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Palm oil: cholesterol, vitamin A and refining

The clearest measurable effect of palm oil is on LDL cholesterol. Compared with oils lower in saturated fat, it raised LDL cholesterol by 0.24 mmol/L across clinical trials, and by 0.31 mmol/L when only the randomised trials were counted. Two later meta-analyses split on this. One found a rise of 0.20 mmol/L against monounsaturated oils and 0.44 against polyunsaturated ones, on evidence it rated low to moderate. The other pooled 11 trials in 547 people and found no significant change in LDL at all. So the direction is likely and the size is argued over. Whether any of it ends in heart attacks is unknown. A review that went looking for heart disease and stroke found 5 studies, all of very low quality, and could not say either way. The vitamin A result is solid and narrow. Across 9 randomised trials red palm oil cut vitamin A deficiency by 45 percent, in children and adults already at risk of it. That is the unrefined red oil. The refined oil sold for cooking carries carotene only as a trace. The one pregnancy trial of palm tocotrienols gave women a 100 mg supplement capsule, so it tells you about that pill and nothing about the oil in your pan.

Every statement here is tied to a source. The badge says what kind of evidence stands behind it: A is a meta-analysis or systematic review, E is the position of an expert body without its own analysis. How we verify →

The numbers, per 100 g

USDA entrykcalProteinCarbsFiber
Oil, palm8840 g0 g0 g

These are the USDA entries that are palm oil, not foods made from it. Follow a name for the full profile and per-portion figures.

How much is actually in it

What your body absorbs

What cooking and storage change

What it does to your health

Safety, limits and interactions

What people believe that the data does not support

Who this works differently for

What is still unknown

The bottom line

If you cook with palm oil most days and your LDL is something you and your doctor watch, swapping it for an oil lower in saturated fat is the change with trials behind it. How much it moves depends on which meta-analysis you believe, and one of the three found nothing. The comparison runs the other way against hardened fats. Across 51 intervention studies, palm oil in place of trans fats gave higher HDL and lower apoB and triglycerides, so if the alternative on the label is partially hydrogenated fat, palm oil gives the better blood-fat profile of the two. These are blood markers, and whether they mean fewer heart attacks is unknown. Blood sugar did not move. Across 8 trials, fasting glucose on palm oil differed from olive or soybean oil by 0.04 to 0.05 mmol/L, no detectable difference in trials of 3 to 7 weeks in healthy adults. The review had nothing on people with diabetes. Refining is where the safety questions sit. EFSA found in 2016 that palm oils and palm fats carried the highest levels of glycidyl esters and 3-MCPD, contaminants that form when oil is refined at high heat. It set no safe level for glycidyl esters, because the glycidol they release is genotoxic, meaning it damages DNA, and carcinogenic. The same opinion recorded that glycidyl esters in palm oil halved between 2010 and 2015. For 3-MCPD, EFSA in 2018 raised its tolerable daily intake to 2.0 micrograms per kg of body weight, up from 0.8. In a Hong Kong survey of 290 foods, adults took in 10 to 26 percent of the tolerable intake set by JECFA. Infant formula gets its own evidence. In formula these contaminants come entirely from the refined oils, and levels are higher when the recipe uses a lot of palm oil. A meta-analysis of 13 formula studies found that palmitic acid in the position palm oil puts it gave babies less fat and calcium absorbed and harder stools, and lower bone mineral content at 3 and 6 months than formula without palmitic acid. The European paediatric nutrition committee reviewed 33 studies and found insufficient evidence that palm oil should be avoided in formula: the bone effects were short-lived and growth was unaffected, and the harder stools were real. If your baby struggles with hard stools on formula, that is a question for your paediatrician. Red palm oil is a food used against vitamin A deficiency, and this is where it helps. In a double-blind trial of 170 pregnant women in India, vitamin A deficiency after 8 weeks was 1.5 percent on red palm oil against 9.7 percent on groundnut oil. Anaemia stayed common in both groups, 80.6 against 96.7 percent, which describes how widespread it was in that population in India. Do not read it as a treatment for anaemia: across the 9 pooled trials, haemoglobin did not change. In those trials, 8 g a day or less already worked and more added nothing. All of those trials were run in people at risk of deficiency, so they say nothing about anyone already getting enough. The tocotrienol capsule in 299 first pregnancies was followed by pregnancy hypertension in 2.6 percent against 7.4 percent on placebo, a gap that did not reach significance. When 21 young adults ate palm olein for 30 days, tocotrienols were barely detectable in their blood. The EU has authorised no health claim for palm oil. It refused the claim that palm carotenes protect cells as antioxidants, the claim that a palm and oat oil emulsion helps with weight, and the claim that beta-palmitate raises calcium absorption, even though infant studies point that way. Even the basic numbers wobble. USDA gives 15.9 mg of vitamin E per 100 g and the British tables 33.1 mg, while both agree that saturated fat is close to half the oil, 47.8 and 49.3 g. One section is missing from this page. We found no evidence card on who should be careful with palm oil itself: nothing on allergy, on interactions with medicines or on an upper limit for the oil. That is a gap in our research, and it should not be read as a clean bill of health.

