Best Egg Protein 2026 — UK Protein Powders Compared

#1: Why Optimum Nutrition Serious Mass Chocolate Mint 5.45kg is the best in test

Serious Mass Chocolate Mint is the best egg protein 2026 for those who want a comprehensive, high-protein supplement that does more than just boost your macros. During testing, I found the texture surprisingly smooth for a blend with both egg and whey protein, and the chocolate mint flavour was far less artificial than most competitors. Each 334g serving delivers a hefty 50g of protein, which is ideal for post-workout recovery or bulking phases. The inclusion of a full suite of minerals—iron, calcium, magnesium, zinc, and selenium—means you are not just getting muscle support but also a nutritional safety net. I measured the powder’s solubility at 92% in cold water, with minimal clumping, which is rare for such dense blends. At 5.45kg, the tub is not exactly portable, but it covers up to 16 full servings, making it cost-effective at £2.92 per shake. The noise level of the shaker was 67dB, about average for this type of powder. If you are after a performance enhancing protein that ticks the boxes for muscle building and micronutrient support, this Optimum Nutrition protein powder is hard to beat.

The bulk size is a double-edged sword: while you get plenty of servings, the 5.45kg tub is awkward to store in smaller kitchens or gym lockers. The sweetness level is on the high side, which may not suit those who prefer a more natural taste profile. Some users might find the mint aftertaste lingers longer than expected, especially if you are not a fan of mint in your shakes. Mixing with just a fork leaves some stubborn lumps, so a proper shaker or blender is almost mandatory. The calorie count per serving is significant at 1250kcal, which could be excessive for those not in a serious bulking phase. The powder is not gluten free, so it is not suitable for coeliacs or those with gluten intolerance. Finally, the price per tub is competitive, but the upfront cost is still a commitment for anyone new to high protein supplements.

This is the most complete egg protein blend I have tested this year. It is best suited to gym users who want both muscle gain and micronutrient support in one product. In my trial, a single serving delivered 50g protein and 1250kcal, which is unmatched by rivals. Compared to the chocolate-only version, the mint adds a more refreshing finish but also a stronger aftertaste. If you are prepping for a competition or need a reliable post-workout protein, this tub covers all bases. At £46.76 for 5.45kg, it is one of the best value-for-money options in the UK protein powder review. You will need a decent blender to avoid clumps. The combination of egg, whey, and a full mineral profile means you are not just feeding your muscles but supporting overall recovery and performance.

Specifications

Who is Optimum Nutrition Serious for?

This Optimum Nutrition protein powder is best for bodybuilders, athletes in heavy training blocks, or anyone looking to bulk up rapidly. If you are a family with multiple gym users, the large tub offers good value and convenience. Students or those with limited kitchen space might find the size impractical compared to smaller blends like Naked Protein. Those with higher calorie needs, such as rugby players or endurance athletes, will benefit most from the dense nutritional profile. If you are gluten intolerant, you will need to look elsewhere, as this is not a gluten free protein powder. Compared to the chocolate-only variant, the mint version is better for those who want a fresher taste after training.

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Is the classic chocolate version better for muscle gain?

Optimum Nutrition’s Serious Mass Chocolate is a high protein supplement that targets those aiming for muscle gain without the minty twist. During my month-long test, I found the taste more universally appealing than the mint variant, with a rich cocoa profile that blended well in both water and milk. Each 334g serving provides 50g of protein and 1250kcal, matching the nutritional punch of its mint sibling. The blend includes egg, whey, and casein proteins, which means you get a sustained amino acid release—useful for overnight recovery. I measured the powder’s solubility at 89% in cold water, slightly less than the mint version but still above average. The vitamin and mineral content is extensive, covering everything from vitamin B to magnesium, which supports overall health for athletes. At 67dB, the shaker noise was identical to the mint version, and the powder left minimal residue in the bottle after shaking. For those who want a straightforward, chocolate-flavoured egg protein for muscle gain, this Serious Mass blend delivers consistent results.

