L-serine
L-serine carries a source-backed screening score of 3/5 and appears in 9 indexed US food products.
Source-backed answer
L-serine appears in 9 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.
- 9
- catalogued products
- #16,390
- usage rank of 247,206
- 6
- named brands represented
- 53%
- 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-serine: top-decile catalog footprint (#16,390 of 247,206)
- Usage rank
- #16,390
- of 247,206 ingredients that appear in at least one catalogued product, tied with 1,423 others that also appear in exactly 9 products.
- Typical depth in an ingredient list
- 53%
- Mean relative depth 53% across 9 parsed labels, slot 23.3 on average. L-serine tends to sit in the lower half of the list. Depth is location on the label, not a measured dose.
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.
How to use this page
Separate this ingredient from its product neighborhood
This is a mixed product neighborhood: 3 of 9 records have some flagged component, while the rest do not. Compare EleCare Infant Formula; Gummy choco; HYDROPRO Advanced Hydrolyzed-Isolate Whey Protein Formula to see how surrounding formulations change; do not assign their 85–100 score range to L-serine 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.
3 of 9 linked records have some flagged component
All 8 NOVA-classified records cluster most heavily in Group 4, while the first-category labels split across several shelves. That makes the 85–100 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.
Function
FLAVOR ENHANCER, FLAVORING AGENT OR ADJUVANT, NUTRIENT SUPPLEMENT
How do the sampled products compare?
Each point is one of the 9 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-serine
Products Containing L-serine
A sample of 9 high-volume listings among the 9 indexed products containing L-serine:
High-volume peers for L-serine
Top-decile company for L-serine: 9 listings averaging 96.1/100.
Similar mean product score
Mean product-score neighbours (≥50 scored products), kept separate from the product-count peers above.
What to do with this L-serine record
Use the 9-product footprint and source labels as a starting point, then inspect the records most relevant to your question.
- Check the listed products containing L-serine before treating the aggregate count as a personal conclusion. Browse linked labels
- Browse another ingredient record and keep the same FDA/CSPI and prevalence fields in view. Browse ingredient records
- Check the methodology for how FDA SAFFA, CSPI, and Open Food Facts rows are joined on this site. Read the methodology
This page describes published source classifications and product-label coverage. It is not dietary, allergy, or medical advice.
Frequently Asked Questions
Does L-serine 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-serine 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-serine? ▼
L-serine ranks in the top decile by product count (#16,390 of 247,206), appearing in 9 indexed products led by Dietary supplements. The sample list below is a slice of that footprint, not the full universe.
What does L-serine do in food? ▼
L-serine is recorded as a flavor enhancer, flavoring agent or adjuvant, nutrient supplement in source technical-effect fields.
Regulatory status: FDA SAFFA (L-serine). 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.