Decode Label Safe or Not? We Decode, You Decide.
Search Compare Why Decode Label How we score Our Story Our Team FAQ
Log in Submit a Product
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

Compare
Optimum Nutrition

Brand owned by Glanbia (Ireland) · about the brand

Serious Mass Vanilla Flavour

Non-veg supplement
6.0 Moderate

Decode Label Safety Score

Nutrition · 40% 10.0/10
Ingredient safety · 30% 10.0/10
Processing · 20% 4.5/10
Marketing · 10% 5.8/10
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 adult sports nutrition supplement provides a substantial protein and carbohydrate base, fortified with a comprehensive vitamin and mineral blend, creatine, and L-glutamine. The primary carbohydrate source is maltodextrin, which makes up the majority of the product. While it offers a wide array of micronutrients and performance-enhancing ingredients, the presence of artificial flavors and acesulfame potassium (an artificial sweetener) may be a consideration for those preferring to avoid such additives. The product is designed for adults and is not suitable for children.

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
  • Medium Chain Triglycerides Powder
  • L-Glutamine
  • +22 more →

High in carbohydrates and protein; contains artificial sweetener and flavors

This adult sports nutrition supplement is primarily composed of maltodextrin and a protein blend, providing energy and muscle support. It is fortified with numerous vitamins, minerals, creatine, and L-glutamine.

Okay for: Healthy adults seeking a protein and carbohydrate supplement Individuals looking for creatine and L-glutamine support

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
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
Excess Sodium & Salt No concern identified · 10.0/10

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 (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 whey and casein for varied absorption rates

Contains creatine monohydrate, a well-researched performance enhancer

Fortified with a comprehensive blend of essential vitamins and minerals

Includes L-Glutamine for muscle recovery support

Contains Medium Chain Triglycerides (MCTs) for quick energy

Watch out for

High carbohydrate content primarily from maltodextrin (77% of product)

Presence of artificial flavors

Contains the artificial sweetener acesulfame potassium (INS 950)

Decode Label Analysis

Contains artificial flavors, which some individuals may prefer to avoid.

Contains acesulfame potassium (INS 950), an artificial sweetener. While generally recognized as safe, some consumers choose to limit artificial sweetener intake.

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 quality claim that cannot be verified from the ingredient list or nutrition facts.

?
"1,243 CALORIES" Can't verify

The label states 372 kcal per 100g, and a serving size of 20g. The claim of 1,243 calories is not directly stated on the label for any specific serving size or per 100g, and cannot be derived from the provided nutrition information.

energy kcal 372 (per 100g) serving size: 20 g
?
"50g PROTEIN" Can't verify

The label states 76g of protein per 100g. With a serving size of 20g, this equates to 15.2g of protein per serving. The claim of 50g protein is not supported by the provided nutrition information for a standard serving or per 100g.

protein g 76 (per 100g) serving size: 20 g
?
"254g CARBS" Can't verify

The label does not explicitly state the total carbohydrate content per 100g or per serving. While maltodextrin is 77% of the product, a specific '254g Carbs' claim is not verifiable from the provided nutrition facts.

Maltodextrin (77%)
✓
"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
✓
"VANILLA FLAVOUR" Checks out

The ingredient list includes 'Artificial Flavor (Vanilla)', confirming the vanilla flavour.

Artificial Flavor (Vanilla)

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 77%
    Maltodextrin (77%)
  • 2.
    Protein Blend 19%
    Protein Blend (19%)
  • 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.
    Artificial Flavor
    Artificial Flavor (Vanilla)
  • 5.
    Creatine Monohydrate
  • 6.
    Medium Chain Triglycerides Powder
  • 7.
    L-Glutamine
  • 8.
    Vitamin and Mineral Blend
  • 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 Sulphate 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 Selenite within Vitamin and Mineral Blend
  • Ergocalciferol within Vitamin and Mineral Blend
  • 9.
    L-Choline Bitartrate
  • 10.
    Sweetener
    Acesulfame potassium (INS 950)
    Sweetener (INS 950)
  • 11.
    Inositol

