Fatty-acid notation 21:0 specifies 21 carbons and 0 double bonds. Listed forms remain separate. [1] [2]
This reference form does not represent every form included in the USDA quantity.
Description, source and attribution
Reference depiction: heneicosanoic acid. Formula C21H42O2; PubChem CID 16898; charge 0. This specified form does not represent every form or molecule included in the USDA quantity. The free-acid reference does not imply that food fatty acids are unesterified.
PubChem Compound 16898, 2D Structure. NCBI / National Library of Medicine. Source · Reuse terms
Source check: · No scientific editorial review.
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UNDERSTAND THE DATA
The nutrient, in context
How to read this ranking
This page compares SFA 21:0 (SFA 21:0), in g per 100 g of food.
Chemical forms and measurement methods remain separate. “Not reported” means a value is unavailable, not that the food contains zero. A food’s rank does not determine your individual needs or diagnose a deficiency.
Intake guidance
There is no validated NIH ODS fact sheet for this identity in Bitameans’ published version. We do not assign another nutrient’s recommendations to this form. An absent fact sheet does not mean that no upper intake limit exists.
Identity and structure sources
- PubChem Compound 16898: Heneicosanoic Acid · Accessed 2026-09-13
- USDA FoodData Central: Foundation Foods Documentation · Accessed 2026-09-13
