Fractionated palm oil is palm oil that has been physically separated into two or more parts based on melting point. Through a process of controlled cooling, the oil splits into a liquid fraction called olein and a solid fraction called stearin. Food manufacturers use these fractions instead of whole palm oil because each one behaves differently in recipes, giving more precise control over texture, spreadability, and shelf stability.
How Fractionation Works
The process is surprisingly simple in concept. A large batch of palm oil, sometimes up to 100 tons, is slowly cooled in a crystallizer. As the temperature drops, the more saturated fats in the oil begin to form crystals while the less saturated fats stay liquid. The cooling rate is deliberately slow, typically between 0.2 and 3°C per hour, to ensure the crystals form evenly throughout the batch. Once crystallization is complete, the mixture is filtered or run through a centrifuge to separate the solid crystals (stearin) from the liquid (olein).
This method is called “dry fractionation” because it uses no chemicals or solvents. It’s purely a physical separation. If the crystallization doesn’t go as planned, the whole batch can simply be reheated back to liquid and the process started over. The fractions can also be fractionated again to produce even more specialized products, like “super olein” with very low melting points.
Olein vs. Stearin: Two Very Different Products
Whole palm oil melts between 32°C and 39°C, which means it’s semi-solid at room temperature. The two fractions sit on opposite ends of the spectrum. Palm olein melts between about 19°C and 24°C, keeping it liquid at typical kitchen temperatures. Further-fractionated oleins can melt as low as 12°C, making them behave more like a traditional cooking oil. Palm stearin, on the other hand, is firmer and more saturated, with a higher melting point than whole palm oil.
This difference in melting behavior is what makes fractionation useful. A single raw ingredient, palm oil, gets split into components that serve completely different purposes in food manufacturing.
Where You’ll Find It on Ingredient Labels
Fractionated palm oil shows up in a wide range of processed foods. Palm olein is commonly used as a frying oil and in cooking oil blends, particularly in Asia and Africa, where it’s one of the most widely consumed liquid fats. Palm stearin is used to add firmness and structure to products like margarine, shortening, bread, and baked pastries. It can replace partially hydrogenated oils (trans fats) in many applications because it provides a similar solid texture without the hydrogenation process.
You might also see “fractionated palm kernel oil” on labels, which is a different product. Palm kernel oil comes from the seed inside the palm fruit rather than the fruit’s flesh, and it has a very different fatty acid profile. Fractionated palm kernel oil is common in chocolate coatings, confections, and non-dairy creamers because of its sharp melting point, which gives that clean “melt in your mouth” quality.
Shelf Life and Stability
One practical advantage of fractionation is that it can improve how long the oil lasts. When stored at room temperature in the dark, refined palm olein has an estimated shelf life of about 9 months, while refined palm stearin lasts around 12 months. For comparison, crude (unrefined) palm oil lasts roughly 6 months under the same conditions.
Stearin’s longer shelf life comes down to chemistry: it contains a higher proportion of saturated fatty acids, which are less vulnerable to oxidation. Oxidation is the process that makes oils go rancid. Palm oil in general resists rancidity better than many other vegetable oils like soy or canola, and the stearin fraction takes that natural advantage a step further.
Nutritional Considerations
Fractionation doesn’t add or remove anything chemically. It concentrates what’s already there. That means palm stearin is higher in saturated fat than whole palm oil, while palm olein is lower in saturated fat and higher in unsaturated fat. If you’re reading a nutrition label, the saturated fat content of a product made with palm stearin will generally be higher than one made with palm olein, even though both started as the same oil.
Palm oil’s dominant fatty acid is palmitic acid, a 16-carbon saturated fat. It makes up roughly 44% of whole palm oil’s fatty acid content. Stearin concentrates this, while olein dilutes it. The health implications mirror what you’d expect: higher saturated fat intake is associated with higher LDL cholesterol levels, so the fraction used in a product matters for its nutritional profile.
Fractionated palm oil is not the same thing as MCT oil, though both can come from palm sources. MCT oil is typically derived from palm kernel oil (not palm oil) and consists almost entirely of medium-chain fatty acids with 8 or 10 carbon atoms. Regular palm oil contains virtually none of these shorter-chain fats. If a product label says “fractionated palm oil,” it’s a fraction of standard palm oil, not an MCT product.
Environmental and Sustainability Context
Fractionated palm oil carries the same environmental concerns as all palm oil. Palm cultivation is a major driver of tropical deforestation, particularly in Southeast Asia. The Roundtable on Sustainable Palm Oil (RSPO) operates a voluntary certification program with criteria focused on no deforestation, no peat destruction, and no exploitation of workers or communities. As of late 2024, the RSPO adopted updated principles and criteria that will become binding in November 2025.
If sustainability matters to you, look for RSPO certification on products containing any form of palm oil. The certification applies to the supply chain rather than the specific fraction, so a product made with RSPO-certified palm stearin or olein means the underlying palm oil met those environmental and social standards. That said, certification covers a relatively small share of global palm oil production, and the effectiveness of these programs in actually protecting forests remains an active area of debate.