Serious Mass Chocolate Flavour by Optimum Nutrition — product pack

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Optimum Nutrition

Brand owned by Glanbia (Ireland) · about the brand

Serious Mass Chocolate Flavour

Non-veg supplement
3.5 Concerning

Decode Label Safety Score

Nutrition · 40% 0.5/10
Ingredient safety · 30% 9.4/10
Processing · 20% 4.5/10
Marketing · 10% 5.5/10
How we got 3.5 Show
Weighted score 4.5/10
Score limited by a dominant nutrition concern. 3.5
Also flagged
Contains an intense artificial sweetener (sucralose). Sweeteners are judged by name, and a protein powder is not exempt
Final score 3.5/10 · Concerning

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

The score is held down by this product's nutrition profile, which dominates the assessment regardless of the rest of the formulation. This adult meal replacement provides a comprehensive blend of proteins, vitamins, and minerals, designed to support weight management or dietary needs. The primary concerns are the inclusion of artificial sweeteners, sucralose and acesulfame potassium, whose long-term effects are still under scientific review. Additionally, the phosphate and potassium content from Dipotassium Phosphate warrants caution for individuals with kidney conditions, as their ability to process these minerals may be impaired. Despite these caveats, it serves its intended purpose as a fortified meal replacement for adults under appropriate supervision.

Adult meal replacement with artificial sweeteners and phosphate additives

The score is held down by this product's nutrition profile, which dominates the assessment regardless of the rest of the formulation. This meal replacement is formulated for adults, providing a full spectrum of proteins, vitamins, and minerals. It contains artificial sweeteners, sucralose and acesulfame potassium, which are subjects of ongoing research regarding their long-term health effects. Individuals with kidney conditions should be cautious due to the presence of Dipotassium Phosphate, which contributes to the product's phosphate and potassium load.

Okay for: Healthy adults seeking a meal replacement

Declared allergens: Egg, Milk and Soy

Egg· Egg Albumin Milk· Whey Protein Concentrate, Calcium Caseinate Soy· Soy lecithin

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

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.

nutritional_value Major concern · 0.5/10
Artificial Sweeteners Significant concern · 3.5/10
Excess Sodium & Salt Moderate concern · 5.0/10
Fillers & Additive Burden Moderate concern · 5.0/10
Added & Hidden Sugar Minor concern · 7.5/10
Micronutrient Overdose No concern identified · 8.0/10
Artificial Colours & Dyes No concern identified · 8.0/10
unhealthy_fats No concern identified · 9.0/10

Saturated fat 1.5 g per 100 g/ml

Other audiences

Avoid
Not intended for children

This is a weight-management meal replacement (Food for Special Dietary Use), formulated for adults. It is not intended for infants or children, and the pack directs that it be used under medical or dietary supervision.

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

Comprehensive protein blend for sustained release and muscle support

Fortified with a wide range of essential vitamins and minerals

Includes beneficial amino acids like Creatine, L-Glutamine, and BCAAs

Contains Medium Chain Triglycerides for easily accessible energy

Watch out for

Presence of artificial flavours

Contains artificial sweeteners (Sucralose, Acesulfame Potassium) with ongoing research into long-term effects

Dipotassium Phosphate may be a concern for individuals with kidney conditions

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 →

Dipotassium Phosphate (E340)

Used as an emulsifier and stabiliser. Adds both phosphate and potassium load, which patients with kidney disease or hyperkalaemia need to monitor closely.

Regulatory & scientific authority Source: FSSAI INS 340

Dipotassium Phosphate: regulation, sources and other products →

Decode Label Analysis

Contains Sucralose, an intense artificial sweetener. Long-term effects of regular use are not settled.

Contains Acesulfame Potassium, an intense artificial sweetener. Long-term effects of regular use are not settled.

Contains Dipotassium Phosphate, a phosphate and potassium additive. EFSA's group ADI for phosphates explicitly does not apply to people with moderate-to-severe reduced kidney function, who may not tolerate ADI-level phosphate intake. Caution for kidney patients.

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% 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 375 kcal 16% of energy from protein
?
"100% AUTHENTIC" Can't verify

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

?
"MUSCLE BUILDING & WEIGHT GAIN FORMULA" Can't verify

Muscle building and weight gain are benefit claims that cannot be verified from the ingredient list or nutrition panel alone.

