifically designed to offer more protein per calorie compared to a standard protein shake, while also typically including a broader micronutrient profile. Regular protein powders focus primarily on protein delivery — useful for general intake goals — while diet protein options are engineered with calorie-conscious use in mind. Some diet whey protein products also include ingredients like choline, which contributes to normal lipid metabolism3.
Which diet protein powder should I choose?
Impact Diet Whey is a strong starting point if you want a straightforward diet protein shake with up to 36g of protein per serving and added choline, which contributes to normal lipid metabolism3. If you're looking for something closer to a full meal replacement, Protein Meal Replacement Blend is packed with vitamins and minerals alongside high protein content, making it a more complete option. The right choice comes down to how you're using it — around training, or as a meal replacement.
Can diet protein powder be used as a meal replacement?
Some diet protein products are specifically formulated as meal replacements — Protein Meal Replacement Blend is a clear example, with a nutritional profile that goes well beyond just protein. Substituting two daily meals of an energy-restricted diet with meal replacements contributes to weight loss2, and substituting one daily meal contributes to the maintenance of weight after weight loss2. Check the individual product to confirm its intended use.
How much protein do diet protein shakes contain?
Protein content varies across the range. Impact Diet Whey delivers up to 36g of protein per serving, while Total Protein Blend provides 24g per serving from a blend of seven protein sources. The right serving size depends on your overall daily protein target and where the shake sits within your wider nutrition plan.
What is diet whey protein?
Diet whey protein is a whey-based protein powder formulated with a lower calorie and carbohydrate content than standard whey, making it more suited to calorie-controlled diets. It typically delivers a high protein yield per serving — Impact Diet Whey, for example, provides up to 36g of protein per serving. Many diet whey products also include added micronutrients or functional ingredients to round out the nutritional profile.
How many types of diet protein are available at Myprotein?
The range includes six products: Protein Meal Replacement Blend, Impact Diet Whey, Total Protein Blend, Impact Whey Protein Milkshake, Breakfast Smoothie, and Origin Pre-Workout. That covers meal replacement blends, diet whey options, multi-source protein blends, and more — so whether you're after a straightforward diet protein shake or something with a broader nutritional profile, there's a format to suit.
Who develops the diet protein products at Myprotein?
Myprotein's expert nutritionists develop every product in the diet protein range. Each formula is built around clear nutritional goals — whether that's maximising protein per calorie, adding functional micronutrients, or creating a product that works as a genuine meal replacement. That expertise sits behind every product, from the macro ratios to the flavour development.
When is the best time to take a diet protein shake?
Diet protein shakes are flexible enough to fit multiple points in the day. Post-training is a popular choice, giving muscles a reliable protein source — protein contributes to the growth and maintenance of muscle mass1 — without a high calorie load. As a meal replacement at breakfast or lunch, they offer a structured nutritional option that fits within a calorie-controlled plan. Mid-afternoon is another practical window when you need something measured rather than a high-calorie snack.
Is diet protein powder suitable for both men and women?
Diet protein powder is suitable for any adult looking to manage protein intake as part of a calorie-conscious approach. The products aren't gender-specific — the nutritional profiles are built around protein targets, calorie management, and micronutrient coverage, which are relevant regardless of sex. Individual needs will vary based on body composition goals, activity level, and daily dietary intake.
1. Protein contributes to the growth and maintenance of muscle mass.
2. Substituting two daily meals of an energy-restricted diet with meal replacements contributes to weight loss. Substituting one daily meal of an energy-restricted diet with a meal replacement contributes to the maintenance of weight after weight loss.
3. Choline contributes to normal lipid metabolism.