Methodology & Sources

This page documents where our data comes from, how we verify it, and what licenses apply. If you want to check our work, everything you need is here.

How We Measure Heat

Scoville Heat Units (SHU) are determined through High Performance Liquid Chromatography (HPLC), which measures capsaicinoid concentration. We report ranges rather than single values because individual peppers vary based on growing conditions, soil, sunlight, and genetics. Our reported ranges represent the consensus across multiple published measurements.

When multiple sources disagree, we default to peer-reviewed publications over manufacturer claims, and Guinness-verified measurements for world record peppers. See our Scoville Scale guide for a complete explanation.

Primary Data Sources

USDA FoodData Central
Public Domain (CC0)
fdc.nal.usda.gov
Nutritional composition data, basic pepper identification. We use this for all nutrition facts tables.
Wikidata
Creative Commons Zero (CC0)
wikidata.org
Species classifications, origin data, synonym lists, Scoville references with citations. Machine-readable structured data.
Wikipedia
CC BY-SA 3.0
wikipedia.org
Historical context and general reference. We rewrite all Wikipedia-sourced content in our own words and verify claims against primary sources.
Chile Pepper Institute (NMSU)
Reference only
cpi.nmsu.edu
Species verification, cultivar identification, peer-reviewed Scoville measurements. The gold standard for pepper taxonomy.
Peer-reviewed Journals
Reference only
Various (PubMed indexed)
Capsaicin measurement studies, Scoville verification. Key papers: Bosland & Votava (2012), Bray (2023).
Guinness World Records
Reference only
guinnessworldrecords.com
Official world record heat measurements for Pepper X, Carolina Reaper, Trinidad Moruga Scorpion.
Original Research
Our own work
knowthepepper.com
Growing guides from our trial gardens, culinary testing, substitution ratio verification, comparative tasting notes.

Our Verification Process

1
Primary Source Check
Every factual claim is traced to a published source — government database, peer-reviewed paper, or verified record.
2
Cross-Reference
SHU ranges are verified across at least two independent sources. Discrepancies are noted in the content.
3
Experience Validation
Growing tips and culinary advice are tested in our trial gardens and kitchens before publication.
4
Editorial Review
All content passes through editorial review for accuracy, tone, internal linking quality, and Schema markup.
5
Annual Refresh
Published content is reviewed annually. SHU data is updated when new measurements are published.

Licensing Summary

Safe to use commercially (CC0 / Public Domain): USDA FoodData Central, Wikidata structured data, our original content.
Reference only (rewritten in our words): Chile Pepper Institute publications, peer-reviewed journals, Guinness records, Wikipedia articles.
Never copied directly: Copyrighted images, proprietary databases, trademarked varietal descriptions from seed companies.