# Supplement Evidence Dataset v1

## Dataset Description

A curated, evidence-graded dataset of 64+ supplement products across 14 categories, built for researchers, developers, and consumers who want transparent, structured supplement data grounded in clinical evidence.

Each row represents a single supplement product with standardized fields for elemental dose, cost-per-day, third-party certification status, evidence grade, and PubMed citation IDs linking to the underlying clinical trials and systematic reviews.

**Source:** [Verified Supplement Data](https://verifiedsupplementdata.com) — an evidence-based supplement comparison database with 116+ pages, structured JSON-LD schema, and PubMed-cited evidence grades.

## Methodology

1. **Product selection:** Products were selected based on market availability (Amazon US), brand reputation, third-party certification status, and relevance to clinical dosing targets.
2. **Dosing:** All doses are reported as elemental/active ingredient per serving (not compound weight). For magnesium glycinate, this is elemental magnesium; for iron bisglycinate, this is elemental iron; for omega-3, this is combined EPA+DHA.
3. **Cost-per-day:** Calculated as `(price / servings_per_container) * servings_needed_for_clinical_dose`. Prices reflect Amazon US pricing as of March 2026.
4. **Evidence grading:** Each category receives an evidence grade based on the highest level of available evidence:
   - **strong** — Supported by systematic reviews, meta-analyses, or large RCTs with consistent findings
   - **moderate** — Supported by individual RCTs or observational studies with plausible mechanisms
   - **limited** — Preliminary evidence, mechanistic rationale, or expert consensus only
5. **Third-party certifications:** Reported exactly as stated on the product label (USP Verified, NSF Certified for Sport, IFOS 5-Star, Informed Sport, etc.).
6. **PubMed citations:** PMID numbers link to the primary clinical evidence supporting each category's evidence grade and use case.

## Column Definitions

| Column | Type | Description |
|---|---|---|
| `name` | string | Full product name as listed by manufacturer |
| `brand` | string | Brand/manufacturer name |
| `category` | string | Supplement category slug (e.g., `magnesium-glycinate`, `omega-3`) |
| `form` | string | Specific form/type (e.g., `bisglycinate`, `ubiquinol`, `rTG triglyceride`) |
| `dose_per_serving` | number | Elemental/active dose per serving |
| `dose_unit` | string | Unit of measurement (mg, mcg, IU, g, etc.) |
| `serving_size` | string | Physical serving size description |
| `servings_per_container` | integer | Number of servings in the container |
| `price_usd` | number | Current retail price in USD (Amazon US) |
| `cost_per_day_usd` | number | Calculated daily cost at effective clinical dosing |
| `third_party_certification` | string | Third-party testing/certification (or "None") |
| `evidence_grade` | string | Evidence strength: `strong`, `moderate`, or `limited` |
| `primary_use` | string | Primary clinical use case(s) |
| `pubmed_ids` | string | Semicolon-separated PubMed IDs (PMIDs) for supporting evidence |
| `editorial_pick` | string | Editorial award category (best-value, quality, budget, plant-based, convenience) or blank |
| `amazon_asin` | string | Amazon Standard Identification Number for product lookup |

## Categories Covered

- Ashwagandha (KSM-66, Sensoril, Shoden extracts)
- Biotin
- Calcium Citrate
- Collagen Peptides
- CoQ10 (Ubiquinone vs. Ubiquinol)
- Creatine Monohydrate
- Iron Bisglycinate
- L-Theanine
- Magnesium Glycinate
- Methylfolate (L-5-MTHF)
- Multivitamins
- Omega-3 Fish Oil (TG vs. EE forms)
- Protein (Whey & Plant)
- Tongkat Ali
- Vitamin B12 (Methylcobalamin vs. Cyanocobalamin)
- Vitamin C
- Vitamin D3

## Citation

If you use this dataset in research or applications, please cite:

```
Verified Supplement Data. (2026). Supplement Evidence Dataset v1.
https://verifiedsupplementdata.com
Dataset: https://github.com/verifiedsupplementdata/supplement-evidence-dataset
```

## License

This dataset is released under the [Creative Commons Attribution 4.0 International (CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/) license.

You are free to share and adapt this dataset for any purpose, including commercial use, as long as you provide attribution.

## Updates

This dataset is updated monthly. Prices are verified against Amazon US listings. New products and categories are added as they are reviewed on verifiedsupplementdata.com.

## Contact

- Website: [verifiedsupplementdata.com](https://verifiedsupplementdata.com)
- Data methodology: [verifiedsupplementdata.com/methodology/](https://verifiedsupplementdata.com/methodology/)
- Editorial standards: [verifiedsupplementdata.com/about/](https://verifiedsupplementdata.com/about/)