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Serious Mass Chocolate Flavour by Optimum Nutrition — product pack

Pack image shown to identify the product. Decode Label is independent of Optimum Nutrition and is not sponsored or endorsed by it. Trademarks

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Optimum Nutrition

Brand owned by Glanbia (Ireland) · about the brand

Serious Mass Chocolate Flavour

Veg Jain supplement
6.0 Moderate

Decode Label Safety Score

Nutrition · 40% 9.5/10
Ingredient safety · 30% 10.0/10
Processing · 20% 4.5/10
Marketing · 10% 8.3/10
How we got 6.0 Show
Weighted score 8.5/10
Capped — Contains an intense artificial sweetener (named by INS code). Sweeteners are judged by name, and a protein powder is not exempt ≤ 6.0
Final score 6.0/10 · Moderate

Methodology v3.1 (updated 8 Oct 2026) — what changed

This protein supplement is formulated for adults, providing a substantial protein blend and a comprehensive vitamin and mineral profile. The primary carbohydrate source is maltodextrin, which constitutes a significant portion of the product. The presence of artificial flavors and the intense artificial sweetener acesulfame potassium (INS 950) are common in sports supplements but may not be preferred by all consumers. While generally suitable for healthy adults, individuals sensitive to artificial sweeteners or those monitoring their intake of highly processed ingredients should be aware of these components.

At a glance

From the declared label — not a lab test

Findings to weigh

Score limiter Contains an intense artificial sweetener (named by INS code). Sweeteners are judged by name, and a protein powder is not exempt See which concerns held the score down. → Declared allergens Milk + Soy Matters if you have any of these allergies; check the pack’s own allergen statement. →

What’s favorable

  • Whey Protein Concentrate
  • Calcium Caseinate
  • Creatine Monohydrate
  • L-Glutamine
  • Calcium Phosphate Tribasic
  • +24 more →

Adult protein supplement with maltodextrin, artificial flavors, and sweetener

This adult sports supplement provides a blend of proteins, vitamins, and minerals, with maltodextrin as the main carbohydrate. It contains artificial flavors and the intense sweetener acesulfame potassium, which are common in such products but may be a concern for those avoiding artificial additives. It is not intended for children.

Okay for: Healthy adults seeking protein supplementation

Declared allergens: Milk and Soy

Milk· Whey Protein Concentrate, Calcium Caseinate Soy· the pack’s allergen statement

Relevant if you have any of these allergies or intolerances.

Based on the declared ingredient list. This is a risk only to people with the allergy, not a general-population safety issue, so it does not lower the safety score.

Concern breakdown What drives the score, concern by concern · score out of 10, higher = fewer concerns
Key risks: Contains an intense artificial sweetener (named by INS code). Sweeteners are judged by name, and a protein powder is not exempt

Concern breakdown

Score out of 10 · higher = fewer concerns

How this product performs on each concern we check for supplement. This is a breakdown of the same evidence behind the score above — not a separate verdict.

Artificial Sweeteners Significant concern · 3.5/10
Proprietary Blends & Dosing Moderate concern · 4.0/10
Fillers & Additive Burden Moderate concern · 5.0/10
Banned & Adulterant Risk Minor concern · 6.5/10
Added & Hidden Sugar Minor concern · 7.5/10
Stimulant Load No concern identified · 8.0/10
Artificial Colours & Dyes No concern identified · 8.0/10
Excess Sodium & Salt No concern identified · 9.0/10
Micronutrient Overdose Not assessed

1 concern could not be assessed from this label. That means we don't know — not that there's nothing to find.

Other audiences

Avoid
Not intended for children

This is an adult sports-nutrition supplement, formulated for adults for exercise and training. It is not intended for infants or young children.