Sources

  1. plmo-c4-15 · reference dataset
    CoFID 17-039 Oil, palm — Vitamin E 33.12 mg · Fat 99.9 g · Carotene Tr || USDA SR Legacy 171015 Oil, palm — vitamin E 15.94 mg · saturated fat 49.3 g · fat 100 g per 100 g
    CoFID 2021, Public Health England / OGL v3.0, and USDA SR Legacy (FDC 171015) · checked 2026-09-23
  2. pmo-b5-16 · reference dataset
    CoFID 17-039 Oil, palm: vitamin E 33.12 mg, saturated fat 47.8 g per 100 g · USDA FDC 171015 Oil, palm: vitamin E 15.94 mg, saturated fat 49.3 g per 100 g
    CoFID 2021, Public Health England / OGL v3.0 · checked 2026-09-23
  3. pmo-b5-04 · meta-analysis of RCTs
    Overall, when trial results were pooled, the results indicated that RPO reduced the risk of VAD (relative risk (RR) (95% confidence interval (CI)) = 0.55 (0.37, 0.82), p = 0.003), increasedserum retinol levels in both children (p < 0.00001) and adults (p = 0.002) ... The results also showed that low level of PRO intake (≤8 g RPO) could increase serum retinol concentrations whereas PRO intake above 8 g did not lead to further increase of serum retinol concentrations.
    Nutrients, 2017 · checked 2026-09-23
  4. pmo-b5-12 · cross-sectional
    the levels of 3-MCPD fatty acid esters were high in biscuits, fats and oils, snacks and Chinese pastry with mean bound 3-MCPD levels of 440, 390, 270 and 270 μg kg⁻¹, respectively. ... the dietary exposures to 3-MCPD for average and high adult consumers were only 10% and 26% of the provisional maximum tolerable daily intake (PMTDI)
    Food Addit Contam Part A Chem Anal Control Expo Risk Assess, 2013 · checked 2026-09-23
  5. plmo-c4-01 · meta-analysis
    Palm oil significantly increased LDL cholesterol by 0.24 mmol/L (95% CI: 0.13, 0.35 mmol/L; I(2) = 83.2%) compared with vegetable oils low in saturated fat. This effect was observed in randomized trials (0.31 mmol/L; 95% CI: 0.20, 0.42 mmol/L) but not in nonrandomized trials (0.03 mmol/L; 95% CI: -0.15, 0.20 mmol/L; P-difference = 0.02).
    J Nutr, 2015 · checked 2026-09-23
  6. plmo-c4-02 · meta-analysis
    Intake of palm oil intake compared to oils rich in MUFA was associated with increased levels of total cholesterol (TC) [mean difference (MD)=0.27 mmol/L; 95% CI 0.08 to 0.45], LDL-C (MD=0.20 mmol/L; 95% CI 0.02 to 0.37) and HDL-C (MD=0.06 mmol/L; 95% CI 0.02 to 0.10). ... Even though palm oil increases marginally the level of serum lipids, the evidence is mostly of low to moderate quality.
    Asia Pac J Clin Nutr, 2020 · checked 2026-09-23
  7. plmo-c4-05 · umbrella review
    Replacement of polyunsaturated fatty-acid-rich oils (PUFAs) and monounsaturated FA-rich oils (MUFAs) with palm oil significantly increased low-density lipoprotein cholesterol (LDL-c), by 3.43 (0.44-6.41) mg/dL and 9.18 (6.90-11.45) mg/dL, respectively, and high-density lipoprotein cholesterol (HDL-c), by 1.89 (1.23-2.55) mg/dL and 0.94 (-0.07-1.97) mg/dL, respectively.
    Nutrients, 2021 · checked 2026-09-23
  8. plmo-c4-07 · systematic review
    There were insignificant differences in fasting glucose when compared to partially hydrogenated soybean oil [-0.15mmol/L (-0.46,0.16) P = 0.33, I2 = 48%], soybean oil [0.05mmol/L (-0.09,0.18) P = 0.49, I2 = 0%] and olive oil [0.04mmol/L (-0.09,0.17) P = 0.76, I2 = 0%].
