<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title>UTas ePrints - Effect of monounsaturated fat in the diet on the serum carotenoid levels</title> <script type="text/javascript" src="http://eprints.utas.edu.au/javascript/auto.js"><!-- padder --></script> <style type="text/css" media="screen">@import url(http://eprints.utas.edu.au/style/auto.css);</style> <style type="text/css" media="print">@import url(http://eprints.utas.edu.au/style/print.css);</style> <link rel="icon" href="/images/eprints/favicon.ico" type="image/x-icon" /> <link rel="shortcut icon" href="/images/eprints/favicon.ico" type="image/x-icon" /> <link rel="Top" href="http://eprints.utas.edu.au/" /> <link rel="Search" href="http://eprints.utas.edu.au/cgi/search" /> <meta content="Ahuja, K.D." name="eprints.creators_name" /> <meta content="kiran.ahuja@utas.edu.au" name="eprints.creators_id" /> <meta content="thesis" name="eprints.type" /> <meta content="2007-04-12" name="eprints.datestamp" /> <meta content="2008-01-08 15:30:00" name="eprints.lastmod" /> <meta content="show" name="eprints.metadata_visibility" /> <meta content="Effect of monounsaturated fat in the diet on the serum carotenoid levels" name="eprints.title" /> <meta content="unpub" name="eprints.ispublished" /> <meta content="320000" name="eprints.subjects" /> <meta content="321205" name="eprints.subjects" /> <meta content="public" name="eprints.full_text_status" /> <meta content="lycopene, carotenoids, coronary heart disease, antioxidants, monounsaturated fat rich diet, high carbohydrate low fat diet, tomatoes" name="eprints.keywords" /> <meta content="Epidemiological data suggest that populations with higher serum/ tissue levels of carotenoids have a lower risk of coronary heart disease (CHD), possibly due to the antioxidant capacity. Lycopene, a carotenoid mainly found in tomatoes, has been suggested to have the greatest antioxidant capacity of the carotenoids found in fruits and vegetables. Carotenoids are fat-soluble compounds and their absorption from the diet into the body may depend on the amount of dietary fat ingested. For years there has been debate about what energy source should replace the saturated fat in the diet, to give the optimum serum lipid profile to reduce CHD risk. Studies have compared monounsaturated fat rich diets with high carbohydrate, low fat diets and have found that both diets decrease serum cholesterol and low-density lipoprotein (LDL) cholesterol levels. Results for high-density lipoprotein (HDL) cholesterol and triglycerides have been inconsistent. However, it is of interest to study the effects of different diets on lipid oxidation, as this may also influence CHD risk. Studies have investigated the effect of different amounts of total fat on the serum levels of carotenoids especially beta-carotene and lutein, but to our knowledge no study has looked at the effect of different amounts of fats on the serum lycopene levels, and whether this could subsequently affect the oxidation of LDL in vitro. XIV Two separate randomised crossover dietary intervention studies were conducted; one in healthy men and the other in healthy women aged 20 to 70 years. The aim was to compare the effects of monounsaturated fat rich (MUFA) diet (38% of energy from fat) and high carbohydrate low fat (HCLF) diet (15% energy from fat) with controlled lycopene content, on serum lycopene levels. Main sources of lycopene in the diets were canned tomatoes and tomato soup for the study in women (lycopene content -15.9 mg/day) and tomato paste and tomato soup for the study in men (lycopene content - 20.2 mg/day). Serum lipids and lipoproteins levels and in vitro oxidation of LDL particles were also measured. Compared to the baseline levels there was a significant increase in the serum trans lycopene and total lycopene levels after MUFA diet for the study in women. Comparing the levels at the end of the two diets no difference was observed. In the study in men serum trans, cis and total lycopene levels increased after the MUFA and HCLF diet periods. There was no significant difference in trans; cis and total lycopene levels at the end of two diets. Thus, high levels of monounsaturated fat in the diet do not appear to increase lycopene absorption and serum levels compared to very low fat diet. There was however a better serum lipid profile after MUFA diet compared to HCLF diet. Lag phase for the in vitro oxidation of LDL particles was also longer on the MUFA diet. The lack of