?
"HELPS BUILD AND MAINTAIN MUSCLE" Can't verify

Building and maintaining muscle are benefit claims that cannot be verified from the ingredient list or nutrition panel alone.

?
"HELPS FUEL INTENSE WORKOUTS" Can't verify

Fueling intense workouts is a benefit claim that cannot be verified from the ingredient list or nutrition panel alone.

§
"FOOD FOR SPECIAL DIETARY USE - FOOD FOR WEIGHT GAIN" 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

✓
"1,251 CALORIES!" Checks out

The product provides 1251 calories per serving (334g), calculated from 375 kcal per 100g.

energy kcal 375 (per 100g) serving size: 334 g
✓
"HELPS BOOST CALORIE INTAKE" Checks out

The product provides 1251 calories per serving, which helps boost calorie intake.

energy kcal 375 (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
✓
"256g CARBS" Checks out

The product contains 256.5g of carbohydrates per serving (334g), calculated from the total energy and other macronutrients.

energy kcal 375 (per 100g) protein g 15 (per 100g) fat g 3 (per 100g) serving size: 334 g
✓
"POWDERED PROTEIN & CARBOHYDRATE DRINK MIX" Checks out

The ingredients list protein blend and maltodextrin (a carbohydrate), confirming it is a powdered protein and carbohydrate drink mix.

Maltodextrin Protein Blend (18%)

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

43 entries as printed on the label · 42 distinct ingredients (some are declared more than once).

  • 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
  • Sweet Dairy Whey within Protein Blend
  • 3.
    Artificial Flavor
    Artificial Flavor (Vanilla)
  • 4.
    Cocoa Powder
    Cocoa Powder (Processed with Alkali)
  • 5.
    Medium Chain Triglycerides
  • 6.
    Creatine Monohydrate
  • 7.
    L-Glutamine
  • 8.
    L-Arginine
  • 9.
    L-Leucine
  • 10.
    L-Isoleucine
  • 11.
    L-Valine
  • 12.
    Vitamin and Mineral Blend
    Vitamin and Mineral Blend (DiPotassium Phosphate, Magnesium Aspartate, Calcium Carbonate, TriCalcium Phosphate, Maltodextrin, Ascorbic Acid, Ferric Orthophosphate, Vitamin E Acetate, Niacinamide, Zinc Oxide, Copper Gluconate, D-Calcium Pantothenate, Manganese Sulphate, Pyridoxine Hydrochloride, Thiamin Hydrochloride, Vitamin A Acetate, Riboflavin, Chromium Picolinate, Folic Acid, Biotin, Potassium Iodide, Molybdenum Chelate, Sodium Selenite, Cyanocobalamin)
  • Dipotassium Phosphate within Vitamin and Mineral Blend
    DiPotassium Phosphate
  • Magnesium Aspartate within Vitamin and Mineral Blend
  • Calcium Carbonate within Vitamin and Mineral Blend
  • Tricalcium Phosphate within Vitamin and Mineral Blend
    TriCalcium Phosphate
  • Maltodextrin within Vitamin and Mineral Blend
  • Ascorbic Acid within Vitamin and Mineral Blend
  • Ferric Orthophosphate within Vitamin and Mineral Blend
  • Vitamin E Acetate within Vitamin and Mineral Blend
  • Niacinamide within Vitamin and Mineral Blend
  • Zinc Oxide within Vitamin and Mineral Blend
  • Copper Gluconate within Vitamin and Mineral Blend
  • D-Calcium Pantothenate within Vitamin and Mineral Blend
  • Manganese Sulphate within Vitamin and Mineral Blend
  • Pyridoxine Hydrochloride within Vitamin and Mineral Blend
  • Thiamin Hydrochloride within Vitamin and Mineral Blend
  • Vitamin A Acetate within Vitamin and Mineral Blend
  • Riboflavin within Vitamin and Mineral Blend
  • Chromium Picolinate within Vitamin and Mineral Blend
  • Folic Acid within Vitamin and Mineral Blend
  • Biotin within Vitamin and Mineral Blend
  • Potassium Iodide within Vitamin and Mineral Blend
  • Molybdenum Chelate within Vitamin and Mineral Blend
  • Sodium Selenite within Vitamin and Mineral Blend
  • Cyanocobalamin within Vitamin and Mineral Blend
  • 13.
    Soy Lecithin
  • 14.
    Sucralose
  • 15.
    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, Sweet Dairy Whey
Allergen
Soy Allergen on the label: Soy lecithin
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.

