Data sources & licences
Last updated: June 2026
Alex.'s coaching is grounded in published research and official nutrition data. We use each source under its licence and credit it below. Nutrition values, research findings and exercise information come from the sources listed here; Alex. then writes its own guidance in its own words. Alex. is not medical advice.
McCance & Widdowson's CoFID 2021
Open Government Licence v3.0 (© Crown copyright)UK generic whole-food nutrition (the British reference)
Contains data from McCance and Widdowson's The Composition of Foods Integrated Dataset (CoFID), 2021, Public Health England. Contains public sector information licensed under the Open Government Licence v3.0.
USDA FoodData Central
Public domain (CC0 1.0)Whole-food nutrition (fallback when CoFID has no match)
Nutrition data from FoodData Central, U.S. Department of Agriculture (public domain).
Open Food Facts
Open Database License (ODbL) v1.0Branded / packaged UK food nutrition
Branded product data © Open Food Facts contributors, made available under the Open Database License (ODbL).
wger
CC BY-SA (per entry)Exercise library (names, muscles, equipment)
Exercise data from wger.de, licensed under Creative Commons Attribution-ShareAlike (CC BY-SA).
PubMed (NCBI / NLM)
Public metadata; abstracts © their publishersPeer-reviewed research used to ground coaching advice
Research metadata courtesy of the U.S. National Library of Medicine (PubMed). Abstracts © their respective publishers.
OpenAlex
CC0 metadataOpen academic works (breadth + recency)
Open scholarly metadata from OpenAlex (CC0).
Crossref
Open bibliographic metadata (facts)Publication + DOI metadata
Bibliographic metadata from Crossref.
ISSN · ACSM · Cochrane · WHO
Public metadata via PubMedPosition stands & guidelines (pulled as papers via PubMed)
Guideline and position-stand references retrieved via PubMed (U.S. National Library of Medicine).
Trademarks and source names belong to their respective owners. Listing a source here does not imply that the source endorses Alex. If you believe any data is used incorrectly, contact us at hello@getalex.app.