difference in antioxidant levels would indicate that this was due to the different fatty acid component of the diet." name="eprints.abstract" /> <meta content="2001" name="eprints.date" /> <meta content="published" name="eprints.date_type" /> <meta content="163" name="eprints.pages" /> <meta content="University of Tasmania" name="eprints.institution" /> <meta content="School of Human Life Sciences" name="eprints.department" /> <meta content="rmaster" name="eprints.thesis_type" /> <meta content="(1995). Fats and oils: The facts. Meadowlea Foods, Australia. Abbey, M., Belling, G. B., Noakes, M., Hirata, F., and Nestel, P. J. (1993a). Oxidation of low-density lipoproteins: intraindividual variability and the effect of dietary linoleate supplementation. Am J Clin Nutr 57, 391-8. Abbey, M., Nestel, P. J., and Baghurst, P. A. (1993b). Antioxidant vitamins and low-density-lipoprotein oxidation. Am J Clin Nutr 58, 525-32. Agarwal, S., and Rao, A. V. (1998). 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Vitamin E supplementation and cardiovascular events in high-risk patients. The Heart Outcomes Prevention Evaluation Study Investigators. N Engl J Med 342, 154-60." name="eprints.referencetext" /> <meta content="Ahuja, K.D. (2001) Effect of monounsaturated fat in the diet on the serum carotenoid levels. Research Master thesis, University of Tasmania." name="eprints.citation" /> <meta content="http://eprints.utas.edu.au/737/1/Front-Matter.pdf" name="eprints.document_url" /> <meta content="http://eprints.utas.edu.au/737/2/Whole-Thesis.pdf" name="eprints.document_url" /> <link rel="schema.DC" href="http://purl.org/DC/elements/1.0/" /> <meta content="Effect of monounsaturated fat in the diet on the serum carotenoid levels" name="DC.title" /> <meta content="Ahuja, K.D." name="DC.creator" /> <meta content="320000 Medical and Health Sciences" name="DC.subject" /> <meta content="321205 Nutrition and Dietetics" name="DC.subject" /> <meta content="Epidemiological data suggest that populations with higher serum/ tissue levels of carotenoids have a lower risk of coronary heart disease (CHD), possibly due to the antioxidant capacity. Lycopene, a carotenoid mainly found in tomatoes, has been suggested to have the greatest antioxidant capacity of the carotenoids found in fruits and vegetables. Carotenoids are fat-soluble compounds and their absorption from the diet into the body may depend on the amount of dietary fat ingested. For years there has been debate about what energy source should replace the saturated fat in the diet, to give the optimum serum lipid profile to reduce CHD risk. Studies have compared monounsaturated fat rich diets with high carbohydrate, low fat diets and have found that both diets decrease serum cholesterol and low-density lipoprotein (LDL) cholesterol levels. Results for high-density lipoprotein (HDL) cholesterol and triglycerides have been inconsistent. However, it is of interest to study the effects of different diets on lipid oxidation, as this may also influence CHD risk. Studies have investigated the effect of different amounts of total fat on the serum levels of carotenoids especially beta-carotene and lutein, but to our knowledge no study has looked at the effect of different amounts of fats on the serum lycopene levels, and whether this could subsequently affect the oxidation of LDL in vitro. XIV Two separate randomised crossover dietary intervention studies were conducted; one in healthy men and the other in healthy women aged 20 to 70 years. The aim was to compare the effects of monounsaturated fat rich (MUFA) diet (38% of energy from fat) and high carbohydrate low fat (HCLF) diet (15% energy from fat) with controlled lycopene content, on serum lycopene levels. Main sources of lycopene in the diets were canned tomatoes and tomato soup for the study in women (lycopene content -15.9 mg/day) and tomato paste and tomato soup for the study in men (lycopene content - 20.2 mg/day). Serum lipids and lipoproteins levels and in vitro oxidation of LDL particles were also measured. Compared to the baseline levels there was a significant increase in the serum trans lycopene and total lycopene levels after MUFA diet for the study in women. Comparing the levels at the end of the two diets no difference was observed. In the study in men serum trans, cis and total lycopene levels increased after the MUFA and HCLF diet periods. There was no significant difference in trans; cis and total lycopene levels at the