Fatty Acid Contents and Stability of Oyster Nut Oil (Telfairia pedata) Compared to Flaxseed and Sunflower Oil

Abstract

The selection of healthy fats for consumption is important. Linoleic acid (LA) (omega-6) and alpha-linolenic acid (ALA) (omega-3) are essential polyunsaturated fatty acids required for the maintenance of good health; however, LA derivatives such as arachidonic acid (AA) are associated with the onset of inflammatory diseases, and both are prone to oxidation and deterioration. This study compared the fatty acid contents, peroxide value (PV), p-anisidine value (p-AV), and free fatty acids (FFA) of the oyster nut oil with refined sunflower, nonrefined sunflower, and flaxseed oil stored at 27°C for 40 days. Flaxseed oil had significantly high ALA content (59.8%) compared to 0.1-0.5% for oyster nut and sunflower oil brands. The LA content was high in sunflower brands (50.3-52.8%) compared to the oyster nut (48%) and flaxseed oil 14.7%. Oleic acid was lower in oyster nut oil (8.6%) and flaxseed oil 15.8% compared to sunflower brands (35.7-38.2%). As a consequence, oyster nut and flaxseed recorded higher PV of 4.35-2.88 mEq O2/kg and FFA 0.26-0.47% compared to sunflower brands. The p-AV recorded small values which were not significantly different in all samples. Although oyster nut is widely consumed by pregnant and lactating women across Africa, its keeping quality in nonrefined form is low compared to flaxseed and sunflower oil as shown in this study. Hence, the fatty acid contents in oyster nuts should be consumed in other alternative forms such as flour and roasted kernels rather than its oil when in nonrefined form. This study will enable the consumption balance of omega-6/omega-3 fatty acids and the keeping quality of oils which is key to health.

Proximate Composition, Physicochemical, and Lipids Profiling and Elemental Profiling of Rapeseed (Brassica napus L.) and Sunflower (Helianthus annuus L.) Grown in Morocco

“…Linolenic acid, a highly oxidizable molecule [ 41 , 70 ], is also present in very low concentration in sunflower oil (usually less than 0.3%) ( Table 4 ). The results obtained in sunflower oil were in agreement with those found by Mwakasege et al (2021) [ 88 ]. This small content of linolenic acid can be used to detect the adulteration of sunflower oil with other vegetable oils rich in linolenic acids, such as rapeseed (up to of 14%).…”

“…e results obtained in sunflower oil were in agreement with those found by Mwakasege et al (2021) [88].…”

Nutrients, phenolics, fatty acids and mineral composition of <i>Telfairia</i> <i>pedata</i> (SIMS) hook seed kernels obtained from Kilimanjaro, Tanzania

“…The double bond reacts readily with oxygen (singlet) forming oxidative byproducts like free radicals, hydroperoxides, and aldehydes which have detrimental health effects. Due to this observation, a study by Mwakasege et al, (2021b), recommends eating T. pedata seed kernels raw, or cooked under low heat, thus, maintaining their composition and goodness.…”

Effect of Sunflower Oil Supplementation on Milk Production, Composition, Fatty Acid Profile and Blood Metabolites of Mehsana Buffaloes

“…Earlier studies have reported benefits of sunflower oil supplementation in lactating animals include increased energy concentration in the diet, reduced supply of rapidly fermentable carbohydrates and better Effect of Sunflower Oil Supplementation on Milk Production, Composition, Fatty Acid Profile and Blood Metabolites of Mehsana.. productive performance (Morsy et al, 2015;Khalifa et al, 2016). Moreover, sunflower oil contains 64.1 and 25.2 percent of linoleic acid (cis-9, cis-12 C18:2) and oleic acid (cis-9 C18:1), respectively (Mwakasege et al, 2021).…”