I-theanine
I-theanine appears in 4 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
I-theanine appears in 4 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.
- 4
- catalogued products
- #28,812
- usage rank of 247,206
- 4
- named brands represented
- 52%
- 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.
What this page can and cannot answer
Audit the co-occurring flags first
50% of the linked products contain at least one separately flagged ingredient, making co-occurrence the dominant follow-up question. That figure does not identify I-theanine as the trigger. Open records such as Energy Drink; Lemon Elderflower Social Tonic; organic blackberry lemon kombucha tonic and inspect which ingredient row carries the caution marker. The 88.8/100 product average is therefore a triage signal for this surrounding formulation set, not an ingredient verdict. Its 52% average label depth helps locate the term when checking the package.
50% of linked products contain a separately flagged ingredient
Processing is unusually concentrated here: Group 4 accounts for 4 of 4 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.
Upper-half catalog placement for I-theanine (#28,812)
- Usage rank
- #28,812
- of 247,206 ingredients that appear in at least one catalogued product, tied with 6,278 others that also appear in exactly 4 products.
- Typical depth in an ingredient list
- 52%
- Mean relative depth 52% across 4 parsed labels, slot 10.5 on average. I-theanine tends to sit in the lower half of the list. Depth is location on the label, not a measured dose.
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.
How do the sampled products compare?
Each point is one of the 4 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 I-theanine
Products Containing I-theanine
Every indexed product currently listing I-theanine (4 total):
Similar catalog profiles where co-flags already cluster
Co-flag rate 50% makes peer triage useful: I-theanine covers 4 products (mean 88.8/100).
Similar mean product score
Score-axis peers only, mean screening score among ingredients with ≥50 scored products, not a second count list.
What to do with this I-theanine record
Start from I-theanine's 4 catalogued appearances and the attached source fields, then open the product rows that match your use case.
- Open the product sample for I-theanine and read how the term sits on real packages. See listed products
- Browse another ingredient record and keep the same FDA/CSPI and prevalence fields in view. Browse ingredient records
- 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.
Frequently Asked Questions
How should I read safety signals when I-theanine sits in heavily flagged products? ▼
50% of linked products contain at least one separately flagged ingredient, so the first task is locating which row carries the caution marker — not assuming I-theanine is the trigger. None of that replaces a product-, dose-, allergy-, or person-specific determination.
Where does I-theanine show up across the catalog? ▼
I-theanine sits above the median for catalog prevalence (4 products, #28,812 of 247,206) across 4 named brands. Category mix varies — use the linked records rather than treating any single shelf as representative.
Why is I-theanine so common on ingredient lists? ▼
The current source record does not specify a technical effect for I-theanine. Its in the lower half of the list and product examples are shown without guessing why manufacturers include it.
Regulatory status: FDA SAFFA (I-theanine). 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.