4-in-1 Fiber
4-in-1 Fiber by Metamucil has 1 tracked ingredient, with an overall safety score of 5 out of 5, 0.88 points above the 4.12/5 average across all scored products. Its Nutri-Score is D.
- Safety score 0.88 points above the 4.12/5 average across all scored products
- NOVA processing classification: group 4
Plant-based foods and beverages / Plant-based foods / Breakfasts / Cereals and potatoes / Cereals and their products / Breakfast cereals
How This Score Is Built
4-in-1 Fiber draws on FDA status, EU regulatory status, US state actions, and published research, combined into a single editorially-derived 1-5 scale (never an official government rating). 1 of its 1 tracked ingredient is scored so far; data as of 2026-09-07.
Open Food Facts, FDA, and EU regulatory records feed this score. The FDA site → has the primary record; our methodology page explains the scoring.
Where 4-in-1 Fiber sits nationally
Average ingredient safety score vs. 58,710 other scored products in PlainIngredients
5 Top 15% higher than 85% of 58,710 scored products
Average ingredient safety score (1 = highest risk, 5 = safest), bucketed by value
Each bar is a band; taller bars hold more scored products. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source PlainIngredients ingredient safety index · 2026-09-07
Ingredient Safety Breakdown
Processing Level
Ultra-processed products are formulations made mostly or entirely from substances derived from foods and additives. They typically contain ingredients not commonly used in home cooking.
Full Ingredients List
Sucrose, psyllium husk, citric acid, natural and artificial orange flavor, Yellow 6
Product Details
- Brand
- Metamucil
- Barcode
- 0037000741343
- Nutri-Score
- Grade D
- NOVA Group
- 4 — Ultra-processed foods
- Available In
- United States
- Stores
- CostCo
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Frequently asked questions
How does 4-in-1 Fiber's safety score compare to other products?
Among the 58,710 PlainIngredients products with a scored ingredient list, 4-in-1 Fiber's 5/5 average puts it in the safer 85%, 0.88 points above the 4.12/5 average across all scored products.
How should 4-in-1 Fiber's 5/5 score be read?
Each ingredient gets a 1-5 score (1 highest risk, 5 safest) built from FDA and EU regulatory status; 4-in-1 Fiber's 5/5 is the average across every mapped ingredient it lists, landing it in the Generally Safe tier.
Every figure on PlainIngredients is rendered directly from FDA, EU, EFSA and U.S. state regulatory records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.