Nutrition (per 100 g) Serving: 334 g
Energy 375 kcal
Protein 15 g
Carbohydrate 77 g
Total Sugars 9 g
Total Fat 3 g
Saturated Fat 1.5 g
Sodium 163 mg
Cholesterol 43 mg
Potassium 144 mg
Vitamin A 130 mcg
Vitamin C 15 mg
Calcium 171 mg
Iron 3.5 mg
Vitamin D 0.6 mcg
Vitamin E 1.5 mg
Thiamin 0.2 mg
Riboflavin 0.2 mg
Niacin 2.4 mg
Vitamin B6 0.2 mg
Folic Acid 30 mcg
Vitamin B12 0.3 mcg
Biotin 7.5 mcg
Pantothenic Acid 0.9 mg
Phosphorus 130 mg
Iodine 30 mcg
Magnesium 30 mg
Zinc 3 mg
Selenium 8.3 mcg
Copper 0.2 mg
Manganese 0.3 mg
Chromium 15 mcg
Molybdenum 11 mcg
Chloride 100 mg
Creatine Monohydrate 1.5 g
L-Glutamine 0.9 g
Choline 39 mg
Inositol 39 mg

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

What are the ingredients in Serious Mass Chocolate Flavour?

The label of Serious Mass Chocolate Flavour lists 42 ingredients, in label order: Protein blend, Whey Protein Concentrate, Calcium Caseinate, Egg Albumin, Sweet Dairy Whey, Artificial Flavours, Cocoa powder, Medium Chain Triglycerides, Creatine Monohydrate, L-Glutamine, L-Arginine, L-Leucine, L-Isoleucine, L-Valine, Vitamin and Mineral Blend, Dipotassium Phosphate, Magnesium Aspartate, Calcium Carbonate, Tricalcium Phosphate, Maltodextrin, Ascorbic acid, Ferric Orthophosphate, Vitamin E Acetate, Niacinamide, ZINC OXIDE, Copper Gluconate, D-Calcium Pantothenate, Manganese sulphate, Pyridoxine hydrochloride, Thiamin Hydrochloride, Vitamin A Acetate, Riboflavin, Chromium Picolinate, Folic acid, Biotin, Potassium iodide, Molybdenum Chelate, Sodium selenite, Cyanocobalamin, Soy lecithin, and 2 more. Flagged by the analysis: Dipotassium Phosphate, Sucralose, Acesulfame Potassium.

Is Serious Mass Chocolate Flavour safe to eat?

Serious Mass Chocolate Flavour scores 3.5/10 on Decode Label (Concerning). The score is held down by this product's nutrition profile, which dominates the assessment regardless of the rest of the formulation. This meal replacement is formulated for adults, providing a full spectrum of proteins, vitamins, and minerals. It contains artificial sweeteners, sucralose and acesulfame potassium, which are subjects of ongoing research regarding their long-term health effects. Individuals with kidney conditions should be cautious due to the presence of Dipotassium Phosphate, which contributes to the product's phosphate and potassium load.

Why does Serious Mass Chocolate Flavour score 3.5/10?

Flagged in the score: Contains artificial sweeteners (Sucralose, Acesulfame Potassium) with ongoing research into long-term effects. Dipotassium Phosphate may be a concern for individuals with kidney conditions. Also noted: Presence of artificial flavours.

Who should avoid Serious Mass Chocolate Flavour?

The points the analysis notes are most relevant to: Avoiding artificial sweeteners (sucralose, acesulfame potassium); Kidney conditions (due to phosphate and potassium content); Milk allergy / lactose intolerance; Egg allergy; Soy allergy.

Does Serious Mass Chocolate Flavour contain allergens?

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

9 g of total sugar per 100 g. The label does not declare added sugar separately, so we cannot say how much of it is added.

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. "100% AUTHENTIC" — can't be verified from the label. "MUSCLE BUILDING & WEIGHT GAIN FORMULA" — 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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