Ferrous Acid
Ferrous Acid appears in 1 indexed US food products. No FDA SAFFA status or CSPI rating is attached in this snapshot, so this page reports prevalence rather than a safety verdict.
What the data can answer
Ferrous Acid appears in 1 catalogued products, but this snapshot has no FDA SAFFA status or CSPI Chemical Cuisine rating attached to it. This page therefore cannot answer whether the ingredient is safe from those sources. It can show how often it occurs, where it tends to sit on labels, and which kinds of products contain it.
- 1
- catalogued products
- #71,300
- usage rank of 247,206
- 1
- named brands represented
- 5%
- average depth down ingredient lists
Catalog prevalence comes from Open Food Facts ingredient lists. FDA SAFFA and CSPI Chemical Cuisine labels are shown only when the source record contains them.
How to use this page
Audit the co-occurring flags first
100% of the linked products contain at least one separately flagged ingredient, making co-occurrence the dominant follow-up question. That figure does not identify Ferrous Acid as the trigger. Open records such as Flamin' Hot Crunchy and inspect which ingredient row carries the caution marker. The 0.0/100 product average is therefore a triage signal for this surrounding formulation set, not an ingredient verdict. Its 5% average label depth helps locate the term when checking the package.
100% of linked products contain a separately flagged ingredient
Processing is unusually concentrated here: Group 4 accounts for 1 of 1 NOVA-tagged records. That describes the surrounding products, not the substance. For a useful comparison, hold category and processing level constant, then inspect which named component changes alongside the caution flag; otherwise the product mix will confound the ingredient question.
Next check: open the lowest-scoring linked formulation and locate the exact caution-marked component.
Ferrous Acid: above-median product count (beats 71.2% of ranked ingredients)
- Usage rank
- #71,300
- of 247,206 ingredients that appear in at least one catalogued product, tied with 175,906 others that also appear in exactly 1 product.
- Typical depth in an ingredient list
- 5%
- Of the way down the captured list, averaged across the 1 product listing it (mean slot 3.0). Ferrous Acid usually falls near the top of the captured list; this position does not measure its amount because source formatting, compound ingredients and labeling exceptions vary.
Ranks use Open Food Facts ingredient rows on this site’s refresh cycle. 247,206 ingredients with ≥1 product appearance enter the ranking. Prevalence and list depth are catalog facts, not toxicology.
Products Containing Ferrous Acid
Every indexed product currently listing Ferrous Acid (1 total):
Count and score peers around flagged Ferrous Acid
Flag-heavy neighborhood — keep count peers and score peers on separate axes for Ferrous Acid (1 products).
Similar mean product score
Score-axis peers only, mean screening score among ingredients with ≥50 scored products, not a second count list.
Next steps from the Ferrous Acid page
Start from Ferrous Acid's 1 catalogued appearances and the attached source fields, then open the product rows that match your use case.
- Open the product sample for Ferrous Acid and read how the term sits on real packages. Browse linked labels
- Move to a second ingredient page and compare registry fields plus catalog mass side by side. Browse ingredient records
- Read how PlainFoodSafe joins source records before treating a screening label as a personal food or health conclusion. See source joins
This page describes published source classifications and product-label coverage. It is not dietary, allergy, or medical advice.
Frequently Asked Questions
How should I read safety signals when Ferrous Acid sits in heavily flagged products? ▼
100% of linked products contain at least one separately flagged ingredient, so the first task is locating which row carries the caution marker — not assuming Ferrous Acid is the trigger. None of that replaces a product-, dose-, allergy-, or person-specific determination.
Where does Ferrous Acid show up across the catalog? ▼
Ferrous Acid sits above the median for catalog prevalence (1 products, #71,300 of 247,206) across 1 named brands. Category mix varies — use the linked records rather than treating any single shelf as representative.
Why is Ferrous Acid so common on ingredient lists? ▼
The current source record does not specify a technical effect for Ferrous Acid. Its near the top of the captured list and product examples are shown without guessing why manufacturers include it.
Regulatory status: FDA SAFFA (Ferrous Acid). Safety ratings: CSPI Chemical Cuisine; product presence: Open Food Facts via PlainFoodSafe (September 2026). Figures are computed from those sources, no editor-typed counts. Methodology · State regulations.