Why the score is capped

Contains an intense artificial sweetener (named by INS code). Sweeteners are judged by name, and a protein powder is not exempt

Rule S-CAP-01 · Source: Declared ingredient list; EFSA and JECFA acceptable-daily-intake reviews of the named sweetener

What's good

High protein content from a blend of sources

Comprehensive vitamin and mineral blend for nutritional support

Includes performance-enhancing ingredients like Creatine Monohydrate and L-Glutamine

Watch out for

High maltodextrin content (75%) as the primary carbohydrate source

Contains artificial flavors and an artificial sweetener (acesulfame potassium)

Decode Label Analysis

Contains artificial flavors and the artificial sweetener acesulfame potassium (INS 950), which some consumers may prefer to avoid.

Claim check

Front-of-pack marketing claims checked against this product's actual ingredients and nutrition. "Can't verify" means the label does not provide enough information to check the claim — it is not the same as the claim being false.

?
"100% AUTHENTIC" Can't verify

Authenticity is a sourcing/certification claim that cannot be verified from the ingredient list or nutrition panel.

?
"1,243 CALORIES" Can't verify

The label does not state the calorie content as 1,243 calories per serving or per 100g.

?
"50g PROTEIN" Can't verify

The label does not state 50g of protein per serving or per 100g. The nutrition panel shows 76g of protein per 100g.

protein g 76 (per 100g)
?
"254g CARBS" Can't verify

The label does not state 254g of carbohydrates per serving or per 100g.

✓
"HIGH PROTEIN MUSCLE BUILDING & WEIGHT GAIN FORMULA" Checks out

Protein provides 81.7% of this product’s energy, meeting the 20% a “high protein” claim requires. (Protein claims are set on % of energy, not % by weight.)

Protein 76 g Energy 372 kcal 81.7% of energy from protein
✓
"HELPS BOOST CALORIE INTAKE" Checks out

The product has a high calorie content (372 kcal per 100g) and is designed for weight gain, which supports the claim of boosting calorie intake.

energy kcal 372 (per 100g)
✓
"HELPS BUILD AND MAINTAIN MUSCLE" Checks out

The product contains a protein blend and is marketed as a 'muscle building' formula, which supports the claim of helping to build and maintain muscle.

Protein Blend (18%) HIGH PROTEIN MUSCLE BUILDING & WEIGHT GAIN FORMULA
✓
"HELPS FUEL INTENSE WORKOUTS" Checks out

The product contains maltodextrin (75%) and is a high-calorie, high-carbohydrate formula, which provides energy to fuel intense workouts.

Maltodextrin (75%) energy kcal 372 (per 100g)
✓
"CHOCOLATE FLAVOUR" Checks out

The ingredients list 'Artificial Flavor (Chocolate)' and 'Cocoa Powder (Processed with Alkali)', confirming the chocolate flavor.

Artificial Flavor (Chocolate) Cocoa Powder (Processed with Alkali)

Read straight from the back-of-pack photo — quantities, sections and any disguised terms, so the small print can’t hide behind the marketing.

