South African Hydrogenated Oil Labeling.

The new regulations from the South African Department of Health have specified that fats and oils including partially hydrogenated shall be specified in the field of ingredients as “vegetable”, “animal”, “fish” or “marine” and list the ingoing type of fat and oils in parenthesis after the class name. In the case of vegetable fats and oils the particular part of the plant from which the fat or is derived shall be specified and such fats and oils shall be qualified by the term hydrogenated

So what does this mean to the consumer who is challenged with deciphering what partially hydrogenated is and how it affects the product that the consumer is ingesting, for example the partially hydrogenated listed in peanut butter?

According to the new SA food guidelines the labeling is incorrect as it does not specify where the source of the comes from and it does not specify what other ingredient is included to substantiate partially hydrogenated content. Consumers are dealing with a synthetic trans fat ingredient that is not exactly good for their health.

Synthetic trans fats were created to solve a problem since our ancient ancestors figured out that fried stuff tastes good: vegetable is a pain to work with. If it is put on a shelf it tends to go rancid, if it is put in food it leaves an unpleasant oily feel in your mouth. If the same is, however; treated with hydrogen, the problem disappears as partially hydrogenated vegetable , the end product of that process, will sit on the shelf for a long time, and it is extremely palatable. As industrial-scale food processing grew in scale, trans fats featured more and more in all kinds of things you are supposed to put in your mouth. It looked the ideal solution was solved. Except there was a minor side effect, trans fats kill. In the right quantities (which isn’t very much at all), artificial trans fats are like little chemical machines designed to induce strokes and heart attacks. While normal bad fats will merely raise your level of bad cholesterol, the kind that clogs arteries, man-made trans fats simultaneously lower good cholesterol too.
A second sife effct of the hydorgenation process is that metals are included.The hydrogenation process requires three components: heat, a metal catalyst and the pressurized hydrogen gas. Reactive metal atoms, such as copper or zinc, are introduced to the hydrogen gas as the gas is forced into the . The gas and metal are heated, and the heat helps them bond. The metal atoms also bond to the carbon atoms, allowing the hydrogen atoms to insert themselves between the carbon atoms that make up unsaturated fat molecules. The bonds between the carbon atoms become saturated with hydrogen atoms, turning what was once an unsaturated fat into a saturated fat.

A 2008 study to determine the levels of inorganic metals in hydoregnated vegetable oils determined that these oils contained trace amounts of lead, copper, magnesium, zinc, cadmium, nickel and cadmium.
Lead is a naturally occurring element and is a common industrial metal that has become widespread in air, water, soil, and food. Lead contamination varies and manifests itself in other ways than in green plants. Lead has severe health effects even at relatively low levels in the body and can cross the placenta and damage developing fetal nervous systems (Yu et al., 2001). are
essential for plant growth and human at low doses but may also be toxic for humans,
animals and plants at high doses. Copper and zinc are required in our diet because they exhibit a wide range of biological functions such as components of enzymatic and redox systems (McLaughlinet al., 1999). Environmental pollution due to copper arises from industrial and agricultural emissions. It is found in soil and water as a by-product from metal finishing in the processing industry and agricultural sources such as fertilizers and fungicidies (Namasivayam, & Senthilkumar, 1999).
Chromium is a naturally occurring element found in rocks, plants, soil, and in volcanic dust and gases.
Human are exposed when eating food, drinking water, and inhaling air that may contain chromium.
Excessive amounts of Cr may be involved in the pathogenesis of some diseases such as lung and gastrointestinal cancers (Donais et al., 1999; Kubrakova et al., 1994; Vique et al., 1997).
Cadmium is known as a principal toxic element, since it inhibits many life processes (Vetter, 1993;
Vetter, 1994; Singh et al., 1998). It can be taken up directly from water, and to some extent from air and via food, and it has a tendency to accumulate in both plants and animals.

None of the trace elements of inorganic metals would be mentioned in the label of the hydrogenated product that consumers use. Consumers have the choice of choosing healthier products that do contain partially hydrogenated if they choose to with the proper labeling.


