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Large Mass Gainers (3kg+)

Guides and comparisons How to compare whey protein products

Mass gainer powders in packs of about 1 kg to 9 kg, in chocolate, vanilla, strawberry, cookies and cream, banana and many other flavours. Two subcategories sort them by pack weight, Mass Gainers 3–5kg and Mass Gainers 5kg+, and the 3–5kg band splits again into chocolate and other flavours. Check the serving size in grams, the protein, carbohydrate and calories in each serving and how many servings the pack holds, then compare the price per serving as well as per kilogram.

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Price per kilogram = pack price ÷ net quantity in kilograms. Prices include the selected country’s VAT; delivery is separate.

Mutant Mass, Strawberry Banana - 6800 grams Mutant Mutant Mass, Strawberry Banana - 6800 grams Metabolic Mass Gainer, Almond - 6000 grams Dorian Yates Metabolic Mass Gainer, Almond - 6000 grams Instant Mass Heavyweight, Strawberries & Cream - 5400 grams Reflex Nutrition Instant Mass Heavyweight, Strawberries & Cream - 5400 grams Critical Mass - Original, Chocolate - 6000 grams Applied Nutrition Critical Mass - Original, Chocolate - 6000 grams
Pack size 6,800 g 6,000 g 5,400 g 6,000 g
Main ingredients Multi-source protein and carbohydrate mass gainer powder Multi-source protein and carbohydrate mass gainer powder Multi-source protein and carbohydrate mass gainer powder Multi-source protein and carbohydrate mass gainer powder
Pack price €108.99 €89.99 €63.99 €48.99
Price per kilogram €16.03 €15.00 €11.85 €8.17
Allergen information Contains milk; may contain soy, nuts and eggs. Contains milk; may contain soy, nuts and eggs. Contains milk; may contain soy, nuts and eggs. Contains milk; may contain soy, nuts and eggs.
Certifications — — — —
Label information Label information Label information Label information Label information

Authorised EU Health Claim (HC-025 • Reg. (EU) 432/2012)

“Carbohydrates contribute to the recovery of normal muscle function (contraction) after highly intensive and/or long-lasting physical exercise leading to muscle fatigue and the depletion of glycogen stores in skeletal muscle”

Conditions of use: The claim may be used only for food which provides carbohydrates which are metabolised by humans (excluding polyols). Information shall be given to the consumer that the beneficial effect is obtained with the consumption of carbohydrates, from all sources, at a total intake of 4 g per kg body weight, at doses, within the first 4 hours and no later than 6 hours, following highly intensive and/or long-lasting physical exercise leading to muscle fatigue and the depletion of glycogen stores in skeletal muscle.

A varied, balanced diet and a healthy lifestyle are important.

Prices include VAT for Ireland. Courier delivery: €6.99; free from €65.00. Estimated delivery: 2–4 working days.

Product facts checked: 2026-10-28.

Frequently asked questions

What pack sizes do large mass gainers come in?

Titles list net weights from about 1 kg to 9 kg. Mass Gainers 5kg+ holds the largest packs, from about 5.4 kg to 9 kg, and Mass Gainers 3–5kg holds the rest. Several gainers are sold in both a smaller and a larger pack, so check the net weight in the title and on the label.

How do I work out how many servings a large pack holds?

Divide the net weight in grams by the serving size in grams from the nutrition table. If the serving is given in scoops, the label also states the weight of one scoop, and scoops differ between products. Many packs print the number of servings as well, so you can check your result.

Do all mass gainers use the same kind of protein?

No. The ingredient list names the ingredients in descending order of weight, including the protein sources. Milk proteins such as whey and casein are common, and some gainers use other proteins, such as beef protein, instead of milk proteins or alongside them. Where milk proteins are used, milk is emphasised as an allergen in the list.