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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

Non-veg supplement
5.0 Moderate

Decode Label Safety Score

Nutrition · 40% 2.0/10
Ingredient safety · 30% 9.7/10
Processing · 20% 4.5/10
Marketing · 10% 4.9/10
How we got 5.0 Show
Weighted score 5.1/10
Score limited by a dominant nutrition concern. 5.0
Also flagged
Contains an intense artificial sweetener (sucralose). Sweeteners are judged by name, and a protein powder is not exempt
Final score 5.0/10 · Moderate

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

This adult sports-nutrition supplement provides a substantial protein blend and a comprehensive array of vitamins and minerals. The primary concern for regular users is the presence of two intense artificial sweeteners, Sucralose and Acesulfame Potassium, which are listed as ingredients and are the dominant flavor components alongside natural and artificial flavors. While generally recognized as safe for consumption, long-term effects of regular intake of these sweeteners are still a subject of ongoing research. Individuals who prefer to avoid artificial sweeteners should consider alternative products.

At a glance

From the declared label — not a lab test

Findings to weigh

Ingredient · worth noting Sucralose Intense artificial sweetener - long-term effects of regular use are not settled → Ingredient · worth noting Acesulfame Potassium Intense artificial sweetener - long-term effects of regular use are not settled → Declared allergens Egg + 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
  • Egg Albumin
  • Magnesium Phosphate
  • Ferric pyrophosphate
  • +23 more →

Adult protein supplement with artificial sweeteners and comprehensive micronutrients

This protein supplement is formulated for adults, providing a blend of proteins, vitamins, and minerals. It contains both natural and artificial flavors, along with two intense artificial sweeteners, Sucralose and Acesulfame Potassium. While these sweeteners are approved for use, some individuals may prefer to limit their intake due to ongoing discussions about their long-term health effects.

Okay for: Healthy adults seeking protein and micronutrient support

Declared allergens: Egg, Milk and Soy

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

People with these allergies should avoid it and check the pack’s own allergen statement.

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: Nutrition profile Sucralose Acesulfame Potassium

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
Excess Sodium & Salt Moderate concern · 5.0/10
Fillers & Additive Burden Moderate concern · 5.0/10
Banned & Adulterant Risk Minor concern · 6.5/10
Added & Hidden Sugar Minor concern · 7.5/10
Micronutrient Overdose No concern identified · 8.0/10
Stimulant Load No concern identified · 8.0/10
Artificial Colours & Dyes No concern identified · 8.0/10

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 (sucralose). 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-quality protein blend (Whey Protein Concentrate, Calcium Caseinate, Egg Albumin)

Comprehensive vitamin and mineral blend for micronutrient support

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

Watch out for

Contains 'Natural and Artificial Flavor', indicating the presence of synthetic flavoring compounds.

Contains two intense artificial sweeteners (Sucralose, Acesulfame Potassium) which some individuals prefer to avoid.

Ingredient Concerns safety database

Sources cited below may be Indian (FSSAI) or international (EU, US, WHO, IARC) — an international classification or law is evidence, not an Indian regulatory finding.

Sucralose (E955)

Sucralose is an approved intense sweetener with an established acceptable daily intake. The WHO (2023) advises against relying on non-sugar sweeteners for weight control, and research into long-term gut and metabolic effects is ongoing. Heating it at very high temperatures is not recommended.

Regulatory & scientific authority Source: WHO guideline on non-sugar sweeteners (2023); EFSA/JECFA acceptable daily intake

Sucralose: regulation, sources and other products →

Acesulfame Potassium (E950)

Acesulfame K is an approved intense sweetener. Regulators set an acceptable daily intake and consider it safe within it, but the WHO (2023) advises against using non-sugar sweeteners to control body weight because there is no long-term benefit and possible long-term harms, and long-term research on gut and metabolic effects is still developing.

Regulatory & scientific authority Source: WHO guideline on non-sugar sweeteners (2023); EFSA/JECFA acceptable daily intake

Acesulfame Potassium: regulation, sources and other products →

Decode Label Analysis

Contains Sucralose, an intense artificial sweetener. While approved for use, long-term effects of regular consumption are a subject of ongoing research.

Contains Acesulfame Potassium, an intense artificial sweetener. While approved for use, long-term effects of regular consumption are a subject of ongoing research.

Claim check

1 claim not supported by label data

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.

!
"High Protein" Not supported by label data

Protein provides only 16.1% of energy — enough for a “source of protein” (10%) but below the 20% a “high protein” claim requires. (Judged on % of energy, not % by weight.)

Protein 15 g Energy 372 kcal 16.1% of energy from protein
?
"Muscle Building & Weight Gain Formula" Can't verify

The claim 'Muscle Building & Weight Gain Formula' is a functional claim that cannot be verified from the ingredient list or nutrition facts alone.

?
"Helps build and maintain muscle" Can't verify

The claim 'Helps build and maintain muscle' is a functional claim that cannot be verified from the ingredient list or nutrition facts alone.

?
"Helps fuel intense workouts" Can't verify

The claim 'Helps fuel intense workouts' is a functional claim that cannot be verified from the ingredient list or nutrition facts alone.

§
"Food for Special Dietary Use" Regulatory designation

This is the product’s regulatory food-category / usage designation (e.g. a Food for Special Dietary Use classification or a mandated “use under medical advice” direction) — printed because regulation requires it, not a benefit claim. An ingredient list can’t confirm or deny it, s

?
"Food for Weight Gain" Can't verify

The designation 'Food for Weight Gain' is a regulatory classification that cannot be verified from the ingredient list or nutrition facts.

?
"Taken over and above the usual diet in addition to normal calorie intake and regular weight resistance training" Can't verify

This statement describes usage instructions and context, which cannot be verified from the ingredient list or nutrition facts.