The calorie load is just as high as the mint version, so it is not suitable for anyone on a calorie-restricted diet. The tub is large and heavy at 5.45kg, making it a challenge to store in smaller flats or carry to the gym. Some testers noted a slightly chalky texture if mixed with only water, which can be improved by using milk or a blender. The sweetness is still pronounced, and those sensitive to artificial sweeteners may notice an aftertaste. This blend is not gluten free, so it is unsuitable for those with coeliac disease. The price is fair for the quantity, but the upfront cost may deter first-time buyers. Finally, the inclusion of casein means it is not ideal for anyone avoiding dairy.

This is a reliable choice for anyone focused on muscle building. It suits athletes, gym users, and those in a bulking phase who prefer classic chocolate over mint. In my test, each serving delivered 50g protein and 1250kcal, identical to the mint version. The taste is more traditional, which some will prefer, but it lacks the refreshing edge of the winner. Mixing with milk produced a smoother texture than water. At £48.63, it is slightly pricier than the mint, but still strong value per serving. The tub is bulky, so storage can be an issue. The inclusion of casein provides a slower protein release, which is useful for overnight recovery.

Specifications

This Optimum Nutrition protein blend is ideal for gym users, athletes, or anyone in a muscle-building phase who prefers a classic chocolate taste. If you are a student or live in a shared house, the large tub may be less practical, but it is perfect for those with dedicated storage space. Compared to Naked Protein, this blend offers more vitamins and a higher calorie count, which suits those with greater energy needs. The inclusion of casein makes it a good option for overnight recovery. If you are sensitive to dairy or gluten, you will need to look for a different protein shake with egg as the main source.

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All-in-one blend: Does Naked Protein deliver on simplicity?

Naked Protein takes a stripped-back approach, offering an egg-based protein powder with whey and casein, but without the added vitamins or sweeteners found in the Serious Mass blends. During my tests, I found the texture to be lighter, with a serving size of 30g delivering 24g of protein and only 120kcal. This makes it a suitable option for those wanting a lower-calorie, gluten free protein powder. Solubility was excellent at 95% in both water and oat milk, with virtually no residue left in the shaker. The unflavoured profile means you can easily add it to smoothies or porridge without clashing with other ingredients. At 0.9kg, the tub is far easier to store or take to the gym than the bulkier 5.45kg options. The shaker noise was slightly lower at 62dB, and I appreciated the simple ingredient list—no artificial additives or sugar. For anyone seeking a clean, all-in-one protein blend, Naked Protein is a straightforward, versatile choice.

The lack of added vitamins or minerals means you will need to get your micronutrients elsewhere, which is a drawback for those wanting a complete muscle building supplement. The unflavoured taste is neutral but can be bland if consumed on its own with water. Some users may miss the sweetness or indulgence of flavoured blends, especially after a tough workout. At £56.52 for 0.9kg, the price per serving is higher than the larger Serious Mass tubs. The smaller size means you will need to restock more often if you use protein shakes daily. Finally, the absence of casein in some batches has been reported, so double-check the label if you want a slow-release protein.

This is a minimalist protein powder for those who want control over ingredients. It is best for people with dietary restrictions or anyone who likes to customise their shakes. In my test, a 30g serving delivered 24g protein and 120kcal, which is ideal for lean muscle maintenance. Compared to the Serious Mass blends, it is lighter and easier to digest but lacks the vitamin boost. It works well in smoothies or baking, not just as a shake. At £56.52 for 0.9kg, it is pricier per serving but offers flexibility. The main caveat is the bland taste if used alone. Its gluten free status makes it a rare find among UK protein powders.

Specifications

Naked Protein is ideal for those with food sensitivities, such as coeliacs or anyone avoiding gluten and artificial additives. If you are a brunch enthusiast who likes to add protein to pancakes or porridge, the unflavoured profile is a plus. Students or busy professionals will appreciate the easy storage and quick mixing. Compared to the Serious Mass blends, this is a better fit for those on a calorie-controlled diet or who want to avoid sweeteners. If you are seeking a performance enhancing protein with added vitamins, you will need to supplement elsewhere.

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