  • 1.
    Maltodextrin 75%
    Maltodextrin (75%)
  • 2.
    Protein Blend 18%
    Protein Blend (18%)
  • Whey Protein Concentrate within Protein Blend
  • Calcium Caseinate within Protein Blend
  • Whey Powder within Protein Blend
  • 3.
    Emulsifier
    Lecithin (INS 322(i))
    Emulsifier (INS 322i)
  • 4.
    Cocoa Powder
    Cocoa Powder (Processed with Alkali)
  • 5.
    Artificial Flavor
    Artificial Flavor (Chocolate)
  • 6.
    Creatine Monohydrate
  • 7.
    L-Glutamine
  • 8.
    Vitamin and Mineral Blend
    Vitamin and Mineral Blend (Sodium Chloride, Calcium Phosphate Tribasic, Magnesium Phosphate, Calcium Lactate, L-Ascorbic Acid, Zinc Sulfate, DL-Alpha-Tocopheryl Acetate, Nicotinamide, Ferric Pyrophosphate, Manganese Sulfate, Calcium D-Pantothenate, Pyridoxine Hydrochloride, Riboflavin, Thiamine Mononitrate, Retinyl Palmitate, Folic Acid, D-Biotin, Potassium Iodide, Chromium Chloride, Sodium Molybdate, Sodium Selenite, Ergocalciferol, Cyanocobalamin)
  • Sodium Chloride within Vitamin and Mineral Blend
  • Calcium Phosphate Tribasic within Vitamin and Mineral Blend
  • Magnesium Phosphate within Vitamin and Mineral Blend
  • Calcium Lactate within Vitamin and Mineral Blend
  • L-Ascorbic Acid within Vitamin and Mineral Blend
  • Zinc Sulfate within Vitamin and Mineral Blend
  • DL-Alpha-Tocopheryl Acetate within Vitamin and Mineral Blend
  • Nicotinamide within Vitamin and Mineral Blend
  • Ferric Pyrophosphate within Vitamin and Mineral Blend
  • Manganese Sulfate within Vitamin and Mineral Blend
  • Calcium D-Pantothenate within Vitamin and Mineral Blend
  • Pyridoxine Hydrochloride within Vitamin and Mineral Blend
  • Riboflavin within Vitamin and Mineral Blend
  • Thiamine Mononitrate within Vitamin and Mineral Blend
  • Retinyl Palmitate within Vitamin and Mineral Blend
  • Folic Acid within Vitamin and Mineral Blend
  • D-Biotin within Vitamin and Mineral Blend
  • Potassium Iodide within Vitamin and Mineral Blend
  • Chromium Chloride within Vitamin and Mineral Blend
  • Sodium Molybdate within Vitamin and Mineral Blend
  • Sodium Selenite within Vitamin and Mineral Blend
  • Ergocalciferol within Vitamin and Mineral Blend
  • Cyanocobalamin within Vitamin and Mineral Blend
  • 9.
    L-Choline Bitartrate
  • 10.
    Sweetener
    Acesulfame potassium (INS 950)
    Sweetener (INS 950)
  • 11.
    Inositol
  • 12.
    Medium Chain Triglycerides Powder

In label order — normally largest quantity first. Select a row for the full write-up and sources.

These are major food allergens named on the ingredient list. They are a risk only to people allergic to them — not a general-population safety issue — so they do not lower the safety score. Anyone with the allergy should avoid this product, and check the pack’s own allergen statement.

Milk Allergen on the label: Whey Protein Concentrate, Calcium Caseinate, Whey Powder
Allergen
Soy Allergen on the label: the pack’s allergen statement
Allergen

The label declares each of these as a blend and then lists what is in it. The components appear in the groups above on their own merits, so the blend itself is shown here rather than counted a second time.

Learn More

Google Wikipedia EWG Skin Deep Open Food Facts
Nutrition (per 100 g)
Energy 372 kcal
Protein 76 g
Carbohydrate 69 g
Total Sugars 6 g
Added Sugars 0 g
Total Fat 0.6 g
Saturated Fat 0.4 g
Trans Fat 0 g
Dietary Fibre 0.6 g
Sodium 163 mg
Cholesterol 43 mg
Potassium 434 mg
Vitamin A 37 µg
Thiamine 0.04 mg
Riboflavin 0.06 mg
Niacin 0.6 mg
Folic Acid 20 µg
Vitamin B6 0.1 mg
Vitamin B12 0.6 µg
Biotin 9 µg
Pantothenic Acid 0.6 mg
Vitamin C 1 mg
Vitamin D 2 µg
Vitamin E 1 mg
Calcium 171 mg
Chromium 10 µg
Iron 0.3 mg
Iodine 15 µg
Magnesium 15 mg
Manganese 0.2 mg
Molybdenum 7 µg
Phosphorus 108 mg
Selenium 12 µg
Zinc 0.6 mg
Creatine 0.3 g
L-Glutamine 0.3 g
Choline 75 mg
Inositol 75 mg

Colour shows the per-100g level (green = low, amber = moderate, red = high), from the product's label.

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What are the ingredients in Serious Mass Chocolate Flavour?