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) Serving: 20 g
Energy 372 kcal
Protein 76 g
Carbohydrate 9 g
Total Sugars 6 g
Added Sugars 0 g
Total Fat 1 g
Saturated Fat 0.6 g
Trans Fat 0 g
Sodium 139 mg
Cholesterol 45 mg
Potassium 318 mg
Vitamin A 37 mcg
Thiamine 0.04 mg
Riboflavin 0.06 mg
Niacin 0.6 mg
Folic Acid 20 mcg
Vitamin B6 0.1 mg
Vitamin B12 0.6 mcg
Biotin 9 mcg
Pantothenic Acid 0.6 mg
Vitamin C 1 mg
Vitamin D 2 mcg
Vitamin E 0.9 mg
Calcium 171 mg
Chromium 10 mcg
Iron 0.3 mg
Iodide 15 mcg
Magnesium 15 mg
Manganese 0.2 mg
Molybdenum 13 mcg
Phosphorus 108 mg
Selenium 12 mcg
Zinc 0.6 mg
L-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.

Compare with other protein supplement products

Assessed using the same Decode Label methodology, sorted by score. Each score reflects the information available for that product at the time of assessment.

View all →
Gold Standard 100% Whey Unflavoured

Gold Standard 100% Whey Unflavoured

7.5

OPTIMUM NUTRITION.
Nutrabay Pure Pea Protein Isolate - 25.3g Protein, 5g BCAA

Nutrabay Pure Pea Protein Isolate - 25.3g Protein, 5g BCAA

7.5

Nutrabay
OZiva Protein & Herbs for Women (Chocolate)

OZiva Protein & Herbs for Women (Chocolate)

7.5

OZiva
Protinex Lite Zero Added Suger Vanilla Flaour

Protinex Lite Zero Added Suger Vanilla Flaour

6.5

Protinex
Optimum Nutrition (ON) Gold Standard 100%

Optimum Nutrition (ON) Gold Standard 100%

6.0

Optimum Nutrition

Also on this shelf

More Protein Supplement products we've analysed, in name order.

What are the ingredients in Serious Mass Vanilla Flavour?

The label of Serious Mass Vanilla Flavour lists 35 ingredients, in label order: Maltodextrin, Protein blend, Whey Protein Concentrate, Calcium Caseinate, Whey Powder, Emulsifier, Artificial Flavours, Creatine Monohydrate, Medium Chain Triglycerides Powder, 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 selenite, Ergocalciferol, L-Choline Bitartrate, Sweetener, Inositol. Flagged by the analysis: Sweetener.

Is Serious Mass Vanilla Flavour safe to eat?

Serious Mass Vanilla Flavour scores 6.0/10 on Decode Label (Moderate). This adult sports nutrition supplement is primarily composed of maltodextrin and a protein blend, providing energy and muscle support. It is fortified with numerous vitamins, minerals, creatine, and L-glutamine.

Why does Serious Mass Vanilla Flavour score 6.0/10?

Flagged in the score: Contains the artificial sweetener acesulfame potassium (INS 950). Also noted: High carbohydrate content primarily from maltodextrin (77% of product). Presence of artificial flavors.

Who should avoid Serious Mass Vanilla Flavour?

The points the analysis notes are most relevant to: Avoiding artificial sweeteners (acesulfame potassium); Avoiding artificial flavors; Sensitive to specific protein sources (whey, casein).

Does Serious Mass Vanilla 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 Vanilla 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 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 6 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 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.

Reader reviews

How the product performed for people who used it — taste, value, everyday experience. Separate from the Decode Label score above, which rates what is on the label.

Sign in to leave a review.

Sign in →

No reviews yet — be the first to share your experience.

Help us keep this accurate

Two quick questions about our analysis — not about the product.

Was this analysis helpful?

Tells us whether the breakdown above actually answered your question.

Yes No

0 of 0 readers found this analysis helpful

Does your pack match this page?

Recipes change and packs get reformulated. If the ingredients or the panel on the pack in your hand differ from what we show, tell us and we will check it.

It matches Something is different

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.

Report Error

If you believe this score is inaccurate, provide details below. Our team reviews every report and will update the rating if warranted.

Report submitted

Our team will review your report and update the rating if the evidence warrants it. Thank you for helping keep our data accurate.

Share this product

Serious Mass Vanilla Flavour

Link copied — paste it in your Instagram bio or Story!