E. PEHLIVAN, G.ARSLAN, F. GODE, T. ALTUN AND M. MUSA ÖZCAN. 2008.Determination of some inorganic metals in edible vegetable oils by inductively coupled plasma atomic emission spectroscopy (ICP-AES). GRASAS Y ACEITES, 59 (3), JULIO-SEPTIEMBRE, 239-244,
Allen LB, Siitonen PH, Thompson HC Jr. 1998. Determination of copper, lead, and nickel in edible oils by plasma and furnace atomic absorption spectroscopies. J. Am Chem. Soc. 75, 477–481.
Buldini PL, Ferri D, Sharma JL. 1997. Determination of some inorganic species in edible vegetable oils and fats by ion chromatography. J. Chromatogr. A, 789, 549–555.
Carlosena A, Andrade JM, Tomas X, Fernandez E, Prada, D.1999. Classification of edible vegetables affected by different traffic intensities using potential curves. Talanta 48, 795-802.
Choudhary M, Bailey LD, Grant CA, Leisle D. 1995. Effect of Zn on the concentration of Cd and Zn in plant tissue of two durum wheat lines. Can. J. Plant Sci. 75, 445- 448.
Cindric I J, Michaela Z, Steffan I. 2007. Trace elemental characterization of edible oils by ICP–AES andGFAAS. Microchem. J. 85, 136–139.
Coco FL, Ceccon L, Ciraolo L, Novelli V. 2003. Determination of cadmium (II) and zinc (II) in olive oils by derivative potentiometric stripping analysis. Food Control 14, 55–59.
Crosby NT. 1977. Determination of metals in food: a review. The Analyst 102, 225-268.
Dantas TNC, Neto AAD, Moura MCPA., Neto ELB, Forte KR, Leite RHL. 2003. Heavy metals extraction by microemulsions.Water Research 37, 2709-2717.
Demirbas A. 2001. Concentrations of 21 metals in 18 species of mushrooms growing in the East Black Sea region. Food Chem. 75, 453–457.
Donais, KM, Henry R, Rettberg T. 1999. Chromium speciation using an automated liquid handling systems with inductively coupled plasma-massspectrometric detection. Talanta 49, 1045-1050.
Dugo G, la Pera L, La Torre GL, Giuffrida D. 2004. Determination of Cd (II), Cu (II), Pb (II), and Zn (II) content in commercial vegetable oils using derivative  potentiometric stripping analysis. Food Chem. 87, 639-645.
European Community, rule n.466/2001. European Official Gazette, 16 th March 2001.
Farhan FM, Rammati H, Ghazi-Moghaddam G. 1988. Variation of race metal content of edible oils and fats during refining processes. J. Am Chem. Soc. 65, 1961-1962.
Garrido DM, Frias I, Diaz C, Hardisson A. 1994. Concentrations of metals in vegetable edible .Food Chem. 50, 237-243.
Hendrikse PW, Slikkerveer FJ, Folkersma A, Dieffenbacher A. 1991. Determi-nation of copper, iron and nickel in oils and fats by direct graphite furnace atomic absorption spectrometry. Pure Appl. Chem. 63, 1183–1190.
Heyes RB. 1997. The carcinogenicity of metals in humans. Cancer Causes and Control 8, 371-385. Kubrakova I, Kudinova T, Formanovsky A, Kuz,min N,
Tsysin G, Zolotov Y. 1994. Determination of chromium (III) and chromium (VI) in river water by electrothermal atomic absorption spectrometry after sorption preconcentration in a microwave field. The Analyst 119, 2477-2480.
Karadjova I, Zachariadis G, Boskou G, Stratis. J. 1998. Electrothermal atomic adsorption spectrometric determination of aluminium, cadmium, chromium, copper, iron, manganas, nickel and lead in olive . J. Anal. Atom. Spect.13, 201-204.
Leonardis DA, Macciola V, Felice DM. 2000. Copper and iron determination in edible vegetable oils by graphite furnace atomic absorption spectrometry after extraction with diluted nitric acid. Int. J. Food Sci. Technol. 35, 371-375.
La Pera L, Lo Coco F, Mavrogeni E, Giuffrida D, Dugo G.2002a. Determination of copper (II), lead (II), cadmium (II) and zinc (II) in virgin olive oils produced in Sicily and apulia by derivative potentiometric stripping analysis. Italian J. Food Sci. 14, 389-399.
La Pera L, Lo Curto S, Visco A, La Torre L, Dugo G. 2002b. Derivative potentiometric stripping analyses (dPSA) used for determination of cadmium, copper, lead and zinc in Sicilian olive oils. J. Agr. Food Chem. 50, 3090-3094.
Lo Coco F, Ceccon, L, Ciraolo L, Novelli V. (2003). Determination of cadmium (II) and zinc (II) in olive oils by derivative potentiometric stripping analysis. Food Control 14, 55-59.
Martin-Polvillo, M., Albi, T., Guinda, A. 1994. Determination of trace elements in edible vegetables oils by atomic absorption spectrophotometry. J. Am Chem. Soc. 71, 347-351.
McLaughlin MJ, Parker DR, Clarke JM. 1999. Metals and micronutrients-food safety issues. Field Crop Research 60, 143-163.
Nash AM, Mounts TL, Kwolek WF. 1983. Determination of ultratrace metals in hydrogenated vegetable oils and fats. J. Am Chem. Soc. 60, 811-814.
Namasivayam C, Senthilkumar S. 1999. Adsorption of copper (II) by “Waste” Fe(III/Cr(III) hydroxide from aqueous solution and radiator manufacturing industry wastewater. Sep. Sci. Technol. 34, 201-217.
Püskülcü H, kiz F. 1989. Introduction to Statistic. Bilgehan Press, p333, Bornova-‹zmir, Turkey. (in Turkish) Singh B D, Rupainwar C D, Prasad G, Jayaprakas C K.1998. Studies on the Cd(II) removal from water by adsorption. J. Hazard. Materials 60, 29-40.
Vique CC, Teissedre PL, Cabanis MT, Cabanis JC. 1997. Determination and levels of chromium in French wine an grapes by graphite furnace atomic absorption spectrometry. J. Agric. Food Chem. 45, 1808-1811.
Vetter J. 1993. Toxic elements in certain higher fungi.Food Chem. 48, 207–208.
Vetter J. (1994). Data on arsenic and cadmium contents of some common mushrooms. Toxicon 32, 11–15.
Yu B, Zhang Y, Shukla A, Ukla SS, Dorris LK. 2001. The removal of heavy metals from aqueous solution by sawdust adsorption-removal of lead and comparison of its adsorption with copper. J. Hazard. Materials 84, 83-94.
Zeiner, M., Steffan, I., Cindric, I., J. (2005). Determination of trace elements in olive by ICP-AES and ETA-AAS: A pilot study on the geographical characterization. Microchem. J. 81, 171–176.

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