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Brand owned by Nestlé (Switzerland) · about the brand
Nestlé Optifast Weight Management Shake
Decode Label Safety Score
How we got 6.0 ShowHide
Reviewed 5 times · Methodology v3.1 (updated 8 Oct 2026) — what changed
This meal replacement shake provides a comprehensive blend of protein, carbohydrates, fiber, vitamins, and minerals, making it suitable for adults seeking a structured dietary option under supervision. The inclusion of artificial sweeteners (Acesulfame Potassium and Steviol Glycosides) is a common feature in such products to manage calorie content, but some individuals may prefer to limit these. The product is well-fortified to serve as a meal replacement, and while it contains several processed ingredients typical of this category, it avoids harsh additives like hydrogenated fats or synthetic colors.
At a glance
From the declared label — not a lab testFindings to weigh
What’s favorable
- Whey Protein Concentrate
- Caseinates (milk protein)
- Milk Solids
- Low erucic rapeseed oil
- Isomaltulose
- +7 more →
Comprehensive adult meal replacement with artificial sweeteners and processed ingredients.
This adult meal replacement shake offers a balanced nutritional profile with protein, fiber, and essential micronutrients. It contains artificial sweeteners and processed ingredients typical for its category, which some consumers may wish to moderate. It is designed for adults under medical or dietary supervision.
Declared allergens: Milk and Soy
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
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.
Saturated fat 2.1 g · trans fat 0.1 g per 100 g/ml
1 concern could not be assessed from this label. That means we don't know — not that there's nothing to find.
Other audiences
AvoidThis 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 (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-quality protein sources (whey and casein)
Contains dietary fiber (guar gum, gum arabic)
Fortified with essential vitamins and minerals
Includes beneficial fats (low erucic rapeseed oil, high oleic sunflower oil)
Uses isomaltulose for sustained energy release
Watch out for
Contains artificial sweeteners (Acesulfame Potassium, Steviol Glycosides)
Contains maltodextrin and dried glucose syrup, which can impact blood sugar
Allergens: Milk and Soy
Nature identical (Vanilla) flavouring substances — a flavouring blend. Flavour substances are FSSAI/JECFA-evaluated, and labelling rules permit them to be declared by category ("natural", "nature identical", "artificial") rather than by individual compound — so the specific substances used are usually not disclosed. That means someone avoiding artificial flavourings, or with a known sensitivity, cannot verify what is in it. Noted as a moderate, transparency-level concern rather than a hazard.
Decode Label Analysis
Contains milk proteins (Whey Protein Concentrate, Caseinates, Milk Solids) and Soya lecithin, which are common allergens. Individuals with milk or soy allergies should avoid this product.
Contains artificial sweeteners (Acesulfame Potassium and Steviol Glycosides). While approved for use, some individuals may prefer to limit their intake of such additives.
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.
Weight management is a regulatory designation that can't be checked from the ingredient list.
The label does not provide a comparison point to verify the '60% less calories' claim.
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
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
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
Weight control and management are regulatory designations that can't be checked from the ingredient list.
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
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
The ingredients list nature identical (Vanilla) flavouring substances.
Protein provides 38% of this product’s energy, meeting the 20% a “high protein” claim requires. (Protein claims are set on % of energy, not % by weight.)
The nutrition information states 6g of fibre 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.
-
1.
Whey protein concentrate
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2.
Caseinates (milk protein)
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3.
Milk solids
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4.
Maltodextrin
-
5.
Low erucic rapeseed oil
-
6.
Dried glucose syrup
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7.
Isomaltulose
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8.
Partially hydrolyzed guar gum (Guar gum derivative)
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9.
Fibre (Gum arabic)
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10.
Minerals
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11.
High oleic sunflower oil
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12.
Nature identical (Vanilla) flavouring substances
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13.
Iodized salt
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14.
Emulsifier (Soya lecithin)
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15.
Vitamins
-
16.
Sweeteners (950 & 960)Acesulfame potassium (INS 950), Steviol glycosides (INS 960)
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.
✓ 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 | 400 kcal |
| Protein | 38 g |
| Carbohydrate | 41.3 g |
| Total Sugars | 14 g |
| Added Sugars | 8.7 g |
| Total Fat | 10.7 g |
| Saturated Fat | 2.1 g |
| Trans Fat | 0.06 g |
| Dietary Fibre | 6 g |
| Sodium | 250 mg |
Colour shows the per-100g level (green = low, amber = moderate, red = high), from the product's label.
Compare with other meal replacement 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.
Side-by-side comparisons
How this product's label compares with others on the same shelf, row by row.
What are the ingredients in Nestlé Optifast Weight Management Shake?
The label of Nestlé Optifast Weight Management Shake lists 16 ingredients, in label order: Whey Protein Concentrate, Caseinates (milk protein), Milk Solids, Maltodextrin, Low erucic rapeseed oil, Dried Glucose Syrup, Isomaltulose, Partially hydrolyzed guar gum (Guar gum derivative), Fibre (Gum arabic), Minerals, High oleic sunflower oil, Nature identical (Vanilla) flavouring substances, Iodized Salt, Emulsifier (Soya lecithin), Vitamins, Sweeteners (950 & 960). Flagged by the analysis: Nature identical (Vanilla) flavouring substances, Sweeteners (950 & 960).
Is Nestlé Optifast Weight Management Shake safe to eat?
Nestlé Optifast Weight Management Shake scores 6.0/10 on Decode Label (Moderate). This adult meal replacement shake offers a balanced nutritional profile with protein, fiber, and essential micronutrients. It contains artificial sweeteners and processed ingredients typical for its category, which some consumers may wish to moderate. It is designed for adults under medical or dietary supervision.
Why does Nestlé Optifast Weight Management Shake score 6.0/10?
What the analysis notes: Contains artificial sweeteners (Acesulfame Potassium, Steviol Glycosides). Contains maltodextrin and dried glucose syrup, which can impact blood sugar. Allergens: Milk and Soy.
Who should avoid Nestlé Optifast Weight Management Shake?
The points the analysis notes are most relevant to: Sensitive to artificial sweeteners; Milk protein allergy; Soy allergy.
Does Nestlé Optifast Weight Management Shake contain allergens?
Yes — the ingredient list contains milk (Whey Protein Concentrate, Caseinates (milk protein) and Milk Solids) and soy (Emulsifier (Soya lecithin)). Check the allergen statement on the pack too if you have a diagnosed allergy.
Does Nestlé Optifast Weight Management Shake contain milk?
Yes — the ingredient list names Whey Protein Concentrate, Caseinates (milk protein) and Milk Solids. People with milk allergy / lactose intolerance should treat it as containing milk, and check the allergen statement on the pack too.
Does Nestlé Optifast Weight Management Shake contain soy?
Yes — the ingredient list names Emulsifier (Soya 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 Nestlé Optifast Weight Management Shake?
14 g of total sugar per 100 g. The label declares 8.7 g of that as added sugar per 100 g.
Are the claims on the Nestlé Optifast Weight Management Shake pack accurate?
Decode Label checked 11 claims against the ingredient list and nutrition panel. "Supports Weight Management" — can't be verified from the label. "60% Less Calories" — can't be verified from the label. "Recommended as Meal Replacement" — can't be verified from the label.
Is Nestlé Optifast Weight Management Shake vegetarian?
Nestlé Optifast Weight Management Shake 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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