The label of Serious Mass Chocolate Flavour lists 38 ingredients, in label order: Maltodextrin, Protein blend, Whey Protein Concentrate, Calcium Caseinate, Whey Powder, Emulsifier, Cocoa powder, Artificial Flavours, Creatine Monohydrate, L-Glutamine, Vitamin and Mineral Blend, Sodium Chloride, Calcium Phosphate Tribasic, Magnesium Phosphate, Calcium lactate, L-Ascorbic Acid, Zinc sulfate, DL-Alpha-Tocopheryl Acetate, Nicotinamide, Ferric pyrophosphate, Manganese sulphate, Calcium D-Pantothenate, Pyridoxine hydrochloride, Riboflavin, Thiamine Mononitrate, Retinyl Palmitate, Folic acid, D-Biotin, Potassium iodide, Chromium Chloride, Sodium molybdate, Sodium selenite, Ergocalciferol, Cyanocobalamin, L-Choline Bitartrate, Sweetener, Inositol, Medium Chain Triglycerides Powder. Flagged by the analysis: Sweetener.

Is Serious Mass Chocolate Flavour safe to eat?

Serious Mass Chocolate Flavour scores 6.0/10 on Decode Label (Moderate). This adult sports supplement provides a blend of proteins, vitamins, and minerals, with maltodextrin as the main carbohydrate. It contains artificial flavors and the intense sweetener acesulfame potassium, which are common in such products but may be a concern for those avoiding artificial additives. It is not intended for children.

Why does Serious Mass Chocolate Flavour score 6.0/10?

Flagged in the score: Contains artificial flavors and an artificial sweetener (acesulfame potassium). Also noted: High maltodextrin content (75%) as the primary carbohydrate source.

Who should avoid Serious Mass Chocolate Flavour?

The points the analysis notes are most relevant to: Avoiding artificial sweeteners; Sensitive to artificial flavors; Milk allergy / lactose intolerance.

Does Serious Mass Chocolate Flavour contain allergens?

Yes — the ingredient list contains milk (Whey Protein Concentrate, Calcium Caseinate and Whey Powder) and soy (the pack’s allergen statement). Check the allergen statement on the pack too if you have a diagnosed allergy.

Does Serious Mass Chocolate Flavour contain milk?

Yes — the ingredient list names Whey Protein Concentrate, Calcium Caseinate and Whey Powder. People with milk allergy / lactose intolerance should treat it as containing milk, and check the allergen statement on the pack too.

Does Serious Mass Chocolate Flavour contain soy?

Yes — the ingredient list names the pack’s allergen statement. People with soy allergy should treat it as containing soy, and check the allergen statement on the pack too.

How much sugar is in Serious Mass Chocolate Flavour?

6 g of total sugar per 100 g. The label declares 0 g of that as added sugar per 100 g.

Are the claims on the Serious Mass Chocolate Flavour pack accurate?

Decode Label checked 9 claims against the ingredient list and nutrition panel. "100% AUTHENTIC" — can't be verified from the label. "1,243 CALORIES" — can't be verified from the label. "50g PROTEIN" — can't be verified from the label.

Is Serious Mass Chocolate Flavour vegetarian?

Serious Mass Chocolate Flavour is marked vegetarian.

Answers are generated from this product's own Decode Label analysis — the score, the ingredient list and the label claims shown above. Always check the pack itself for allergen and dietary information.

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About this analysis: Based on declared label information and available evidence. Decode Label does not independently laboratory-test products, and a score is not a regulatory determination or medical advice.

Disclaimer: Safety scores are Decode Label-generated assessments based on publicly available regulatory data (FSSAI, WHO, EFSA, IARC) and peer-reviewed research. They are not a substitute for professional medical advice, and they are not a regulatory determination, a laboratory safety certification or a medical diagnosis. Ingredient safety can vary by individual health conditions, concentration, and usage context. Decode Label is an independent information service and scores every brand by the same rules. No brand pays for or influences its score. Our founder also founded the personal-care brand Botani Bestie (see our story); its products are scored exactly like everyone else's. Data limitations: This assessment is based on the information declared on the product label and the evidence sources above — Decode Label does not independently laboratory-test this product. Ingredient concentrations, sourcing and manufacturing can vary between batches and are not always disclosed. A finding that is not shown here means it was not identified from the available label information, not that it has been ruled out.

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