L-hydroxyproline
L-hydroxyproline carries a source-backed screening score of 3/5 and appears in 1 indexed US food products.
Source-backed answer
L-hydroxyproline appears in 1 catalogued products. CSPI has no rating attached in this snapshot. Its FDA SAFFA status is “Listed.” Those source labels describe the ingredient; they do not establish whether a particular product, dose, allergy, or diet is safe.
- 1
- catalogued products
- #71,300
- usage rank of 247,206
- 1
- named brands represented
- 99%
- 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.
L-hydroxyproline ranks above 71.2% of catalogued 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
- 99%
- Of the way down the captured list, averaged across the 1 product listing it (mean slot 104.0). L-hydroxyproline usually falls near the end of the captured list; this position does not measure its amount because source formatting, compound ingredients and labeling exceptions vary.
Derived by this site from the ingredient lists of every catalogued product (Open Food Facts), recomputed on each data refresh. 247,206 ingredients have at least one appearance and are ranked here. Usage and list position describe prevalence, not safety.
Reading this ingredient record
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 L-hydroxyproline as the trigger. Open records such as Gummy choco and inspect which ingredient row carries the caution marker. The 95.0/100 product average is therefore a triage signal for this surrounding formulation set, not an ingredient verdict. Its 99% 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.
Products Containing L-hydroxyproline
Every indexed product currently listing L-hydroxyproline (1 total):
Count and score peers around flagged L-hydroxyproline
With 100% co-flag overlap, compare peers on count and mean score separately — L-hydroxyproline spans 1 products at 95/100 average screening score.
Similar mean product score
Score-axis peers only, mean screening score among ingredients with ≥50 scored products, not a second count list.
Using the L-hydroxyproline evidence
Start from L-hydroxyproline's 1 catalogued appearances and the attached source fields, then open the product rows that match your use case.
- Check the listed products containing L-hydroxyproline before treating the aggregate count as a personal conclusion. See listed products
- Browse another ingredient record and keep the same FDA/CSPI and prevalence fields in view. Compare a peer
- See the join rules behind screening scores before reading them as dietary advice. See source joins
This page describes published source classifications and product-label coverage. It is not dietary, allergy, or medical advice.
L-hydroxyproline — common follow-ups
How should I read safety signals when L-hydroxyproline 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 L-hydroxyproline is the trigger. Where a source rating exists, L-hydroxyproline scores 3/5 on this site's screening scale with FDA SAFFA status "Listed". None of that replaces a product-, dose-, allergy-, or person-specific determination.
Where does L-hydroxyproline show up across the catalog? ▼
L-hydroxyproline 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 L-hydroxyproline so common on ingredient lists? ▼
The current source record does not specify a technical effect for L-hydroxyproline. Its near the end of the captured list and product examples are shown without guessing why manufacturers include it.
Regulatory status: FDA SAFFA (L-hydroxyproline). 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.