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.
Betaine
Selected research topic
Glucose and metabolic health
Some measured outcomes improved in human comparison studies. Read these findings with their populations and conditions.
Some findings concern patients or people with a deficiency.
- Publications for this topic
- 5
- Human comparison publications
- 1
- Publications needing review
- 1
Findings in the studies
Body fat percentage
- A better result than the comparison group was reported.
What the comparison group used was not confirmed.
Single ingredientMeasurement and study conditions
- Study type
- Randomized controlled trial: subjects were randomly assigned to groups for comparison.
- Study population
- Human participants · Participant characteristics were not confirmed.
- Ingredients tested
- Single ingredient
- How results were compared
- Results were compared between groups.
- Measurement time
- Not confirmed.
risk of T2D
Other human research, including observational studies and reviews
- An association was observed. This does not establish that the ingredient caused the change.General population · median follow-up 6.63 years
Measurement and study conditions
- Study type
- Observational study
- Study population
- Human participants · General population
- Ingredients tested
- Unknown intervention
- How results were compared
- Comparison unclear · Study comparison: dietary betaine intake categories and incident T2D; observational association
- Additional measurement information
- Primary outcome
- Measurement time
- median follow-up 6.63 years
risk of type 2 diabetes
Other human research, including observational studies and reviews
- An association was observed. This does not establish that the ingredient caused the change.General population · median 9 years
Measurement and study conditions
- Study type
- Observational study
- Study population
- Human participants · General population
- Ingredients tested
- Unknown intervention
- How results were compared
- Comparison unclear · Study comparison: prospective observational dietary betaine intake associations with incident type 2 diabetes; supplem
- Measurement time
- median 9 years
serum glucose concentrations
Other human research, including observational studies and reviews
- An association was observed. This does not establish that the ingredient caused the change.Patient group · Single ingredient · 1 year
Measurement and study conditions
- Study type
- Observational study
- Study population
- Human participants · Patient group
- Ingredients tested
- Single ingredient
- How results were compared
- Comparison unclear · Study comparison: observational association with one-year dietary betaine intake increase; no randomized betaine assig
- Additional measurement information
- Biomarker
- Measurement time
- 1 year
This result is held for interpretation. That does not mean research found no effect.
Outcome groups needing additional review (1)
- blood glucose concentrations · Distinct papers needing additional review: 1Evidence criteria check: 1
One paper can appear under multiple measured outcomes or review reasons, so these counts should not be added together.
Representative outcome and study details
Human studies reported between-group improvement in Body fat percentage.
Single-ingredient studies · Human studies · Population not specified · 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: B
The 62.7 evidence score includes 3 independent human studies and 3 clinical studies in the representative benefit area. The B tier remains conservative because of the evidence centers on contextual or measured outcomes rather than general-use effects, limited repetition across independent human clinical studies.
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: 60
Papers linked to this topic 5 · distinct papers 5 · papers with a confirmed human comparison 1 · papers needing additional review 1
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.
- blood glucose concentrations: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- Body fat percentage: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 1
- risk of T2D: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- risk of type 2 diabetes: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
- serum glucose concentrations: Sources represented in this measurement group: 1 · Distinct papers with human comparisons for this outcome: 0
What the research found
Body fat percentage
The study reported improvement in this measurement.
Controlled study in people · Single ingredient · Unspecified population
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.
risk of T2D
An association was observed. This does not establish that the ingredient caused the change.
Observational study · Unknown intervention · 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.
risk of type 2 diabetes
An association was observed. This does not establish that the ingredient caused the change.
Observational study · Unknown intervention · 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.
serum glucose concentrations
An association was observed. This does not establish that the ingredient caused the change.
Observational study · Single ingredient · Patient group
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.
blood glucose concentrations
The study needs further checking before its result can be interpreted.
Animal study · indirect · Single ingredient · General population
This finding comes from animal or cell research. It does not establish the same effect in people.
The comparison could not be confirmed.
Analysis coverage and paper counts
1 paper · 1 measured outcome
1 papers held from direction counts
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 reviewed caution rules are available yet. Reported caution findings are shown below.
Findings to review with care
Side effects reported for the ingredient alone are separated from findings involving another supplement or medication.
Side effects reported with this ingredient alone
Symptoms or adverse events reported in studies without another active ingredient.
ALT1 papers
Betaine at doses of 2–8 g/day for 12–24 weeks significantly reduced ALT and other liver injury markers in 70 participants with MASLD, with mild transient GI symptoms reported in ~35 %.Human studies · Randomized controlled trial