Improvement after a supplement is not the same as a comparative result
Start with the comparison. A before-and-after change alone cannot isolate the contribution of an ingredient.
Thiamine
Selected research topic
Migraine and pain
Confirmed comparison evidence for this topic is limited. The findings below retain their study conditions.
Some findings concern patients or people with a deficiency.
- Publications for this topic
- 3
- Human comparison publications
- 0
- Publications needing review
- 0
Findings in the studies
severe headache or migraine
Other human research, including observational studies and reviews
- An association was observed. This does not establish that the ingredient caused the change.General population · Single ingredient · past 3 months
Measurement and study conditions
- Observational study
- Observational study
- Single ingredient
- General population
- Primary outcome
- Comparison unclear
- Timepoint: past 3 months
- Study comparison: Observational dietary intake/status association as reported; this source does not establish a contro
symptoms
Other human research, including observational studies and reviews
- A change was reported before and after use. Its cause cannot be isolated.Patient group · Single ingredient
Measurement and study conditions
- Other evidence
- Single ingredient
- Patient group
- Primary outcome
- Within-group comparison
- Timepoint: unspecified
- Study comparison: single-patient before/after observation; no comparator
frequency of headache attacks
Research with unclear study subject or type
- The study reported improvement in this measurement.Patient group · Single ingredient
Measurement and study conditions
- Other evidence
- Single ingredient
- Patient group
- Outcome role not specified
- Between-group comparison
- Study subject not identified
- Timepoint: unspecified
- Study comparison: unspecified
Representative outcome and study details
Studies with an unspecified organism reported between-group improvement in frequency of headache attacks.
Single-ingredient studies · Includes patient groups · between-group comparison
1 publications linked to this result
- Route, form, dose, or population details are incomplete, so the findings cannot be confirmed as directly comparable.
Data coverage and detailed study classifications
Paper counts are separated by research topic below. One paper may contribute to multiple findings.
Analysis status: Public-ready
Ingredient analysis date:
How the grade was determined: C
The 16.9 evidence score includes 0 independent human studies and 0 clinical studies in the representative benefit area. The C tier remains conservative because of limited repetition across independent human clinical studies, too few clinical findings with an explicit effect direction.
The grade is based mainly on the research area with the most evidence. It does not mean the same result was found in other areas.
Papers linked to this ingredient overall: 82
Papers linked to this topic 3 · distinct papers 3 · comparison findings need further review · papers needing additional review 0
A publication may appear in more than one count. These numbers should not be added. Ingredient-wide papers, topic-linked papers, and sources in outcome groups use different scopes. Adding source counts may count the same paper more than once.
- frequency of headache attacks: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- severe headache or migraine: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- symptoms: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
What the research found
frequency of headache attacks
The study reported improvement in this measurement.
Other evidence · Single ingredient · Patient group
Between-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
severe headache or migraine
An association was observed. This does not establish that the ingredient caused the change.
Observational study · Single ingredient · General population
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
symptoms
A change was reported before and after use. Its cause cannot be isolated.
Other evidence · Single ingredient · Patient group
Within-group comparison
Analysis coverage and paper counts
1 paper · 1 measured outcome
Direction counts are distinct papers within each row. Outcome contributions count endpoint results, so one paper may contribute more than once.
How to read research findings
How should I read research findings?
Research guidesNo clear difference and an uninterpretable result are different
A reported null comparison contains a result. An abstract without an interpretable comparison leaves a question unresolved.
Paper counts and study counts are different
Count original research separately from research that reanalyzes it. Publication volume is neither replication nor a quality rating.
Side effects and combination findings
Findings from this ingredient alone are shown separately from those involving another supplement or medication.
No combination cautions are available to show in the current data. This does not guarantee safety.
Side effects and combination studies
No side-effect or combination findings are available to show from the collected papers. This does not establish safety.