Study on the influence of palm oil on blood and liver biochemical parameters, beta-carotene and tocochromanols content as well as antioxidant activity in rats

Abstract

In the ongoing discussion on the health properties of palm oil, a study of the effect a diet supplemented with palm oil on blood and liver biochemical parameters, beta‐carotene and tocochromanols content as well as antioxidant activity was undertaken. Forty Wistar rats were randomly divided into five groups, fed with a diet supplemented with plant‐based frying commercial fat, palm oil, 7.5% palm oil and 2.5% concentrate from palm oil and 10% of rapeseed oil, respectively. After 21 days, blood samples and livers were collected to determine beta‐carotene and tocochromanols concentrations, antioxidant activity using DPPH* radical scavenging activity and TEAC methods, insulin, glucagon, serum triacyloglycerols and cholesterol levels, glucose in blood serum and glycogen in the livers. Research has shown valuable biological properties of palm oil in terms of plasma glucose, total cholesterol, low‐density lipoprotein (LDL) cholesterol, and triacylglycerol concentrations which was related to the high content of beta‐carotene and tocochromanols. Practical application Public concern over the health properties of palm oil has been growing. Therefore, this study supplements existing knowledge in this area based on experimental rat observations. In the presented research, plasma glucose was significantly reduced and no additional growth of total or LDL cholesterol, as well as triacylglycerol concentration, was observed after consuming a palm oil‐based diet. Palm oil was a good source of beta‐carotene and tocochromanols, which were preferentially distributed in rats’ livers. Bioavailability of vitamin E‐active compounds in palm oil supplemented rats’ livers was relatively high as compared to the rapeseed oil group, therefore this observation complements literature in the field of tocotrienols and tocopherols. Studies have not confirmed the harmful effect of palm oil on rats, however in depth human studies appear to be a promising direction for further research.

The effect of replacing red palm stearin with red palm olein in baked potato cookies

“…It was reported that the long-term intake of RPOL as a source of carotenoids, can improve regional population problems (Sobhana et al, 2019), improve the biological characteristics of animal plasma glucose, and cholesterol, and prevent diabetes and cardiovascular diseases. Red palm olein improve the levels of catalase and glutathione peroxidase in red blood cells, which is beneficial to antioxidation (Szulczewska-Remi et al, 2019). In addition, the combined effects of carotene, tocopherols, tocotrienols and other natural antioxidants in red palm olein cannot be underestimated (Yanishlieva et al, 1998).…”

Wybrane Aspekty Technologiczne I Zdrowotne Stosowania Oleju Palmowego W Produkcji Żywności

“…W badaniach przeprowadzonych przez Szulczewską-Remi i wsp. [39] u szczurów karmionych paszami zawierającymi 10 % składu komponentowego różnych olejów (olej roślinny PLANTA używany do smażenia, olej palmowy, mieszanina oleju palmowego i oleiny palmowej, olej rzepakowy oraz mieszanina oleju rzepakowego i oleju palmowego) stwierdzono, że stężenie glukozy w surowicy krwi było najwyższe w grupie karmionej paszą z dodatkiem oleju rzepakowego, natomiast najniższe w grupie karmionej paszą z dodatkiem oleju palmowego. Otrzymane wyniki autorzy tłumaczą dużą zawartością tokotrienoli w oleju palmowym, które wpływają na obniżenie stężenia glukozy w osoczu [47].…”

Effects of different edible oils on in vitro starch digestibility and physical properties of rice starch and rice flour

“…Edible oils such as coconut oil (CO), rice bran oil (RO), palm oil (PO), and soybean oil (SO) are generally used for food preparation in Thailand. Interestingly, these oils have previously been reported to provide various health benefits, e.g., lowering cholesterol, reducing the risk of coronary heart disease, and preventing free radicals (Liau et al ., 2011; Szulczewska‐Remi et al ., 2019; Sura et al ., 2020; Deen et al ., 2021; Messina et al ., 2021; Xu et al ., 2021).…”