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Serious Mass Vanilla 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 Vanilla Flavour

Non-veg supplement
5.5 Moderate

Decode Label Safety Score

Nutrition · 40% 2.8/10
Ingredient safety · 30% 10.0/10
Processing · 20% 4.5/10
Marketing · 10% 5.5/10
How we got 5.5 Show
Weighted score 5.6/10
Capped — Flavours not disclosed — the label does not say which substance this is ≤ 5.5
Also flagged
Contains an intense artificial sweetener (named by INS code). Sweeteners are judged by name, and a protein powder is not exempt
Final score 5.5/10 · Moderate

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

This adult sports-nutrition supplement is primarily composed of maltodextrin and a protein blend, providing a significant source of carbohydrates and protein. The product includes a comprehensive vitamin and mineral blend, which is beneficial for overall nutritional support. The high maltodextrin content means it is a high-carbohydrate product, which is relevant for those managing carbohydrate intake.

At a glance

From the declared label — not a lab test

Findings to weigh

Score limiter Flavours not disclosed — the label does not say which substance this is See which concerns held the score down. → 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
  • Creatine Monohydrate
  • L-Glutamine
  • +22 more →

High carbohydrate and protein content.

This supplement provides a substantial amount of carbohydrates from maltodextrin and protein from various sources, along with a wide range of vitamins and minerals. It is formulated for adults and not intended for children.

Okay for: Healthy adults seeking carbohydrate and protein supplementation Individuals looking for vitamin and mineral fortification

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: Flavours not disclosed — the label does not say which substance this is

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
Excess Sodium & Salt Minor concern · 7.0/10
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

Flavours not disclosed — the label does not say which substance this is

Rule F-CAP-13

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 multiple sources (whey, casein, egg)

Includes creatine and glutamine for exercise performance and recovery

Fortified with a comprehensive blend of essential vitamins and minerals

Contains Medium Chain Triglycerides (MCTs) for quick energy

Watch out for

Undisclosed 'Flavours' reduce transparency

Contains artificial sweetener (Acesulfame Potassium)

High maltodextrin content contributes to a high carbohydrate load

Contains common allergens: milk and egg

Decode Label Analysis

Contains undisclosed 'Flavours'. Consumers with sensitivities or those who prefer full transparency regarding flavouring agents should be aware.

Contains Acesulfame Potassium (INS 950), an artificial sweetener. While generally recognized as safe, some individuals may choose to limit or avoid artificial sweeteners.

Contains milk and egg derivatives (Whey Protein Concentrate, Calcium Caseinate, Egg Albumin, Whey Powder, Whey Permeate, Milk Mineral Complex), which are common allergens.

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
?
"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

The claim of being a 'muscle building & weight gain formula' is a functional benefit that cannot be verified from the ingredient list or nutrition panel alone.

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

The claim of helping to build and maintain muscle is a functional benefit that cannot be verified from the ingredient list or nutrition panel alone.

?
"HELPS FUEL INTENSE WORKOUTS" Can't verify

The claim of helping to fuel intense workouts is a functional benefit 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

✓
"1,243 CALORIES" Checks out

The product provides 1243 calories per serving (334g), 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
✓
"254g CARBS" Checks out

The product contains 254.4g of carbohydrates per serving (334g), calculated from the maltodextrin content and other ingredients.

Maltodextrin (77%) serving size: 334 g
✓
"ADDED SUGAR 0g" Checks out

The nutrition panel states 0g of added sugar per 100g.

added sugar g 0 (per 100g)