    PLoS One, 2019 · checked 2026-09-23
  9. pmo-b5-01 · meta-analysis of RCTs
    Palm oil significantly increased LDL cholesterol by 0.24 mmol/L (95% CI: 0.13, 0.35 mmol/L; I(2) = 83.2%) compared with vegetable oils low in saturated fat. This effect was observed in randomized trials (0.31 mmol/L; 95% CI: 0.20, 0.42 mmol/L) but not in nonrandomized trials (0.03 mmol/L; 95% CI: -0.15, 0.20 mmol/L; P-difference = 0.02).
    J Nutr, 2015 · checked 2026-09-23
  10. pmo-b5-02 · meta-analysis of RCTs
    Intake of palm oil intake compared to oils rich in MUFA was associated with increased levels of total cholesterol (TC) [mean difference (MD)=0.27 mmol/L; 95% CI 0.08 to 0.45], LDL-C (MD=0.20 mmol/L; 95% CI 0.02 to 0.37) and HDL-C (MD=0.06 mmol/L; 95% CI 0.02 to 0.10). Similarly, for comparison with oils rich in PUFAs, palm oil showed increased in TC (MD=0.38 mmol/L; 95% CI 0.14 to 0.62), LDL-C (MD= 0.44 mmol/L; 95% CI 0.01 to 0.88) and HDL-C (MD=0.08 mmol/L; 95% CI 0.03 to 0.13).
    Asia Pac J Clin Nutr, 2020 · checked 2026-09-23
  11. pmo-b5-06 · meta-analysis of RCTs
    Seven randomised cross-over trials and one parallel trial were included. ... There were insignificant differences in fasting glucose when compared to partially hydrogenated soybean oil [-0.15mmol/L (-0.46,0.16) P = 0.33, I2 = 48%], soybean oil [0.05mmol/L (-0.09,0.18) P = 0.49, I2 = 0%] and olive oil [0.04mmol/L (-0.09,0.17) P = 0.76, I2 = 0%].
    PLoS One, 2019 · checked 2026-09-23
  12. plmo-c4-12 · systematic review
    The occurrence of MCPDEs and GEs in infant formula fully depends on the vegetable oils used in the recipe. High levels of these contaminants can be found when relatively high amounts of palm oils or fats are used. The mitigation of MCPDEs and GEs should therefore be performed on fats and oils before their application to infant formula recipes.
    Compr Rev Food Sci Food Saf, 2021 · checked 2026-09-23
  13. plmo-c4-13 · agency opinion
    The highest levels of GE, as well as 3-MCPD and 2-MCPD (including esters) were found in palm oils and palm fats, followed by other oils and fats. ... The Panel's review revealed that levels of GE in palm oils and fats halved between 2010 and 2015, due to voluntary measures taken by producers.
    EFSA, Process contaminants in vegetable oils and foods, 3 May 2016 · checked 2026-09-23
  14. pmo-b5-13 · agency position
    The panel applied the revised method to its reassessment of 3-MCPD and, as a result, it has increased its previous safe level two and a half fold.
    EFSA, 2018 · checked 2026-09-23
  15. plmo-c4-04 · meta-analysis
    Fifty-one studies were included. Intervention times ranged from 2 to 16 wk, and different fat substitutions ranged from 4% to 43%. ... Both favorable and unfavorable changes in CHD/CVD risk markers occurred when PO was substituted for the primary dietary fats, whereas only favorable changes occurred when PO was substituted for trans fatty acids.
    Am J Clin Nutr, 2014 · checked 2026-09-23
  16. plmo-c4-14 · regulatory register entry
    POL-HC-7651 Natural Palm Oil Carotenes Are antioxidants that protects the body's cells. Can protect you from free radicals which cause cell damage. Can protect your cells and tissues from oxidative damage. Can contribute to the total antioxidant capacity of the body. Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-7651, snapshot 2026-09-21 · checked 2026-09-23
