Leucine
Leucine appears in 63 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
Leucine appears in 63 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.
- 63
- catalogued products
- #4,249
- usage rank of 247,206
- 33
- named brands represented
- 49%
- 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.
Leucine sits in the busiest tenth of the catalog (#4,249 / 247,206)
- Usage rank
- #4,249
- of 247,206 ingredients that appear in at least one catalogued product, tied with 52 others that also appear in exactly 63 products.
- Typical depth in an ingredient list
- 49%
- Of the way down the captured list, averaged across the 63 products listing it (mean slot 9.6). Leucine usually falls in the upper half of the 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.
What this page can and cannot answer
Use prevalence before concern
Only 12.7% of linked products carry any separately flagged ingredient. The stronger differentiator here is market placement: Leucine spans 33 named brands and is led by the Dietary supplements group. Start with 5-mthf 5 Mg Methylfolate; Advanced Digestive Enzymes; Aller-c when comparing real formulations. Because the flagged component may be something else, neither the low co-occurrence rate nor the 98.2/100 product average proves this ingredient safe.
33 named brands carry this ingredient
The processing evidence is heterogeneous rather than a single shelf pattern: the largest NOVA group contains 63 of 63 classified products, leaving a meaningful remainder elsewhere. This breadth is why the page reports label depth, category, and product examples separately. Those dimensions help locate comparable products; combining them into a stronger safety claim would hide the variation the catalog actually contains.
Next check: compare label position across two brands before treating prevalence as equivalent exposure.
What else is usually in the same product as Leucine
Across the 63 products on this site that list Leucine, these flagged additives appear alongside it most often. The comparison column is how often each one appears across every product with a parsed ingredient list, so the two figures are measured over the same set. Sucralose shows up about 3.5x more often with Leucine than in the catalogue at large.
| Additive | Shared products | Share of Leucine products | Share of all products |
|---|---|---|---|
| Sucralose | 6 | 9.5% | 2.7% |
Co-occurrence describes what manufacturers formulate together. It is not a claim that these additives interact, and it carries no regulatory meaning. Counted over products with parsed ingredient lists; Open Food Facts, 2026-09-01.
How do the sampled products compare?
Each point is one of the 16 sampled products listed below: its overall safety score against how many separately flagged ingredients its label carries. Bubble size is the number of ingredient rows the label actually resolved to.
Safety score vs. flagged-ingredient count for products containing Leucine
Products Containing Leucine
High-volume slice (16 of 63) for products naming Leucine:
Peer ingredients with comparable catalog mass (near “2% Or Less Of Vegetable Oil”)
Leucine sits among other busy catalog rows (63 products, mean score 98.2/100). Nearest count peers include “2% Or Less Of Vegetable Oil”, “Acai Powder”, “Organic Acerola Extract”. Count peers and score peers are listed separately on purpose.
Similar product count
Nearest other ingredients by Open Food Facts product count (floored at ≥50).
Similar mean product score
Mean product-score neighbours (≥50 scored products), kept separate from the product-count peers above.
Using the Leucine evidence
63 product rows plus any FDA/CSPI fields on Leucine are the evidence base — drill into the listings that matter for your decision.
- Check the listed products containing Leucine before treating the aggregate count as a personal conclusion. See listed products
- Place Leucine next to “Acai Powder” (or another peer) using the same FDA/CSPI and prevalence fields. Browse ingredient records
- Read how PlainFoodSafe joins source records before treating a screening label as a personal food or health conclusion. Open methodology
This page describes published source classifications and product-label coverage. It is not dietary, allergy, or medical advice.
Questions readers ask about Leucine
Why is there no FDA/CSPI verdict on Leucine? ▼
This snapshot has no FDA SAFFA status or CSPI Chemical Cuisine rating attached to Leucine, so PlainFoodSafe does not present a source-backed safety verdict. The page reports catalog prevalence (#4,249 of 247,206 ingredients) and label position instead.
Which product shelves show up most often with Leucine? ▼
Leucine ranks in the top decile by product count (#4,249 of 247,206), appearing in 63 indexed products led by Dietary supplements. The sample list below is a slice of that footprint, not the full universe.
Why is Leucine so common on ingredient lists? ▼
The source record does not name a technical effect, yet Leucine appears in 63 products (#4,249 usage rank). High prevalence here describes formulation frequency, not an approved use level.
Regulatory status: FDA SAFFA (Leucine). 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.