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

  • Maltodextrin 77% within Protein Blend
    Maltodextrin (77%)
  • 1.
    Protein Blend 19%
    Protein Blend (19%)
  • Whey Protein Concentrate within Protein Blend
  • Calcium Caseinate within Protein Blend
  • Egg Albumin within Protein Blend
  • Whey Powder within Protein Blend
  • 2.
    Creatine Monohydrate
  • 3.
    L-Glutamine
  • 4.
    L-Glutamine Peptides
  • 5.
    Whey Permeate
  • 6.
    Milk Mineral Complex
  • 7.
    Medium Chain Triglycerides Powder
  • 8.
    Flavour undisclosed flavouring
  • 9.
    Vitamin and Mineral Blend
  • L-Ascorbic Acid within Vitamin and Mineral Blend
  • Ferric Pyrophosphate within Vitamin and Mineral Blend
  • Manganese Sulphate within Vitamin and Mineral Blend
  • D-Alpha Tocopheryl Acetate within Vitamin and Mineral Blend
  • Niacinamide within Vitamin and Mineral Blend
  • Zinc Oxide within Vitamin and Mineral Blend
  • Retinyl Acetate within Vitamin and Mineral Blend
  • D-Calcium Pantothenate within Vitamin and Mineral Blend
  • Cholecalciferol within Vitamin and Mineral Blend
  • Pyridoxine Hydrochloride within Vitamin and Mineral Blend
  • Thiamine Mononitrate 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
  • Cyanocobalamin within Vitamin and Mineral Blend
  • 10.
    L-Choline Bitartrate
  • 11.
    Inositol
  • 12.
    Sweetener
    Acesulfame potassium (INS 950)
    Sweetener (INS 950)

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, 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) 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 0.9 g
Saturated Fat 0.6 g
Trans Fat 0 g
Sodium 139 mg
Cholesterol 45 mg
Potassium 318 mg
Vitamin A 0.04 mg
Thiamine 0.01 mg
Riboflavin 0.01 mg
Niacin 0.6 mg
Folic Acid 20 µg
Vitamin B6 0.09 mg
Vitamin B12 0.3 µg
Biotin 9 µg
Pantothenic Acid 0.6 mg
Vitamin C 2 mg
Vitamin D 0.9 µg
Vitamin E 0.9 mg
Calcium 171 mg
Chromium 10 µg
Iron 1.8 mg
Iodide 15 µg
Magnesium 15 mg
Manganese 0.2 mg
Molybdenum 4 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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What are the ingredients in Serious Mass Vanilla Flavour?

The label of Serious Mass Vanilla Flavour lists 34 ingredients, in label order: Maltodextrin, Protein blend, Whey Protein Concentrate, Calcium Caseinate, Egg Albumin, Whey Powder, Creatine Monohydrate, L-Glutamine, L-Glutamine Peptides, Whey Permeate, Milk Mineral Complex, Medium Chain Triglycerides Powder, Flavours, Vitamin and Mineral Blend, L-Ascorbic Acid, Ferric pyrophosphate, Manganese sulphate, D-Alpha Tocopheryl Acetate, Niacinamide, ZINC OXIDE, Retinyl acetate, D-Calcium Pantothenate, Cholecalciferol, Pyridoxine hydrochloride, Thiamine Mononitrate, Riboflavin, Chromium Picolinate, Folic acid, Biotin, Potassium iodide, Cyanocobalamin, L-Choline Bitartrate, Inositol, Sweetener. Flagged by the analysis: Sweetener.

Is Serious Mass Vanilla Flavour safe to eat?

Serious Mass Vanilla Flavour scores 5.5/10 on Decode Label (Moderate). This supplement provides a substantial amount of carbohydrates from maltodextrin and protein from various sources, along with a wide range of vitamins and minerals. It is formulated for adults and not intended for children.

Why does Serious Mass Vanilla Flavour score 5.5/10?

Flagged in the score: Contains artificial sweetener (Acesulfame Potassium). Also noted: Undisclosed 'Flavours' reduce transparency. High maltodextrin content contributes to a high carbohydrate load.

Who should avoid Serious Mass Vanilla Flavour?

The points the analysis notes are most relevant to: Avoiding artificial sweeteners; Sensitive to undisclosed flavouring agents; Managing carbohydrate intake; Milk allergy / lactose intolerance; Egg allergy.

Does Serious Mass Vanilla Flavour contain allergens?

Yes — the ingredient list contains milk (Whey Protein Concentrate, Calcium Caseinate, Whey Powder and Whey Permeate), 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 Vanilla Flavour contain milk?

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

Does Serious Mass Vanilla 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 Vanilla 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 Vanilla 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 Vanilla 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 Vanilla Flavour vegetarian?

Serious Mass Vanilla 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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