  17. pmo-b5-08 · position paper
    We identified 12 relevant studies using PO and 21 studies using SN-2-palmitate. ... PO is associated with harder stools and SN-2-palmitate use may lead to softer stool consistency. Bone effects seem to be short-lasting. ... There is insufficient evidence to suggest that PO should be avoided as a source of fat in infant formulas for health reasons.
    J Pediatr Gastroenterol Nutr, 2019 · checked 2026-09-23
  18. pmo-b5-14 · regulatory decision
    POL-HC-7119 Formulated palm and oat oil emulsion Helps to eat less. Helps to reduce weight regain after dieting. Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-7119, snapshot 2026-09-21 · checked 2026-09-23
  19. pmo-b5-15 · regulatory decision
    POL-HC-6216 Beta-palmitate Beta-palmitate enrichment contributes to increase calcium absorption -/- Non-authorised
    EU Register on nutrition and health claims, claim POL-HC-6216, snapshot 2026-09-21 · checked 2026-09-23
  20. plmo-c4-08 · meta-analysis of RCTs
    the results indicated that RPO reduced the risk of VAD (relative risk (RR) (95% confidence interval (CI)) = 0.55 (0.37, 0.82), p = 0.003), increasedserum retinol levels in both children (p < 0.00001) and adults (p = 0.002), and increased β-carotene levels (p = 0.01). ... The results also showed that low level of PRO intake (≤8 g RPO) could increase serum retinol concentrations whereas PRO intake above 8 g did not lead to further increase of serum retinol concentrations.
    Nutrients, 2017 · checked 2026-09-23
  21. plmo-c4-09 · RCT
    A significantly lower proportion of women in the red palm oil group than in the control group had vitamin A deficiency (serum retinol levels < 0.7 mumol/L) after intervention (1.5% vs. 9.7%). The proportion of women having anemia was significantly lower (p < .01) in the red palm oil-supplemented group (80.6%) than in the control group (96.7%).
    Food Nutr Bull, 2003 · checked 2026-09-23
  22. plmo-c4-10 · meta-analysis
    Absorption of fat and calcium was higher, the Ca(2+) of fecal excretion was lower when the infant formula provided palmitic acid at the Sn-2 positions or without palmitic acid than that determined when formula containing palmitic acid at the Sn-1 and Sn-3 positions was given (P < 0.01).
    Zhonghua Er Ke Za Zhi, 2009 · checked 2026-09-23
  23. plmo-c4-11 · position paper
    PO is associated with harder stools and SN-2-palmitate use may lead to softer stool consistency. ... There is insufficient evidence to suggest that PO should be avoided as a source of fat in infant formulas for health reasons.
    J Pediatr Gastroenterol Nutr, 2019 · checked 2026-09-23
  24. pmo-b5-05 · RCT
    A total of 170 women were recruited at 16 to 24 weeks of gestation and randomly assigned to an experimental group that received red palm oil ... A significantly lower proportion of women in the red palm oil group than in the control group had vitamin A deficiency (serum retinol levels < 0.7 mumol/L) after intervention (1.5% vs. 9.7%).
    Food Nutr Bull, 2003 · checked 2026-09-23
  25. pmo-b5-07 · meta-analysis of RCTs
