Food Data Insights

What are the healthiest oils for cooking, based on their fatty acid content?

Published on Oct. 7, 2025 by Florine Duval, PhD

πŸ”ŽπŸ³ What are the healthiest oils and fats for cooking? Let’s dive into the molecular composition and stability of lipids to find out:

Oils and fats are mostly made of triglycerides.

A triglyceride consists of glycerol that connects 3 fatty acids together.

Fatty acids consist of a carboxylic acid head with a highly variable carbon chain (variable number of Carbon atoms and variable number of Hydrogen atoms attached to them).

General structure of a fatty acid

Legend:

βšͺHydrogen πŸ”΄Oxygen ⚫Carbon

 

🟩🟧πŸŸ₯🟫 4 categories of fatty acids:

 

🟩 Saturated fatty acids (SFA):

Zero pair of Carbon atoms misses Hydrogen atoms

Schematic structure of a saturated fatty acid

 

🟧 Monounsaturated fatty acids (MUFA):

One pair of Carbon atoms misses Hydrogen atoms

Schematic structure of a monounsaturated fatty acid

 

πŸŸ₯ Polyunsaturated fatty acids (PUFA):

Multiple pairs of Carbon atoms miss Hydrogen atoms

Schematic structure of a polyunsaturated fatty acid

 

🟫 Trans fatty acids (TFA):

One or multiple pairs of Carbon atoms miss Hydrogen atoms on opposite sides

Schematic structure of a trans fatty acid

 

━━━━━━━━━━━━━━━━━━━━━━━━━━━

πŸ”₯More missing H atoms

βž™πŸ”₯More reactive sites

βž™βž™πŸ”₯Less stable fatty acid

βž™βž™βž™πŸ”₯More sensitive to heat

βž™βž™βž™βž™πŸ”₯More harmful substances

βž™βž™βž™βž™βž™πŸ”₯Less healthy to cook with

━━━━━━━━━━━━━━━━━━━━━━━━━━━

 

So, what’s the best oil to cook with?

➑️ From the perspective of chemical stability, the healthiest oils for cooking are the ones with the least πŸ”₯PUFA.

Which are the healthiest fats and oils exactly?

πŸ“Š Time to take a closer look at the composition of available oils and fats.

I created a chart that shows, for each one of 24 oils and fats, the amount of SFA, MUFA, PUFA and TFA relative to the total fat. The products are sorted by increasing PUFA, so products that rank higher tend to be more stable.

Feel free to explore the interactive chart below!

πŸ’¬ What’s the best oil to cook with in your view? Is your own choice based on PUFA content or other factors?

 

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