end of two diets. Thus, high levels of monounsaturated fat in the diet do not appear to increase lycopene absorption and serum levels compared to very low fat diet. There was however a better serum lipid profile after MUFA diet compared to HCLF diet. Lag phase for the in vitro oxidation of LDL particles was also longer on the MUFA diet. The lack of difference in antioxidant levels would indicate that this was due to the different fatty acid component of the diet." name="DC.description" /> <meta content="2001" name="DC.date" /> <meta content="Thesis" name="DC.type" /> <meta content="NonPeerReviewed" name="DC.type" /> <meta content="application/pdf" name="DC.format" /> <meta content="http://eprints.utas.edu.au/737/1/Front-Matter.pdf" name="DC.identifier" /> <meta content="application/pdf" name="DC.format" /> <meta content="http://eprints.utas.edu.au/737/2/Whole-Thesis.pdf" name="DC.identifier" /> <meta content="Ahuja, K.D. (2001) Effect of monounsaturated fat in the diet on the serum carotenoid levels. 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border: solid 1px #ccc; padding: 3px"><tr> <td align="left"><a href="http://eprints.utas.edu.au/cgi/users/home">Login</a> | <a href="http://eprints.utas.edu.au/cgi/register">Create Account</a></td> <td align="right" style="white-space: nowrap"> <form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/search" style="display:inline"> <input class="ep_tm_searchbarbox" size="20" type="text" name="q" /> <input class="ep_tm_searchbarbutton" value="Search" type="submit" name="_action_search" /> <input type="hidden" name="_order" value="bytitle" /> <input type="hidden" name="basic_srchtype" value="ALL" /> <input type="hidden" name="_satisfyall" value="ALL" /> </form> </td> </tr></table></td></tr> <tr> <td class="toplinks"><!-- InstanceBeginEditable name="content" --> <div align="center"> <table width="720" class="ep_tm_main"><tr><td align="left"> <h1 class="ep_tm_pagetitle">Effect of monounsaturated fat in the diet on the serum carotenoid levels</h1> <p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Ahuja, K.D.</span> (2001) <xhtml:em>Effect of monounsaturated fat in the diet on the serum carotenoid levels.</xhtml:em> Research Master thesis, University of Tasmania.</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a onmouseover="EPJS_ShowPreview( event, 'doc_preview_746' );" href="http://eprints.utas.edu.au/737/1/Front-Matter.pdf" onmouseout="EPJS_HidePreview( event, 'doc_preview_746' );"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" class="ep_doc_icon" border="0" /></a><div class="ep_preview" id="doc_preview_746"><table><tr><td><img alt="" src="http://eprints.utas.edu.au/737/thumbnails/1/preview.png" class="ep_preview_image" border="0" /><div class="ep_preview_title">Preview</div></td></tr></table></div></td><td valign="top"><a 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class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Epidemiological data suggest that populations with higher serum/ tissue levels of carotenoids have a lower risk of coronary heart disease (CHD), possibly due to the antioxidant capacity. Lycopene, a carotenoid mainly found in tomatoes, has been suggested to have the greatest antioxidant capacity of the carotenoids found in fruits and vegetables. Carotenoids are fat-soluble compounds and their absorption from the diet into the body may depend on the amount of dietary fat ingested. For years there has been debate about what energy source should replace the saturated fat in the diet, to give the optimum serum lipid profile to reduce CHD risk. Studies have compared monounsaturated fat rich diets with high carbohydrate, low fat diets and have found that both diets decrease serum cholesterol and low-density lipoprotein (LDL) cholesterol levels. Results for high-density lipoprotein (HDL) cholesterol and triglycerides have been inconsistent. However, it is of interest to study the effects of different diets on lipid oxidation, as this may also influence CHD risk. Studies have investigated the effect of different amounts of total fat on the serum levels of carotenoids especially beta-carotene and lutein, but to our knowledge no study has looked at the effect of different amounts of fats on the serum lycopene levels, and whether this could subsequently affect the oxidation of LDL in vitro. XIV Two separate randomised crossover dietary intervention studies were conducted; one in healthy men and the other in healthy women aged 