Palm Oil

Palm oil's properties — both helpful and less helpful — come down to a handful of key compounds.

• Saturated fatty acids (mainly palmitic acid): Make up roughly 50% of palm oil's fat content. Linked to higher LDL ("bad") cholesterol when they displace unsaturated fats in the diet.
• Monounsaturated fatty acids (mainly oleic acid): Make up about 39% of the fat. Considered more heart-neutral than saturated fats.
• Polyunsaturated fatty acids: A smaller fraction (around 10%). Include some linoleic acid (an omega-6 fat).
• Tocotrienols: A subfamily of vitamin E compounds with an unsaturated molecular "tail" that makes them structurally distinct from the more common tocopherol form. Found at unusually high concentrations in palm oil. Early research suggests antioxidant, neuroprotective, and anti-inflammatory potential, primarily in supplement or enriched-extract form.
• Tocopherols: The more common form of vitamin E found across many plant oils. Support antioxidant protection and help stabilize the oil during heating.
• Carotenoids (beta-carotene, alpha-carotene, lycopene) — red palm oil only: These pigmented plant compounds give unrefined palm oil its vivid red-orange color. Beta- and alpha-carotene are provitamin A compounds, meaning the body converts them into active vitamin A. Largely destroyed by refining.
• Phytosterols: Plant compounds structurally similar to cholesterol that can modestly compete with cholesterol absorption in the gut. Present in palm oil, but their benefit may be offset by the oil's saturated fat content.

Heart health and cholesterol

This is where the clearest and most important evidence sits. Palm oil is roughly half saturated fat, with about 7 g of saturated fat per tablespoon. Human data consistently show that regularly eating palm oil raises LDL ("bad") cholesterol — a key risk factor for cardiovascular disease — particularly when palm oil displaces unsaturated oils like olive or canola in the diet.

Harvard medical experts describe palm oil as sitting between two extremes: it is less harmful than industrial trans fats (partially hydrogenated oils) and probably better than butter for LDL, but it is not as heart-healthy as liquid unsaturated plant oils. When palm oil replaces trans fats, blood lipids may modestly improve; when it replaces olive or canola oil, LDL generally worsens.

A 2022 review in Food Chemistry noted that palm oil contains antioxidants (tocotrienols and tocopherols) and has shown some cardioprotective signals in certain studies, but acknowledged this evidence is mixed, often mechanistic, and highly dependent on what palm oil is replacing in the overall diet. The consensus among cardiology-oriented and academic nutrition bodies remains: favor liquid unsaturated plant oils over palm oil for everyday cooking.

Bottom line on heart health: Occasional use is unlikely to be harmful for most people. Regular, high-quantity use — especially as a replacement for olive or canola oil — is not recommended.

Digestive health and microbiome

Palm oil has no dietary fiber, so it does not directly feed the gut microbiome (the community of beneficial bacteria living in your digestive tract) the way whole plant foods do. High saturated fat diets have been associated in some research with less favorable gut microbiome profiles, though the effect of palm oil specifically — compared with, say, dairy saturated fats — is not well characterized in large human trials. For digestive health, whole-food fat sources (nuts, seeds, avocado) and fiber-rich foods remain the stronger evidence-based choices.

Blood sugar and metabolism

A recent review described palm oil fractions as having potential antidiabetic properties, partly attributed to their tocotrienols and the structural characteristics of palm oil triglycerides (the form most dietary fat takes in the bloodstream). Proposed mechanisms include reduced oxidative stress and possible improvements in insulin sensitivity. However, most of this data comes from animal models or small mechanistic studies. Major clinical databases do not currently classify palm oil as an established tool for blood sugar management, and no large human trials confirm that palm oil improves glycemic outcomes relative to unsaturated oils. Evidence here is best described as emerging and speculative.

Inflammation and recovery

Palm oil contains saturated fats, which at high dietary levels are associated with elevated inflammatory markers in human studies. It also contains antioxidant compounds — particularly tocotrienols — that can counter oxidative stress (cellular damage from unstable molecules called free radicals). Whether the anti-inflammatory potential of tocotrienols in typical cooking amounts meaningfully outweighs the pro-inflammatory effect of the saturated fat in the same oil has not been convincingly resolved by large human trials. For an anti-inflammatory dietary pattern, most evidence still points toward emphasizing unsaturated plant oils, omega-3 fats, and whole plant foods.

Vitamin A status (red palm oil only)

This is the one area where human evidence is genuinely strong — but it applies specifically to red, unrefined palm oil, not the refined pale oil in most processed foods. Clinical trials have shown that adding red palm oil to the diets of children and pregnant women in regions with widespread vitamin A deficiency can significantly raise vitamin A blood levels and reduce rates of deficiency. WebMD classifies palm oil as likely effective for this purpose.

Typical clinical doses used in these studies range from 6–9 g per day in children to 7–12 g per day in adults for up to six months. This benefit is not transferable to refined palm oil, and in higher-income settings with diverse diets and fortified foods, vitamin A deficiency is rare. People following WFPB diets can obtain provitamin A from orange and yellow vegetables, leafy greens, and other whole plant foods without needing to add oil.

Brain health and tocotrienols

Early experimental and clinical work suggests tocotrienols from palm oil may have neuroprotective effects, including potential benefits for white matter lesions (areas of damaged brain tissue) and cognitive function. However, the studies reporting these effects typically use concentrated tocotrienol-rich supplements rather than everyday palm oil, and the evidence base is still developing. Routine cooking use of palm oil should not be expected to deliver meaningful brain-protective effects based on current evidence.

Myth: Palm oil is a "superfood" packed with nutrients. Fact: Red, unrefined palm oil is genuinely rich in provitamin A carotenoids and tocotrienols, and for populations at risk of vitamin A deficiency it plays a real clinical role. But the highly refined palm oil in most processed foods retains very little of this nutritional profile, and the saturated fat content applies to both forms.

Myth: Palm oil is fine to use freely because it is plant-based. Fact: "Plant-based" does not automatically mean low in saturated fat or heart-healthy. Palm oil and coconut oil are the two most saturated of all commonly used plant oils. Being plant-derived does not change the evidence on LDL cholesterol.

Myth: Palm oil is just as bad as trans fats. Fact: Industrial trans fats (partially hydrogenated oils) are universally considered the most harmful dietary fat, raising LDL and lowering HDL simultaneously. Palm oil raises LDL but does not lower HDL, and it contains no trans fats. It is less harmful than trans fats, though still less favorable than unsaturated plant oils for heart health.