L-tryptophan
L-tryptophan carries a source-backed screening score of 3/5 and appears in 98 indexed US food products.
Source-backed answer
L-tryptophan appears in 98 catalogued products. CSPI has no rating attached in this snapshot. Its FDA SAFFA status is “Approved.” Those source labels describe the ingredient; they do not establish whether a particular product, dose, allergy, or diet is safe.
- 98
- catalogued products
- #3,174
- usage rank of 247,206
- 44
- named brands represented
- 60%
- 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-tryptophan sits in the busiest tenth of the catalog (#3,174 / 247,206)
- Usage rank
- #3,174
- of 247,206 ingredients that appear in at least one catalogued product, tied with 23 others that also appear in exactly 98 products, listed in more products than 98.7% of them.
- Typical depth in an ingredient list
- 60%
- Of the way down the captured list, averaged across the 98 products listing it (mean slot 22.2). L-tryptophan usually falls in the lower half of the 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.
Reading this ingredient record
Separate this ingredient from its product neighborhood
This is a mixed product neighborhood: 32 of 98 records have some flagged component, while the rest do not. Compare Advanced Amino Formula; Advanced Amino Formula; Alimentum hypoallergenic for food allergies and to see how surrounding formulations change; do not assign their 70–100 score range to L-tryptophan itself. The ingredient most often sits in the lower half of the list, and Dietary supplements supplies the most useful like-for-like starting point for a label review.
32 of 98 linked records have some flagged component
All 97 NOVA-classified records cluster most heavily in Group 4, while the first-category labels split across several shelves. That makes the 70–100 score spread more informative than the average alone: investigate the low end, identify the actual flagged row, and compare it with a similar unflagged formulation before drawing a conclusion.
Next check: pair one flagged product with a similar unflagged product from the same shelf category.
What else is usually in the same product as L-tryptophan
Across the 98 products on this site that list L-tryptophan, 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 9.4x more often with L-tryptophan than in the catalogue at large.
| Additive | Shared products | Share of L-tryptophan products | Share of all products |
|---|---|---|---|
| Sucralose | 25 | 25.5% | 2.7% |
| Acesulfame Potassium | 11 | 11.2% | 1.8% |
| Monk fruit extract | 10 | 10.2% | 0.5% |
| Carrageenan | 6 | 6.1% | 4.5% |
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.
Function
NUTRIENT SUPPLEMENT
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 L-tryptophan
Products Containing L-tryptophan
16 busy labels from the 98 indexed products that list L-tryptophan:
L-tryptophan vs other top-decile catalog footprints
High-volume peers for L-tryptophan: 98 products, mean screening score 94/100. Catalog-mass neighbours in view: Active Yogurt Cultures With L. Bulgaricus; Anti-caking Agents; Asiago. Axes below stay distinct so count-neighbors do not duplicate score-neighbors.
Similar product count
Nearest other ingredients by Open Food Facts product count (floored at ≥50).
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-tryptophan evidence
Start from L-tryptophan's 98 catalogued appearances and the attached source fields, then open the product rows that match your use case.
- Review the sampled product records that list L-tryptophan to see how the ingredient appears in actual labels. Open product sample
- Move to a second ingredient page and compare registry fields plus catalog mass side by side. 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.
Questions readers ask about L-tryptophan
Does L-tryptophan carry its own safety label in this catalog? ▼
This is a mixed neighborhood: some linked products carry a separate flag while others do not. L-tryptophan itself carries and FDA SAFFA status "Approved" where the source record supplies them. Compare like-for-like products before treating the average screening score as an ingredient verdict.
Which product shelves show up most often with L-tryptophan? ▼
L-tryptophan ranks in the top decile by product count (#3,174 of 247,206), appearing in 98 indexed products led by Dietary supplements. The sample list below is a slice of that footprint, not the full universe.
What does L-tryptophan do in food? ▼
L-tryptophan is recorded as a nutrient supplement in source technical-effect fields.
Regulatory status: FDA SAFFA (L-tryptophan). 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.