Comparison of palmolein and olive oil: effects on plasma lipids and vitamin E in young adults

Choudhury, N; Tan, Lit Yeen; As, Truswell

doi:10.1093/ajcn/61.5.1043

Cited by 120 publications

(77 citation statements)

References 55 publications

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“…Palmolein contains more saturated and less MUFA (Table 3). We found that total and LDL cholesterols were lower on canola oil than on palmolein (Truswell et al, 1992) and on higholeic sun¯ower oil than on palmolein (Choudhury et al, 1997) as predicted by the Keys et al (1957) equation, but they were not lower on olive oil than on palmolein (Choudhury et al, 1995). HDL cholesterols averaged 0.10 mmol/l higher on palmolein than on each of the three MUFA oils.…”

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confidence: 67%

Monounsaturated oils do not all have the same effect on plasma cholesterol

Choudhury

1998

Eur J Clin Nutr

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Evidence assembled here indicates that when olive oil forms a major part of dietary fat in controlled human experiments, total and LDL-cholesterols are somewhat higher than when the same amount of fat is one of the modern predominantly monounsaturated oils: low erucic rapeseed or high oleic sun¯ower oil. Oils rich in monounsaturated fatty acids thus do not all have the same effect on plasma cholesterol. This phenomenon is explicable by consideration of the content of other fatty acids and the non-saponi®able fractions of the different monounsaturated oils. It helps to explain the discrepancy that has existed between the classic experiments (using olive oil), which found monounsaturated oils`neutral', and some of the more recent experiments which found them more cholesterol-lowering than carbohydrates. Four published meta-analyses are reviewed. The three which included most of the published experiments show that monounsaturated fatty acids (MUFA) have less plasma cholesterol-lowering effect than polyunsaturated fatty acids.

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confidence: 67%

Monounsaturated oils do not all have the same effect on plasma cholesterol

Choudhury

1998

Eur J Clin Nutr

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“…Whether the effect of regioselective distribution of these fatty acids can be extended to other fatty acids deserves particular attention. Choudhury et al, (1995) show that synthetic fats have fatty acids randomly attached to the glycerol molecule. This contrasts with natural fats, which have a specific fatty acid distribution and the positions of these fatty acids along the glycerol molecule can modulate the effect of different fats on cholesterol metabolism.…”

Section: Discussionmentioning

confidence: 97%

Effect of ingestion of virgin olive oil on human low-density lipoprotein composition

Fitó²,

et al. 2002

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Objective: To measure the incorporation of oleic acid and antioxidants (phenols and vitamin E) to low density lipoprotein (LDL) after acute and short-term ingestion of virgin olive oil. To study whether this incorporation contributes to an increase in LDL resistance to oxidation. Setting: Department of Food and Nutrition, University of Barcelona, Spain and Department of Lipids and Cardiovascular Epidemiology, IMIM, Barcelona, Spain. Subjects: Sixteen healthy volunteers aged 25 -65 y. Design and interventions: To observe the change in the fatty acid profile, vitamin E, phenolic compounds and LDL oxidationrelated variables after the postprandial phase and after daily ingestion of olive oil for one week. Results: Few changes were observed in the postprandial phase. However, after a week of olive oil consumption there was an increase in oleic acid (P ¼ 0.015), vitamin E (P ¼ 0.047), phenolics (P ¼ 0.021) and lag time (P ¼ 0.000), and a decrease in the maximum amount of dienes (P ¼ 0.045) and oxidation rate (P ¼ 0.05). Conclusion: After ingestion of virgin olive oil, an increase in antioxidants and oleic acid in LDL was observed as well as an improvement of LDL resistance to oxidation. Our results support the idea that daily ingestion of virgin olive oil could protect LDL from oxidation.