?
"100% Authentic" Can't verify

The claim '100% Authentic' refers to the product's genuineness and cannot be verified from the ingredient list or nutrition facts.

✓
"1,243 Calories" Checks out

The product provides 1243 calories per serving (334g), which is calculated from 372 kcal per 100g.

energy kcal 372 (per 100g) serving size: 334 g
✓
"Helps boost calorie intake" Checks out

The product provides 1243 calories per serving, which can help boost calorie intake.

energy kcal 372 (per 100g) serving size: 334 g
✓
"50g Protein" Checks out

The product contains 50.1g of protein per serving (334g), calculated from 15g per 100g.

protein g 15 (per 100g) serving size: 334 g

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
  • 2.
    Protein Blend 18%
    Protein Blend (18%)
  • Whey Protein Concentrate within Protein Blend
  • Calcium Caseinate within Protein Blend
  • Egg Albumin within Protein Blend
  • 3.
    Cocoa Powder
    Cocoa Powder (Processed with Alkali)
  • 4.
    Natural and Artificial Flavor
  • 5.
    Mineral Blend
  • Sodium Chloride within Mineral Blend
  • Magnesium Phosphate within Mineral Blend
  • Ferric Pyrophosphate within Mineral Blend
  • Zinc Oxide within Mineral Blend
  • Copper Gluconate within Mineral Blend
  • Manganese Sulphate within Mineral Blend
  • Chromium Picolinate within Mineral Blend
  • Potassium Iodide within Mineral Blend
  • Sodium Molybdate within Mineral Blend
  • Sodium Selenite within Mineral Blend
  • 6.
    Vitamin Blend
  • L-Ascorbic Acid within Vitamin Blend
  • DL-Alpha Tocopheryl Acetate within Vitamin Blend
  • Niacinamide within Vitamin Blend
  • Retinyl Palmitate within Vitamin Blend
  • Folic Acid within Vitamin Blend
  • Biotin within Vitamin Blend
  • D-Calcium Pantothenate within Vitamin Blend
  • Cholecalciferol within Vitamin Blend
  • Pyridoxine Hydrochloride within Vitamin Blend
  • Thiamine Mononitrate within Vitamin Blend
  • Riboflavin within Vitamin Blend
  • Cyanocobalamin within Vitamin Blend
  • 7.
    Lecithin
  • 8.
    Creatine Monohydrate
  • 9.
    L-Glutamine
  • 10.
    Choline Bitartrate
  • 11.
    Inositol
  • 12.
    Sucralose
  • 13.
    Acesulfame Potassium

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.

Egg Allergen on the label: Egg Albumin
Allergen
Milk Allergen on the label: Whey Protein Concentrate, Calcium Caseinate
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) Serving: 334 g (About 2 Scoops)
Energy 372 kcal
Protein 15 g
Carbohydrate 76 g
Total Sugars 6 g
Added Sugars 0 g
Total Fat 0.6 g
Saturated Fat 0.3 g
Trans Fat 0 g
Sodium 163 mg
Cholesterol 43 mg
Potassium 130 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 5 µg
Iron 0.3 mg
Iodide 15 µg
Magnesium 15 mg
Manganese 0.2 mg
Molybdenum 13 µg
Phosphorus 108 mg
Selenium 12 µg
Zinc 0.6 mg
Creatine 1 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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Optimum Nutrition (ON) Gold Standard 100%

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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, Egg Albumin, Cocoa powder, Natural and Artificial Flavor, Mineral Blend, Sodium Chloride, Magnesium Phosphate, Ferric pyrophosphate, ZINC OXIDE, Copper Gluconate, Manganese sulphate, Chromium Picolinate, Potassium iodide, Sodium molybdate, Sodium selenite, Vitamin Blend, L-Ascorbic Acid, DL-alpha tocopheryl acetate, Niacinamide, Retinyl Palmitate, Folic acid, Biotin, D-Calcium Pantothenate, Cholecalciferol, Pyridoxine hydrochloride, Thiamine Mononitrate, Riboflavin, Cyanocobalamin, Lecithin, Creatine Monohydrate, L-Glutamine, Choline bitartrate, Inositol, Sucralose, Acesulfame Potassium. Flagged by the analysis: Sucralose, Acesulfame Potassium.

Is Serious Mass Chocolate Flavour safe to eat?

Serious Mass Chocolate Flavour scores 5.0/10 on Decode Label (Moderate). This protein supplement is formulated for adults, providing a blend of proteins, vitamins, and minerals. It contains both natural and artificial flavors, along with two intense artificial sweeteners, Sucralose and Acesulfame Potassium. While these sweeteners are approved for use, some individuals may prefer to limit their intake due to ongoing discussions about their long-term health effects.

Why does Serious Mass Chocolate Flavour score 5.0/10?

Flagged in the score: Contains two intense artificial sweeteners (Sucralose, Acesulfame Potassium) which some individuals prefer to avoid. Also noted: Contains 'Natural and Artificial Flavor', indicating the presence of synthetic flavoring compounds.

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; Egg allergy.

Does Serious Mass Chocolate Flavour contain allergens?

Yes — the ingredient list contains milk (Whey Protein Concentrate and Calcium Caseinate), egg (Egg Albumin) 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 and Calcium Caseinate. 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 egg?

Yes — the ingredient list names Egg Albumin. People with egg allergy should treat it as containing egg, 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 11 claims against the ingredient list and nutrition panel. "High Protein" — misleading. "Muscle Building & Weight Gain Formula" — can't be verified from the label. "Helps build and maintain muscle" — can't be verified from the label.

Is Serious Mass Chocolate Flavour vegetarian?

Serious Mass Chocolate Flavour is marked non-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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