Serious Mass Strawberry 2.73kg
by Optimum Nutrition
Optimum Nutrition Serious Mass is one of the most established mass gainers on the market, delivering 1,258 kcal and 53g protein per 334g serving via a blend of whey concentrate, casein, and egg albumen alongside maltodextrin as the primary carbohydrate source. Best for Hardgainers with a fast metabolism struggling to gain weight and People who cannot eat sufficient whole food calories due to appetite issues.
According to the AIScored 0–100 scoring system, Serious Mass Strawberry 2.73kg by Optimum Nutrition scores 63.0/100, ranking #21 out of 23 products in Mass Gainers (2026). Strongest category: Effectiveness (74.0/100). Weakest: Certifications (42.0/100).
Is Serious Mass Strawberry 2.73kg worth buying?
“I'll check for relevant skills before writing the opinion. <details> <summary>Using Skill tool to check for product writing guidance</summary> </details> Serious Mass Strawberry is a heavyweight calorie-packer that consistently delivers real results for people who struggle to eat enough food, offering a stomach-friendly 1,258 kcal per serving with a genuinely pleasant strawberry milkshake taste. At 63/100, it's a proven workhorse for muscle gain rather than a cutting-edge formula, but if you're serious about piling on mass without the food hassle, it's earned its reputation for good reason.”
What Do Reviewers Say About Serious Mass Strawberry 2.73kg?
Sample excerpts from currently available source material used in this product analysis.
"Just tried. My first try now taste good I like it but at half bottle of drink I start feeling my head heavier. I guess I have to use only one scoop instead of 2 scoops."
"Verify good. Yes I have put on kilos on am beater good very tahnk you there's a bit stronger ones like. ultra strong on massive mass strongerrrr yesssss good 10 pocent to2 ultra strong in mass protein thanks youuuuuuuuuuuu love internationa..."
"Lovely. Bought the strawberry flavour, tastes very nice just like having a strawberry milkshake, put on a few 1lbs aswell"
"Have this product on subscribe and save so only recently opened my most recent delivery, and there is next to no flavour, never had this issue before, but with this bag it taste horrible"
"I only use this brand of mass gainer… reason being it sits will in my digestive system, it definitely does what it supposed to do. I have used other brands, cheaper brands but they do not pack the punch this do 💪 I have literally been buyin..."
How does Serious Mass Strawberry 2.73kg score?
Detailed score breakdown and key findings from our analysis of 12 reviews across 2 sources.
Pros
- +Proven weight gain results — multiple reviewers report consistent mass gain across months and years of use
- +Strawberry flavour praised as pleasant, likened to a milkshake
- +Exceptional caloric density (1,258 kcal/serving) suits hardgainers and those struggling to meet calorie targets through food alone
- +Comprehensive vitamin and mineral profile (25 micronutrients) adds nutritional breadth beyond macros
- +Strong long-term brand trust — Optimum Nutrition is one of the most reputable supplement brands globally
Cons
- -Creatine dose is only 1g per serving — below the clinically effective 3–5g daily maintenance threshold
- -Primary carbohydrate source is maltodextrin (high GI), which is cheap bulk filler rather than a quality complex carb
- -Serving size (334g) is extremely large — requires a blender; won't fit standard shaker bottles and can cause bloating
- -Not third-party tested; occasional batch inconsistency reported by reviewers (flavourless batches)
Best For
Watch Out
- !Creatine is underdosed at 1g — users wanting creatine benefits should supplement separately at 3–5g/day
- !High maltodextrin content spikes blood sugar rapidly — unsuitable for those with insulin sensitivity concerns
- !Contains milk, egg, soy, and gluten — not suitable for those with these allergies or lactose intolerance
- !21.8g sugar and 547mg sodium per serving — relevant for those monitoring these intake levels
- !Full serving may cause bloating or digestive heaviness; new users advised to start at half serving
What is Serious Mass Strawberry 2.73kg?
Serious Mass Strawberry 2.73kg is a mass gainers product by Optimum Nutrition in powder form, scoring 63.0/100 on AIScored.
- • Product Overview: A high-calorie mass gainer delivering over 1,250 kcal per serving to support serious weight gain, with 50 g protein, 250+ g carbohydrates and 3 g added creatine to aid muscle recovery and performance when combined with resistance training.
- • Performance Benefits: Delivers more than 1,260 kcal per serving to boost daily calorie intake for weight gain.
- • Provides 50 g protein per serving to support muscle growth and repair.
- • Supplies over 250 g carbohydrates to provide substantial energy and caloric density.
- • Includes 3 g added creatine per serving to support performance during intense training.
- • Active Ingredients That Matter: 50 g high-protein content to support muscle growth and repair; over 250 g carbohydrates to supply substantial calories and energy; 3 g added creatine to support performance; and 25 vitamins & supplements to contribute to overall nutritional support.
- • How To Use: Add two heaped scoops of Serious Mass (334 g) to a blender filled with 710 ml of water and blend for 45–60 seconds.
- • Add a few ice cubes and, if desired, other calorie-contributing ingredients, then blend for a further 30–45 seconds.
