Evidence Map

Supplement Evidence Density Map 2026

Healthy Aging Atlas analyzed 2,187 cleaned supplement-goal pairings from its internal evidence matrix to ask a simple question: how much of the marketed supplement landscape is backed by published human randomized controlled trials? The short answer: 22.2% of the cleaned pairings had zero published RCTs mapped in the matrix, while only 3.7% reached the high-density bucket of 10 or more RCTs. This is not a claim that those supplements never work. It is a map of where human trial evidence is dense, thin, or missing.

Written by Healthy Aging Atlas Research Team·Status note: Original-data methodology report; no personalized supplement or treatment recommendation is made.·Updated June 15, 2026

This content is for educational purposes only and is not medical advice. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

22.2%

zero mapped RCTs

485 of 2,187 cleaned pairings

37.9%

3+ mapped RCTs

828 pairings with a deeper evidence base

3.7%

10+ mapped RCTs

80 pairings in the highest-density bucket

52.1%

at least one meta-analysis

1,140 pairings with mapped review literature

Key findings

22.2% of cleaned supplement-goal pairings had zero mapped published RCTs (485 of 2,187).
37.9% had at least 3 mapped RCTs, the threshold HAA treats as a more meaningful evidence base.
Only 3.7% reached the 10+ RCT bucket.
52.1% had at least one mapped meta-analysis or systematic-review signal.
129 zero-RCT pairings still had at least 1,000 estimated monthly searches, suggesting demand can outrun trial density.
The map measures evidence density, not product quality, dose adequacy, individual suitability, or medical benefit.

RCT density distribution

The matrix is not evenly distributed. A large zero-RCT tail sits beside a smaller set of heavily studied pairings. The 80 pairings with 10 or more RCTs are the exception, not the norm.

Bar chart showing RCT count buckets across the cleaned evidence matrix — Source: Healthy Aging Atlas Supplement Evidence Density Map 2026.

Evidence density by claim cluster

Some categories have large bodies of human research; others are mostly market demand plus thin clinical support. Cluster-level views prevent one strong ingredient from making the whole supplement landscape look stronger than it is.

Demand and evidence do not always move together

High search demand is not the same as strong human evidence. This is why HAA separates demand, evidence, commercial availability, and YMYL risk before deciding which pages deserve full editorial treatment.

Source: Healthy Aging Atlas Supplement Evidence Density Map 2026.

Top 10 most-studied supplement-goal pairings

These pairings had the highest mapped RCT counts in the cleaned matrix. Counts are evidence-density signals, not automatic recommendations.

Supplement	Goal	Cluster	R C Ts	Meta-analyses	Monthly demand
Phytosterols	Cholesterol	Cardiovascular	87	8	210
MCT Oil	Triglyceride	Cardiovascular	73	12	580
Lavender	Anxiety	Stress & Mood	38	19	880
Policosanol	Cholesterol	Cardiovascular	35	2	90
Glutathione	Stress	Stress & Mood	34	2	10
Collagen Peptides	Skin	Beauty & Hair	30	3	9900
Cranberry	Infection	Immune Support	28	24	20
Iron	Anemia	General Wellness	28	0	8100
Fish Oil	Lipid	Cardiovascular	26	0	13200
Senna	Constipation	Gut Health	25	19	2400

High-demand pairings with zero mapped RCTs

These pairings had zero mapped published RCTs in the cleaned matrix and comparatively high search demand. This table is a prioritization signal for evidence literacy, not a claim that any product is ineffective.

Supplement	Goal	Cluster	Monthly demand	C P C
Vitamin D	Body Fat	General Wellness	32920	2.05
Vitamin D	Fatigue	Energy & Fatigue	32920	2.05
Vitamin D	Weight Loss	Metabolic Health	32920	2.05
Fish Oil	Memory	Cognitive Health	13200	1.89
Coenzyme Q10	Fertility	Fertility	8880	2.69
Coenzyme Q10	Blood Pressure	Cardiovascular	8880	2.69
Coenzyme Q10	Physical Performance	General Wellness	8880	2.69
Coenzyme Q10	Anxiety	Stress & Mood	8880	2.69
Thiamin	Anxiety	Stress & Mood	8880	1.39
Thiamin	Obesity	Metabolic Health	8880	1.39
Thiamin	Creatinine	General Wellness	8880	1.39
Thiamin	Microbiome	Gut Health	8880	1.39
Thiamin	Weight Loss	Metabolic Health	8880	1.39
CoQ10	Fertility	Fertility	8100	4.63
Lion's Mane Mushroom	Nerve	General Wellness	7260	3.26

Cite this report

Suggested citation: Healthy Aging Atlas Research Team. Supplement Evidence Density Map 2026. Healthy Aging Atlas. Published 2026-06-15. https://healthyagingatlas.com/research/evidence-density-map-2026/

Download the CSV or review the methods page before reusing the headline number. The denominator is the cleaned matrix after removing editorial rejects and a confirmed category-as-goal artifact.

Resource	U R L
Report URL	https://healthyagingatlas.com/research/evidence-density-map-2026/
Methods page	https://healthyagingatlas.com/research/evidence-density-map-2026/methods/
Download CSV	https://healthyagingatlas.com/downloads/evidence-density-map-2026.csv

Important limitations

This is an evidence-density map, not a clinical recommendation engine.
RCT count does not measure trial quality, sample size, duration, risk of bias, or whether the dose matches products on the market.
The matrix uses search and evidence proxies to identify marketed supplement-goal pairings; it is not a legal audit of every brand label or advertisement.
The PubMed snapshot reflects the HAA matrix available at generation time. New studies can change the evidence density over time.
Zero mapped RCTs means no RCT was mapped in this dataset after cleanup. It does not prove no trial exists anywhere.

Common Questions

Frequently Asked Questions

Does zero mapped RCT evidence mean a supplement does not work?

No. It means this matrix did not map a published human randomized controlled trial for that supplement-goal pairing after cleanup. It is a research-density signal, not a proof of ineffectiveness.

Why count RCTs instead of only meta-analyses?

RCT counts show the underlying trial density. Meta-analyses can be useful, but they may pool small or heterogeneous trials. HAA reports both signals separately.

Can this report be used for medical decisions?

No. It is an educational research map. Supplement choices should be discussed with a qualified healthcare professional, especially for pregnancy, chronic disease, or medication use.

Why is this not a recommendation list?

The report counts mapped human evidence density by supplement-goal pairing. It does not rank products by benefit, safety, dose, trial quality, or suitability for any individual.

How often can these numbers change?

They can change whenever HAA refreshes the evidence matrix or when new human trials and reviews are mapped. The published report should be cited as a June 15, 2026 snapshot.

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Primary Sources

Citations & Research

[1]Supplement Evidence Density Map 2026 CSVSource
[2]Evidence Density Map methodsSource

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Supplement Evidence Scorecard