Component
Human headache frequency during aspartame challenges
Context-specific entity; species, compartment and exposure are stated on each claim.
2 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What acts on it
An acute crossover challenge in 40 self-reported headache-sensitive adults found headaches in 35% after 30 mg/kg aspartame versus 45% after placebo.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Acute human challenge.
- limitations
- Different exposure duration from the repeated trial; no molecular mechanism identified.
- nutrient_topic
- Aspartame collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · Aspartame
- plain_language
- Another blinded study did not reproduce increased headache frequency.
- primary_references
- Aspartame and susceptibility to headache. · 1987 · https://pubmed.ncbi.nlm.nih.gov/3657889/ · DOI 10.1056/NEJM198711053171903
Aspartame: digestion, taste, metabolite dependencies and experimental signaling (2026-09-20) · lines 314–320
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Acute human challenge. · source_derived_draft · unverified_draft
## aspartame-headache-null Another blinded study did not reproduce increased headache frequency. An acute crossover challenge in 40 self-reported headache-sensitive adults found headaches in 35% after 30 mg/kg aspartame versus 45% after placebo. Model: Acute human challenge. Limitations: Different exposure duration from the repeated trial; no molecular mechanism identified. Evidence access: Primary abstract Aspartame and susceptibility to headache. · 1987 · https://pubmed.ncbi.nlm.nih.gov/3657889/ · DOI 10.1056/NEJM198711053171903
Complete structured claim and evidenceA repeated crossover trial reported headaches on 33% of aspartame days versus 24% of placebo days, P=0.04; 18 of 32 randomized participants completed all periods.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- About 30 mg/kg/day, seven-day periods; self-identified headache-sensitive volunteers.
- limitations
- No significant difference in headache duration or intensity; attrition and multiple analyses limit certainty.
- nutrient_topic
- Aspartame collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · Aspartame
- plain_language
- A positive symptom finding comes with substantial missing follow-up.
- primary_references
- Aspartame ingestion and headaches: a randomized crossover trial. · 1994 · https://pubmed.ncbi.nlm.nih.gov/7936222/ · DOI 10.1212/wnl.44.10.1787
Aspartame: digestion, taste, metabolite dependencies and experimental signaling (2026-09-20) · lines 306–312
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · About 30 mg/kg/day, seven-day periods; self-identified headache-sensitive volunteers. · source_derived_draft · unverified_draft
## aspartame-headache-positive A positive symptom finding comes with substantial missing follow-up. A repeated crossover trial reported headaches on 33% of aspartame days versus 24% of placebo days, P=0.04; 18 of 32 randomized participants completed all periods. Model: About 30 mg/kg/day, seven-day periods; self-identified headache-sensitive volunteers. Limitations: No significant difference in headache duration or intensity; attrition and multiple analyses limit certainty. Evidence access: Primary abstract Aspartame ingestion and headaches: a randomized crossover trial. · 1994 · https://pubmed.ncbi.nlm.nih.gov/7936222/ · DOI 10.1212/wnl.44.10.1787
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.