- • For a thicker, creamier, higher-calorie shake, mix two scoops with 710 ml of non‑fat or low‑fat milk instead of water.
- • New users may prefer to begin with ½ serving daily for the first week, then gradually increase to one or more full servings several times a day.
- • Suggested timing: drink ½–1 serving between meals to maintain a positive nitrogen balance; consume ½–1 serving 30–45 minutes post-workout to support recovery; or take ½–1 serving about 45–60 minutes before bed to provide nutrients overnight.
- • For best results use Serious Mass alongside intense weight training (3–5 times per week) and a sensible whole foods diet, allowing at least 48 hours between workouts for the same body parts.
- • Best Suited For For lifters and hardgainers seeking a convenient, high-calorie solution to increase body mass, support muscle recovery and enhance performance.
What's Inside Serious Mass Strawberry 2.73kg?
Serious Mass Strawberry 2.73kg contains 46 active ingredients: Per, Of which saturates, Of which sugars, Protein and more.
Active Ingredients
- Per
- 334g: Energy 5269kJ / 1258kcal
- Of which saturates
- 1.6g
- Of which sugars
- 21.8g
- Protein
- 53.1g
- Total Carbohydrate
- 251.5g
- Total Fat
- 4.4g
- Of which trans fats
- 0g
- Dietary fibre
- 0g
- Sodium
- 547mg
- Vitamin A
- 299.3mcg
- Vitamin D
- 1.9mcg
- Vitamin E
- 3.5mg
- Vitamin C
- 21.9mg
- Folic Acid
- 71.3mg
- Biotin
- 54.8mcg
- Potassium
- 1012.5mg
- Chloride
- 649mg
- Calcium
- 355.7mg
- Phosphorus
- 130.7mg
- Magnesium
- 56.8mg
- Iron
- 4.3mg
- Zinc
- 2.7mg
- Copper
- 0.5mg
- Manganese
- 0.6mg
- Selenium
- 42.6mcg
- Chromium
- 130.4mcg
- Iodine
- 50.8mcg
- Creatine Monohydrate
- 1g
- L-Glutamine
- 501mg
- Glutamine Peptides
- 501mg
- Choline Bitartrate
- 607.9mg
- Inositol
- 250.5mg Macro Nutrient table: Energy Kcal per 100g 377Kcal
- Energy kJ per
- 100g 1578kJ
- Fats per
- 100g 1.3g
- Of which Saturates per
- 100g 1g
- Carbohydrates per
- 100g 75.4g
- Sugar per
- 100g 6.5g
- Protein per
- 100g 15.9g
- Salt per
- 100g 0.16g
- Fats per serving
- 4.4g
- Of which Saturates per serving
- 3.4g
- Carbohydrates per serving
- 251g
- Sugar per serving
- 21.8g
- Protein per serving
- 53.1g
- Salt per serving
- 0.547g
- Serving size
- 334g
Other Ingredients
Maltodextrin, Protein Blend (Whey Protein (Milk) Concentrate, Calcium Caseinate (Milk), Egg Albumen, Sweet Dairy Whey), Cocoa (Processed with Alkali), Natural and Artficial Flavour, Vitamin and Mineral Blend (diPotassium Phosphate, Magnesium Aspartate, diCalcium Phosphate, Calcium Citrate, Ascorbic Acid, Niacinamide, Zinc Citrate, Beta Carotene, d-Calcium Pantothenate, d-alpha Tocopheryl Succinate, Selenomethionine, Copper Gluconate, Ferrous Fumerate, Manganese Amino Acid Chelate,
Is Serious Mass Strawberry 2.73kg Independently Tested?
No Third-Party Testing Visible
We could not find evidence of independent third-party testing for this product. This doesn't mean it's unsafe, but independent verification provides additional assurance.
How We Score Supplements
Our methodology analyses review data, ingredient science, and product information, then scores each product on a 0-100 scale across evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on reviews and ingredient evidence.
Ingredient Quality
Bioavailable forms, clinically effective dosages, clean label, minimal fillers.
Value for Money
Price relative to ingredient quality, dosage count, and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 100 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
How Does Serious Mass Strawberry 2.73kg Compare?
See how this product stacks up against the top-rated mass gainers in our database.
| Product | Score | Price |
|---|---|---|
| Serious Mass Strawberry 2.73kg (this) | 63.0 | £40.00 |
| Critical Mass Professional Lean ... | 80.0 | £40.00 |
Price History (90 days)
Quick Facts
- Form
- powder
- Serving
- 1 serving
- Vegan
- No
Frequently Asked Questions
Is Serious Mass Strawberry 2.73kg worth buying in 2026? ▼
What is the best price for Serious Mass Strawberry 2.73kg in the UK? ▼
What are the pros and cons of Serious Mass Strawberry 2.73kg? ▼
Is Serious Mass Strawberry 2.73kg third-party tested? ▼
How does Serious Mass Strawberry 2.73kg compare to Critical Mass Professional Lean Mass Gainer Banana 2.4kg (16 Servings)? ▼
Disclaimer: AIScored provides research-backed summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Affiliate links may earn us a commission at no extra cost to you.
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