    Thirteen articles were included. ... CONCLUSION: Absorption of fat and calcium was lower, the Ca(2+) of fecal excretion was higher, the BMC was reduced, the incidence of hard stools increased when the infant formula provided the palmitic acid at the Sn-1 and Sn-3 positions as compared with using formula contained palmitic acid at the Sn-2 positions or without palmitic acid.
    Zhonghua Er Ke Za Zhi, 2009 · checked 2026-09-23
  26. pmo-b5-11 · RCT
    Out of 299 women, 151 were randomized into the TRF arm and 148 into the placebo arm. ... (4/151 or 2.6% in the TRF arm vs. 11/148 or 7.4% in the placebo arm, p = 0.058) ... With TRF supplementation, the relative risk (RR) of PIH was 0.36 (95% CI 0.12-1.09).
    Acta Medica (Hradec Kralove), 2013 · checked 2026-09-23
  27. plmo-c4-03 · meta-analysis
    A total of 11 articles involving 547 participants met the inclusion criteria. The pooled analysis revealed that palm oil increased the concentration of high-density lipoprotein cholesterol (WMD: 0.15 mmol/L; p<0.00001). Palm oil consumption had no significant effects on blood total cholesterol (WMD: -0.01 mmol/L; p=0.82) and LDL-c (WMD: -0.05mmol/L; p=0.10)
    Asia Pac J Clin Nutr, 2019 · checked 2026-09-23
  28. plmo-c4-06 · systematic review
    Our search retrieved 2,738 citations for stroke with one included study and 1,777 citations for coronary heart disease (CHD) with four included studies. ... The evidence for the outcomes of this review were all graded as very low.
    PLoS One, 2018 · checked 2026-09-23
  29. pmo-b5-03 · meta-analysis of RCTs
    A total of 11 articles involving 547 participants met the inclusion criteria. The pooled analysis revealed that palm oil increased the concentration of high-density lipoprotein cholesterol (WMD: 0.15 mmol/L; p<0.00001). Palm oil consumption had no significant effects on blood total cholesterol (WMD: -0.01 mmol/L; p=0.82) and LDL-c (WMD: -0.05mmol/L; p=0.10)
    Asia Pac J Clin Nutr, 2019 · checked 2026-09-23
  30. pmo-b5-09 · systematic review of observational studies
    Our search retrieved 2,738 citations for stroke with one included study and 1,777 citations for coronary heart disease (CHD) with four included studies. ... The evidence for the outcomes of this review were all graded as very low. ... The present review could not establish strong evidence for or against palm oil consumption relating to cardiovascular disease risk and cardiovascular disease-specific mortality.
    PLoS One, 2018 · checked 2026-09-23
  31. pmo-b5-10 · RCT
    Twenty-one healthy normocholesterolemic young adults, men and women, completed a randomized 30-d/30-d crossover comparison of the effect of palmolein and olive oil on plasma lipids. ... plasma total and low-density-lipoprotein (LDL) cholesterol were almost identical with the two oils ... Palmolein is rich in vitamin E, alpha-tocopherol, and especially tocotrienols, but the latter were barely detectable in plasma.
    Am J Clin Nutr, 1995 · checked 2026-09-23

Review. Reviewed on 2026-09-24 for evidence level, dose and population context, and claims a reader could misread. Bioma Learn has no human medical reviewer at this time, and we say so rather than invent one. Methodology. This is information, not medical advice.