Intake of Palm Olein and Lipid Status in Healthy Adults: A Meta-Analysis

Abstract

It is not clear whether a saturated fatty acid–rich palm olein diet has any significant adverse effect on established surrogate lipid markers of cardiovascular disease (CVD) risk. We reviewed the effect of palm olein with other oils on serum lipid in healthy adults. We searched in MEDLINE and CENTRAL: Central Register of Controlled Trials from 1975 to January 2018 for randomized controlled trials of ≥2 wk intervention that compared the effects of palm olein (the liquid fraction of palm oil) with other oils such as coconut oil, lard, canola oil, high-oleic sunflower oil, olive oil, peanut oil, and soybean oil on changes in serum lipids. Nine studies were eligible and were included, with a total of 533 and 542 subjects on palm olein and other dietary oil diets, respectively. We extracted and compared all the data for serum lipids, such as total cholesterol (TC), LDL cholesterol, HDL cholesterol, triglyceride, and TC/HDL cholesterol ratio. When comparing palm olein with other dietary oils, the overall weighted mean differences for TC, LDL cholesterol, HDL cholesterol, triglycerides, and the TC/HDL cholesterol ratio were −0.10 (95% CI: −0.30, 0.10; P = 0.34), −0.06 (95% CI: −0.29,0.16; P = 0.59), 0.02 (95% CI: −0.01, 0.04; P = 0.20), 0.01 (95% CI: −0.05, 0.06; P = 0.85), and −0.15 (95% CI: −0.43, 0.14; P = 0.32), respectively. Overall, there are no significant differences in the effects of palm olein intake on lipoprotein biomarkers (P > 0.05) compared with other dietary oils. However, dietary palm olein was found to have effects comparable to those of other unsaturated dietary oils (monounsaturated fatty acid– and polyunsaturated fatty acid–rich oils) but differed from that of saturated fatty acid–rich oils with respect to the serum lipid profile in healthy adults.

Balancing functional and health benefits of food products formulated with palm oil as oil sources

“…Olive (Almoselhy et al., 2019) and sesame ( Shi et al., 2017 ; Toorani et al., 2019 ) oils are primarily composed of 1-oleoyl-2-oleoyl-3-oleoyl-sn-glycerol, which is thought to be healthier (OOO). CPO is composed primarily of 44–45% palmitic acid, 39–40% oleic acid, and 10–11% linoleic acid ( Voon et al., 2019 ). The sn-1 and sn-3 locations are occupied by palmitic and stearic acids, respectively, whereas the sn-2 position is occupied by oleic and linoleic acids ( Marangoni et al., 2017 ).…”

“…PO has the largest amount of γ-tocotrienol, which has the strongest antioxidant potential, when compared to other vegetable oils ( Ganesan et al., 2018 ). There are previous studies investigated the effects of PO on human health ( Voon et al., 2019 ; Dong et al., 2017 ), but this article will focus on the role of PO in pathologies by looking at cardioprotective, antidiabetic, anti-inflammatory, and antithrombotic effects in both human ( Table 4 ) and animal ( Table 5 ) studies.…”

Investigation of bias due to selective inclusion of study effect estimates in meta-analyses of nutrition research

“…Initially, all SRs with a continuous outcome were included, and 25 of the 74 SRs with a non-continuous outcome were randomly selected. However, from these 50 SRs, eight were excluded (6 continuous, 2 non-continuous), because the index meta-analysis had 20 or more studies, leaving 42 included SRs 22-41 42-46 47-51 52,53 [54][55][56][57][58][59][60][61][62][63] . After extracting data from the included studies of these 42 SRs, we excluded a further three SRs because we were unable to identify the relevant outcome data in any of the included primary study reports 61 , or none of the included studies had multiplicity of effect estimates 62 63 .…”

The tribological performance analysis of palm olein-based grease lubricants containing copper nanoparticle additive

“…18 Palm olein, which has a higher total oleic acid content than palm oil, offers further benefits for lubrication applications. 19 Oleic acid is widely used as a friction-modifying additive in lubricating oils. It enhances the adsorption ability on the metal surface and improves lubrication properties, making it a highly valuable ingredient in lubricant formulations.…”