FOR decades, palm oil has been cast as a dietary villain. Its roughly 50% saturated fat content led public health authorities to group it with butter, lard and coconut oil.
The message was simple: saturated fat raises LDL cholesterol, so palm oil must be bad for the heart. Science, however, has proved more nuanced than the slogans.
A recent scientific review revisits this question through a crucial but often overlooked lens: the sn-2 hypothesis. Its conclusion invites a long-overdue rethink of how we judge dietary fats. Not all saturated fats are created equal.
Palm oil is unique. Unlike animal fats, its saturated fatty acids, mainly palmitic acid, are not distributed randomly across the glycerol backbone.
More than 80% of the palmitic acid occupies the sn-1 and sn-3 positions of the triglyceride molecule, while the sn-2 position is dominated by oleic acid, a monounsaturated fat.
Why does that matter?
During digestion, enzymes preferentially cleave fatty acids from the sn-1 and sn-3 positions, leaving the sn-2 fatty acid intact as a 2-monoacylglycerol. That fatty acid, in this case oleic acid, is absorbed differently.
It does not form the insoluble calcium soaps that increase faecal fat loss and appears to influence lipoprotein metabolism in ways that simple saturated fat tables cannot predict.
What the lipid profiles show
The aforementioned scientific review explored a range of controlled human studies. Their headline finding is that palm oil does raise LDL cholesterol compared with unsaturated oils such as olive or canola, but significantly less than its palmitic acid content alone would predict.
Crucially, palm oil also raises HDL cholesterol, helping maintain a more favourable total cholesterol-to-HDL ratio than many other saturated fats.
In direct comparisons with partially hydrogenated vegetable oils, the old industrial source of trans fats, palm oil consistently produced a superior lipid profile.
That may be a low bar, but it illustrates an important point: judging palm oil solely by its saturated fat content is like judging a house by its brick count without considering its architecture.
The missing piece: Clinical outcomes
No op-ed should overstate the evidence.
The review acknowledges a major limitation. Most available evidence comes from intermediate biomarkers such as LDL, HDL and triglycerides rather than hard cardiovascular outcomes like heart attacks or strokes.
The sn-2 hypothesis is biochemically compelling, but proving that palm oil’s unique molecular structure translates into lower cardiovascular risk would require large, long-term clinical trials. Such studies are expensive and unlikely to be conducted anytime soon.
Context matters too.
Palm oil is rarely consumed in isolation. It appears in products ranging from margarines to instant noodles, often alongside refined sugars and low-fibre ingredients.
Blaming palm oil alone for the metabolic consequences of ultra-processed foods is intellectually lazy.
A cautious reappraisal
The sn-2 hypothesis does not transform palm oil into a health food. It does, however, challenge the simplistic equation that “all saturated fats are equally harmful”, an assumption that has shaped dietary guidelines for decades.
If the position of a fatty acid on the glycerol backbone influences its physiological effects, then food labelling and dietary advice, which still treat all palmitic acid as identical, are overdue for reappraisal.
The scientific review has done the field a service by bringing together a scattered body of research. The review suggests that, for the average person replacing trans fats or butter, palm oil is a reasonable alternative.
It may not lower LDL cholesterol as effectively as olive or canola oil, but it appears far less harmful than previously assumed.
In food systems where affordability, availability and oxidative stability matter, particularly across much of the Global South, that distinction carries real significance.
The takeaway
It’s time to retire simplistic food morality plays.
Fats are neither good nor evil. They are molecules whose structure determines their function.
The sn-2 hypothesis invites us to move beyond outdated fat phobia and towards a more sophisticated understanding of fat chemistry. ‒ July 21, 2026
The author is affiliated with the Tan Sri Omar Centre for STI Policy Studies at UCSI University and is an Adjunct Professor at the Ungku Aziz Centre for Development Studies, Universiti Malaya.
The views expressed are solely of the author and do not necessarily reflect those of Focus Malaysia.
