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Brand owned by Glanbia (Ireland) · about the brand
Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder
Decode Label Safety Score
How we got 5.5 ShowHide
Reviewed 8 times · Methodology v3.1 (updated 8 Oct 2026) — what changed
This protein supplement provides a high concentration of protein from a blend of whey isolates and concentrates, making it effective for muscle support. However, the use of artificial flavors and an undisclosed emulsifier (beyond the specified lecithin) raises transparency concerns. While generally suitable for healthy adults, individuals with sensitivities to artificial additives or those seeking fully natural formulations may wish to consider alternatives.
At a glance
From the declared label — not a lab testFindings to weigh
What’s favorable
- Whey Protein Isolate
- Whey Protein Concentrate
- Hydrolyzed Whey Protein Isolate
- INS 322(i)
- Cocoa powder
High protein content with artificial flavors and undisclosed emulsifier
This protein supplement delivers a substantial amount of protein from whey sources, beneficial for muscle recovery and growth. However, it includes artificial flavors and an emulsifier that isn't fully specified, which may be a concern for those avoiding synthetic additives or seeking full ingredient transparency.
Declared allergens: Milk
Relevant if you have this allergy or intolerance.
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
Score out of 10 · higher = fewer concernsHow 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.
Other audiences
AvoidThis 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
Emulsifier 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 a blend of whey sources
Includes hydrolyzed whey for potentially faster absorption
Contains cocoa powder for natural flavor and antioxidants
Watch out for
Undisclosed 'Emulsifier' beyond lecithin
Presence of 'Artificial Flavours'
Decode Label Analysis
The product lists 'Emulsifier' without specific identification, which is a transparency concern. While INS 322(i) (Lecithin) is disclosed, the presence of an additional, unnamed emulsifier means its safety profile cannot be fully assessed.
The product lists 'Sweetener' without specific identification. This lack of transparency prevents a full assessment of potential health impacts, as different sweeteners have varying safety profiles and potential side effects for sensitive individuals.
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.
The label does not provide information about the BCAA content, so the stated amount cannot be confirmed.
The label does not provide sufficient information to verify the claim of muscle support and recovery.
The label does not provide information or certification regarding banned substance testing, so this claim cannot be verified.
The nutrition information states that there are 24g of protein per serving.
The ingredients list cocoa powder and artificial flavours, which are consistent with a chocolate flavour.
The ingredient list shows Whey Protein Isolate as the first ingredient in the protein blend, indicating it is a primary source.
The label explicitly states that the product contains 29 servings.
The product name includes 'Gold Standard 100% Whey', and the ingredients list a protein blend including Whey Protein Isolate, Whey Protein Concentrate, and Hydrolyzed Whey Protein Isolate, which are all forms of whey.
Read straight from the back-of-pack photo — quantities, sections and any disguised terms, so the small print can’t hide behind the marketing.
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1.
Protein Blend 93%Protein Blend (93%)
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Whey Protein Isolate within Protein Blend
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Whey Protein Concentrate within Protein Blend
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Hydrolyzed Whey Protein Isolate within Protein Blend
-
2.
Emulsifier
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INS 322(i) within Emulsifier
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3.
Cocoa PowderCocoa Powder (Processed with Alkali)
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4.
Artificial FlavoursArtificial Flavours (Chocolate, Vanilla)
-
5.
SweetenerAcesulfame 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.
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.
✓ Decode Label Assessment: Favorable ⚠ Decode Label Assessment: Concern Decode Label Assessment: Neutral
Who should take caution
About this ingredient
No detailed safety data in our database yet for this ingredient.
Learn More
| Energy | 116 kcal |
| Protein | 24 g |
| Carbohydrate | 3 g |
| Total Sugars | 0.9 g |
| Added Sugars | 0 g |
| Total Fat | 0.9 g |
| Saturated Fat | 0.61 g |
| Trans Fat | 0 g |
| Sodium | 50 mg |
| Cholesterol | 45 mg |
Colour shows the per-100g level (green = low, amber = moderate, red = high), calculated from the declared serving — this label prints per-serving figures only.
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.
Gold Standard 100% Whey Unflavoured
7.5OPTIMUM NUTRITION.
Nutrabay Pure Pea Protein Isolate - 25.3g Protein, 5g BCAA
7.5Nutrabay
OZiva Protein & Herbs for Women (Chocolate)
7.5OZiva
Protinex Lite Zero Added Suger Vanilla Flaour
6.5Protinex
Optimum Nutrition (ON) Gold Standard 100%
6.0Optimum Nutrition
Side-by-side comparisons
How this product's label compares with others on the same shelf, row by row.
- VS Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder vs Optimum Nutrition (ON) Gold Standard 100%
- VS Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder vs Optimum Nutrition (ON) Serious Mass
- VS Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder vs OZiva Protein & Herbs for Women (Chocolate)
Also on this shelf
More Protein Supplement products we've analysed, in name order.
-
Optimum Nutrition Gold Standard 100% Whey Double Rich Chocolate Flavour
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-
MuscleBlaze MuscleBlaze Beginner's Whey Protein Powder, Chocolate
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-
Optimum Nutrition Optimum Nutrition (ON) Serious Mass
See the analysis
-
OZiva OZiva Plant Protein + Pro-Digest
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-
PentaSure PentaSure HP Whey Protein Powder
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-
RESOURCE RESOURCE Nestle Health Science, High Protein
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What are the ingredients in Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder?
The label of Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder lists 9 ingredients, in label order: Protein blend, Whey Protein Isolate, Whey Protein Concentrate, Hydrolyzed Whey Protein Isolate, Emulsifier, INS 322(i), Cocoa powder, Artificial Flavours, Sweetener. Flagged by the analysis: Sweetener.
Is Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder safe to eat?
Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder scores 5.5/10 on Decode Label (Moderate). This protein supplement delivers a substantial amount of protein from whey sources, beneficial for muscle recovery and growth. However, it includes artificial flavors and an emulsifier that isn't fully specified, which may be a concern for those avoiding synthetic additives or seeking full ingredient transparency.
Why does Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder score 5.5/10?
What the analysis notes: Undisclosed 'Emulsifier' beyond lecithin. Presence of 'Artificial Flavours'.
Who should avoid Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder?
The points the analysis notes are most relevant to: Sensitive to artificial flavors; Seeking fully disclosed ingredients; Milk allergy / lactose intolerance.
Does Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder contain allergens?
Yes — the ingredient list contains milk (Whey Protein Isolate, Whey Protein Concentrate and Hydrolyzed Whey Protein Isolate). Check the allergen statement on the pack too if you have a diagnosed allergy.
Does Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder contain milk?
Yes — the ingredient list names Whey Protein Isolate, Whey Protein Concentrate and Hydrolyzed Whey Protein Isolate. People with milk allergy / lactose intolerance should treat it as containing milk, and check the allergen statement on the pack too.
How much sugar is in Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder?
3 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 Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder pack accurate?
Decode Label checked 8 claims against the ingredient list and nutrition panel. "5.5g BCAAs" — can't be verified from the label. "FOR MUSCLE SUPPORT & RECOVERY" — can't be verified from the label. "BANNED SUBSTANCE TESTED" — can't be verified from the label.
Is Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder vegetarian?
Optimum Nutrition (ON) RCB Limited Edition Gold Standard 100% Whey Protein Powder 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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