20 to 70 years. The aim was to compare the effects of monounsaturated fat rich (MUFA) diet (38% of energy from fat) and high carbohydrate low fat (HCLF) diet (15% energy from fat) with controlled lycopene content, on serum lycopene levels. Main sources of lycopene in the diets were canned tomatoes and tomato soup for the study in women (lycopene content -15.9 mg/day) and tomato paste and tomato soup for the study in men (lycopene content - 20.2 mg/day). Serum lipids and lipoproteins levels and in vitro oxidation of LDL particles were also measured. Compared to the baseline levels there was a significant increase in the serum trans lycopene and total lycopene levels after MUFA diet for the study in women. Comparing the levels at the end of the two diets no difference was observed. In the study in men serum trans, cis and total lycopene levels increased after the MUFA and HCLF diet periods. There was no significant difference in trans; cis and total lycopene levels at the end of two diets. Thus, high levels of monounsaturated fat in the diet do not appear to increase lycopene absorption and serum levels compared to very low fat diet. There was however a better serum lipid profile after MUFA diet compared to HCLF diet. Lag phase for the in vitro oxidation of LDL particles was also longer on the MUFA diet. The lack of difference in antioxidant levels would indicate that this was due to the different fatty acid component of the diet.</p></div><table style="margin-bottom: 1em" cellpadding="3" class="not_ep_block" border="0"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Thesis (Research Master)</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">lycopene, carotenoids, coronary heart disease, antioxidants, monounsaturated fat rich diet, high carbohydrate low fat diet, tomatoes</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/320000.html">320000 Medical and Health Sciences</a><br /><a href="http://eprints.utas.edu.au/view/subjects/321205.html">320000 Medical and Health Sciences > 321200 Public Health and Health Services > 321205 Nutrition and Dietetics</a></td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">737</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Cherie Holmes</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">12 Apr 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">09 Jan 2008 02:30</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=737;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=737">item control page</a></p> </td></tr></table> </div> <!-- InstanceEndEditable --></td> </tr> <tr> <td><!-- #BeginLibraryItem "/Library/footer_eprints.lbi" --> <table width="795" border="0" align="left" cellpadding="0" class="footer"> <tr valign="top"> <td colspan="2"><div align="center"><a href="http://www.utas.edu.au">UTAS home</a> | <a href="http://www.utas.edu.au/library/">Library home</a> | <a href="/">ePrints home</a> | <a href="/contact.html">contact</a> | <a href="/information.html">about</a> | <a href="/view/">browse</a> | <a href="/perl/search/simple">search</a> | <a href="/perl/register">register</a> | <a href="/perl/users/home">user area</a> | <a href="/help/">help</a></div><br /></td> </tr> <tr><td colspan="2"><p><img src="/images/eprints/footerline.gif" width="100%" height="4" /></p></td></tr> <tr valign="top"> <td width="68%" class="footer">Authorised by the University Librarian<br /> © University of Tasmania ABN 30 764 374 782<br /> <a href="http://www.utas.edu.au/cricos/">CRICOS Provider Code 00586B</a> | <a href="http://www.utas.edu.au/copyright/copyright_disclaimers.html">Copyright & Disclaimers</a> | <a href="http://www.utas.edu.au/accessibility/index.html">Accessibility</a> | <a href="http://eprints.utas.edu.au/feedback/">Site Feedback</a> </td> <td width="32%"><div align="right"> <p align="right" class="NoPrint"><a href="http://www.utas.edu.au/"><img src="http://www.utas.edu.au/shared/logos/unioftasstrip.gif" alt="University of Tasmania Home Page" width="260" height="16" border="0" align="right" /></a></p> <p align="right" class="NoPrint"><a href="http://www.utas.edu.au/"><br /> </a></p> </div></td> </tr> <tr valign="top"> <td><p> </p></td> <td><div align="right"><span class="NoPrint"><a href="http://www.eprints.org/software/"><img src="/images/eprintslogo.gif" alt="ePrints logo" width="77" height="29" border="0" align="bottom" /></a></span></div></td> </tr> </table> <!-- #EndLibraryItem --> <div align="center"></div></td> </tr> </table> </body> </html>