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“…This was ®rst hypothesized by Threfall (1971). In a study comparing palmolein Lipemia from palm and oleic acid-rich sun¯ower oils C Cuesta et al and olive oil, Choudhury et al (1995) reported that tocotrienols wee barely detectable in plasma. Therefore, in the present study, the plasma a-tocopherol concentrations seen following the palmolein period could be due to the conversion of tocotrienols to a-tocopherols.…”

Section: Serum Lipid Lipoprotein and Apo Concentrationsmentioning

confidence: 99%

“…This study represents a ®rst test of the hypothesis that 16:0 can be hypercholesterolemic compared to 18:1 in postmenopausal women with initially high TC and LDL-C values and with high intakes of dietary cholesterol (b 300 mgad). In addition, the peroxidative status of plasma and LDL at the end of each dietary period was investigated since both oils are rich in antioxidants (Choudhury et al, 1995) but palmolein was particularly rich in tocotrienols and showed a higher saturation index.…”

Section: Introductionmentioning

confidence: 99%

Lipoprotein profiles and serum peroxide levels of aged women consuming palmolein or oleic acid-rich sunflower oil diets

et al. 1998

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Objective: To investigate the hypercholesterolemic effects of a dietary exchange between 16:0 and 18:1 while 18:2 was at relatively lower level ( % 4%) in aged women with initially high total serum cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) values and with high intakes of dietary cholesterol. Design: Subjects were assigned to two consecutive 28 d periods. In the ®rst period all subjects followed an oleic acid-rich diet in the form of oleic acid-rich sun¯ower oil. This was followed by a second period rich in palmitic acid in the form of palmolein. Nutrient intakes, serum lipids, lipoproteins, antioxidant vitamins, peroxides and LDL-peroxides were measured at two dietary periods. Setting: Instituto de Nutricio Ân y Bromatologõ Âa (CSIC), Departamento de Nutricio Ân y Bromatologõ Âa I (Nutricio Ân) and Seccio Ân Departamental de Quõ Âmica Analõ Âtica, Universidad Complutense, Madrid, Spain. Results: The palmolein period led to an increase in TC (P`0.001; 17.7%) and serum apolipoprotein (Apo) B levels (P`0.001; 18.0%). LDL-C and LDL-Apo B concentrations were higher (P`0.001, 4.33AE 0.94 mmolaL and P`0.01, 1.08 AE 0.20 gaL, respectively) following this period than following the oleic acid-rich sun¯ower oil diet (3.56 AE 0.85 mmolaL, 0.93 AE 0.16 gaL, respectively). No signi®cant differences were observed in the TCahigh density lipoprotein cholesterol (TCaHDL-C) ratio between the two dietary periods. Serum and LDLperoxides were lower (P`0.01, 49.5%, and P`0.001, 69.0%, respectively) after the palmolein diet than after the oleic acid-rich sun¯ower oil diet. The palmolein diet signi®cantly increased TC, LDL-C, Apo B, VLDLApoB, LDL-ApoB in women with TC ! 6.21 mmolaL or with TC`6.21 mmolaL, but the increase in Apo B, LDL-C and LDL-Apo B was greater among the women with high TC. The palmolein diet increased HDL-C in women with high or with low TC but this rise was on the borderline of statistical signi®cance (P 0.06) only in normocholesterolemics. Serum and LDL-peroxides tended to be higher in women with TC ! 6.21 mmolaL than in women with TC`6.21 mmolaL, but palmolein decreased serum and LDL-peroxide in hypercholesterolemics more than in the normocholesterolemics, resulting in serum and LDL-peroxide levels which theoretically are more adequate. Conclusions: Though palmolein increased LDL-C concentrations, it better protected LDL particles, mainly in women with high TC, against peroxidation than did oleic acid-rich sun¯ower oil. Sponsorship: This study was supported by the Spanish Comision Interministerial de Ciencia Y Tecnologõ Âa

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Comparison of palmolein and olive oil: effects on plasma lipids and vitamin E in young adults

Cited by 120 publications

References 55 publications

Monounsaturated oils do not all have the same effect on plasma cholesterol

Monounsaturated oils do not all have the same effect on plasma cholesterol

Effect of ingestion of virgin olive oil on human low-density lipoprotein composition

Lipoprotein profiles and serum peroxide levels of aged women consuming palmolein or oleic acid-rich sunflower oil diets

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