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Brand owned by Nestlé (Switzerland) · about the brand
Optifast Weight Management Shake
Decode Label Safety Score
How we got 6.0 ShowHide
Reviewed 3 times · Methodology v3.1 (updated 8 Oct 2026) — what changed
This meal replacement shake provides a balanced macronutrient profile with added fiber, vitamins, and minerals, making it suitable for adults managing their weight or requiring dietary supplementation under supervision. The use of artificial sweeteners (INS 950 and INS 960) and nature-identical flavorings means it is an ultra-processed food, which some consumers prefer to limit. While generally safe for its intended adult audience, individuals sensitive to artificial sweeteners or specific food gums might experience mild digestive discomfort.
At a glance
From the declared label — not a lab testFindings to weigh
What’s favorable
- Whey Protein Concentrate
- Calcium Caseinate
- Skimmed Milk Powder
- Low erucic acid rapeseed oil
- Isomaltulose powder
- +6 more →
Adult meal replacement with balanced macros, fiber, and artificial sweeteners.
This adult meal replacement shake offers a comprehensive nutritional profile, including protein, carbohydrates, fats, fiber, and micronutrients. It contains artificial sweeteners and nature-identical flavorings, which are common in such products but may be a concern for those avoiding these additives. It is designed for adults under dietary supervision, not for children.
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.
Saturated fat 2 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 healthy fats (rapeseed oil, sunflower oil)
Uses isomaltulose for sustained energy release
Watch out for
Contains artificial sweeteners (Acesulfame Potassium)
Includes nature-identical flavorings
High in carbohydrates from maltodextrin and dried glucose syrup, which can cause rapid blood sugar spikes for some individuals
Contains milk, a common allergen
Decode Label Analysis
Contains milk proteins (Whey Protein Concentrate, Calcium Caseinate, Skimmed Milk Powder), which are common allergens. Individuals with milk allergies should avoid this product.
Contains artificial sweeteners (Acesulfame Potassium, INS 950) and nature-identical flavorings, contributing to the ultra-processed nature of the product. While approved for use, some consumers prefer to limit these 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.
The claim 'Supports Weight Management' is a functional claim that cannot be verified from the ingredient list or nutrition facts alone.
The label states '60% Less Calories' but does not provide a reference product or baseline for comparison, making the claim unverifiable.
The claim 'Low GI' (Glycemic Index) is a functional claim that cannot be verified from the ingredient list or nutrition facts alone.
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
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
The brand name 'Optifast' is present on the label.
The product is identified as 'Strawberry Shake' and contains nature identical flavouring substances (Strawberry).
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.)
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.
Calcium caseinate
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3.
Skimmed milk powder
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4.
Low erucic acid rapeseed oil
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5.
Maltodextrin
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6.
Dried glucose syrup
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7.
Isomaltulose powder
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8.
Partially hydrolysed guar gum
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9.
Fiber (Gum arabic)
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10.
Nature identical flavouring substances (Vanilla and Strawberry)
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11.
Sunflower oil
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12.
Vitamins and Minerals
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13.
Redbeet puree
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14.
Corn starch
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15.
Iodized Salt
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16.
Emulsifier (INS 322[i])Lecithin (INS 322)
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17.
Rice flour
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18.
Sweetener (INS 950 and INS 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 | 40.25 g |
| Total Sugars | 14 g |
| Added Sugars | 7.04 g |
| Total Fat | 11 g |
| Saturated Fat | 2 g |
| Trans Fat | 0.05 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 Optifast Weight Management Shake?
The label of Optifast Weight Management Shake lists 18 ingredients, in label order: Whey Protein Concentrate, Calcium Caseinate, Skimmed Milk Powder, Low erucic acid rapeseed oil, Maltodextrin, Dried Glucose Syrup, Isomaltulose powder, Partially hydrolysed guar gum, Fiber (Gum arabic), Nature identical flavouring substances (Vanilla and Strawberry), Sunflower oil, Vitamins and Minerals, Redbeet puree, Corn Starch, Iodized Salt, Emulsifier (INS 322[i]), Rice flour, Sweetener (INS 950 and INS 960). Flagged by the analysis: Nature identical flavouring substances (Vanilla and Strawberry), Sweetener (INS 950 and INS 960).
Is Optifast Weight Management Shake safe to eat?
Optifast Weight Management Shake scores 6.0/10 on Decode Label (Moderate). This adult meal replacement shake offers a comprehensive nutritional profile, including protein, carbohydrates, fats, fiber, and micronutrients. It contains artificial sweeteners and nature-identical flavorings, which are common in such products but may be a concern for those avoiding these additives. It is designed for adults under dietary supervision, not for children.
Why does Optifast Weight Management Shake score 6.0/10?
What the analysis notes: Contains artificial sweeteners (Acesulfame Potassium). Includes nature-identical flavorings. High in carbohydrates from maltodextrin and dried glucose syrup, which can cause rapid blood sugar spikes for some individuals.
Who should avoid Optifast Weight Management Shake?
The points the analysis notes are most relevant to: Sensitive to artificial sweeteners; Digestive sensitivities to gums; Milk allergy.
Does Optifast Weight Management Shake contain allergens?
Yes — the ingredient list contains milk (Whey Protein Concentrate, Calcium Caseinate and Skimmed Milk Powder). Check the allergen statement on the pack too if you have a diagnosed allergy.
Does Optifast Weight Management Shake contain milk?
Yes — the ingredient list names Whey Protein Concentrate, Calcium Caseinate and Skimmed Milk Powder. 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 Optifast Weight Management Shake?
14 g of total sugar per 100 g. The label declares 7 g of that as added sugar per 100 g.
Are the claims on the Optifast Weight Management Shake pack accurate?
Decode Label checked 12 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. "Low GI" — can't be verified from the label.
Is Optifast Weight Management Shake vegetarian?
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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