Research review priorities
Supplement research priorities
These are research priorities, not recommendations. We selected decisions where public interest, plausible benefit, evidence maturity, and safety stakes make a careful synthesis especially useful.
- priority dossiers
- 148
- claim-level questions
- 444
- study extraction underway
- 148
01 / PRIORITY
How priorities were selected
Priority reflects relevance to healthy aging, frequency of real-world use, maturity of human evidence, the cost of a wrong decision, and the need to separate a valid narrow use from broader marketing claims. It does not rank efficacy or imply that everyone should take the product.
02 / EXTRACTION
What happens next
For every question, we screen the PubMed candidate set, connect multiple publications from the same trial, extract population, dose, comparator, duration, outcomes, harms, and funding, then synthesize supportive, mixed, negative, and safety findings together.
Only screened studies enter audited study and participant totals. Search-result counts and the papers listed here as questions never become evidence by themselves.Inulin
- Review stage
- Extracting studies
- audited research papers
- 2
Why this is a research priority
Inulin may improve bowel frequency and consistency, but bloating often persists and small, heterogeneous or carryover-prone trials limit dose and population claims.
Questions being reviewed
- How much does inulin improve stool frequency, consistency, transit, and constipation-related quality of life?
- Which microbiome changes correspond to meaningful symptoms rather than biomarkers alone?
- Which doses balance bowel benefit against gas, bloating, pain, and adherence?
Resistant starch
- Review stage
- Extracting studies
- audited research papers
- 3
Why this is a research priority
Resistant starch is a family of ingredients whose metabolic, microbiome, and bowel effects vary by type, dose, food matrix, population, and endpoint.
Questions being reviewed
- Which resistant-starch types improve glycemic control or insulin sensitivity in defined metabolic populations?
- Do stool weight and microbiome changes translate into more frequent or easier bowel movements?
- How do starch type, preparation, dose, duration, gas, and bloating alter the benefit-risk balance?
Methylcellulose
- Review stage
- Extracting studies
- audited research papers
- 2
Why this is a research priority
Methylcellulose is widely used as a bulk laxative, but its direct published evidence is old, uncontrolled, short, and much thinner than routine use implies.
Questions being reviewed
- How much does methylcellulose improve stool frequency, consistency, straining, and complete bowel movements?
- How does it compare directly with psyllium, osmotic laxatives, or placebo in modern trials?
- What water intake, swallowing, obstruction, and medicine-separation precautions apply?
Enteric-coated peppermint oil
- Review stage
- Extracting studies
- audited research papers
- 2
Why this is a research priority
Pooled IBS symptom relief is very low certainty and conflicts with rigorous endpoint-based trials, while release site and reflux-related adverse effects matter.
Questions being reviewed
- Does enteric-coated peppermint oil improve global IBS symptoms and clinically defined abdominal-pain response?
- How do small-intestinal, ileocolonic, and other release formulations differ?
- How often do reflux, heartburn, and other adverse effects offset possible benefit?
Lactase enzyme
- Review stage
- Extracting studies
- audited research papers
- 2
Why this is a research priority
Oral lactase reduces symptoms during controlled lactose challenges, but enzyme units, products, lactose dose, timing, and the distinction between malabsorption and intolerance determine real-world benefit.
Questions being reviewed
- How effectively does lactase reduce symptoms and breath hydrogen with a realistic lactose-containing meal?
- Which FCC-unit doses, enzyme sources, product forms, and timing are effective?
- Who has confirmed lactose intolerance rather than self-reported symptoms, and how should dairy nutrition be preserved?
03 / SOURCES
Research standards
The review begins with federal evidence summaries and PubMed records, then moves to trial-level extraction. Product claims or another publisher’s evidence grade are not copied into the ledger.