Vitamin A equivalency and apparent absorption of β-carotene in ileostomy subjects using a dual-isotope dilution technique
The objective was to quantify the vitamin A equivalency of β-carotene in two diets using a dual-isotope dilution technique and the apparent β-carotene absorption as measured by the oral–faecal balance technique. Seventeen healthy adults with an ileostomy completed the 4-week diet-controlled, cross-o...
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| Published in | British journal of nutrition Vol. 103; no. 12; pp. 1836 - 1843 |
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| Main Authors | , , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Cambridge, UK
Cambridge University Press
28.06.2010
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| Subjects | |
| Online Access | Get full text |
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| Abstract | The objective was to quantify the vitamin A equivalency of β-carotene in two diets using a dual-isotope dilution technique and the apparent β-carotene absorption as measured by the oral–faecal balance technique. Seventeen healthy adults with an ileostomy completed the 4-week diet-controlled, cross-over intervention study. Each subject followed both diets for 2 weeks: a diet containing vegetables low in β-carotene content with supplemental β-carotene in salad dressing oil (‘oil diet’; mean β-carotene intake 3·1 mg/d) and a diet containing vegetables and fruits high in β-carotene content (‘mixed diet’; mean β-carotene intake 7·6 mg/d). Daily each subject consumed a mean of 190 μg [13C10]β-carotene and 195 μg [13C10]retinyl palmitate in oil capsules. The vitamin A equivalency of β-carotene was calculated as the dose-corrected ratio of [13C5]retinol to [13C10]retinol in serum. Apparent absorption of β-carotene was determined with oral–faecal balance. Isotopic data quantified a vitamin A equivalency of [13C10]β-carotene in oil of 3·6:1 (95 % CI 2·8, 4·6) regardless of dietary matrices differences. The apparent absorption of (labelled and dietary) β-carotene from the ‘oil diet’ (30 %) was 1·9-fold higher than from the ‘mixed diet’ (16 %). This extrinsic labelling technique can measure precisely the vitamin A equivalency of β-carotene in oil capsules, but it does not represent the effect of different dietary matrices. |
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| AbstractList | The objective was to quantify the vitamin A equivalency of beta-carotene in two diets using a dual-isotope dilution technique and the apparent beta-carotene absorption as measured by the oral-faecal balance technique. Seventeen healthy adults with an ileostomy completed the 4-week diet-controlled, cross-over intervention study. Each subject followed both diets for 2 weeks: a diet containing vegetables low in beta-carotene content with supplemental beta-carotene in salad dressing oil ('oil diet'; mean beta-carotene intake 3.1 mg/d) and a diet containing vegetables and fruits high in beta-carotene content ('mixed diet'; mean beta-carotene intake 7.6 mg/d). Daily each subject consumed a mean of 190 microg [13C10]beta-carotene and 195 microg [13C10]retinyl palmitate in oil capsules. The vitamin A equivalency of beta-carotene was calculated as the dose-corrected ratio of [13C5]retinol to [13C10]retinol in serum. Apparent absorption of beta-carotene was determined with oral-faecal balance. Isotopic data quantified a vitamin A equivalency of [13C10]beta-carotene in oil of 3.6:1 (95 % CI 2.8, 4.6) regardless of dietary matrices differences. The apparent absorption of (labelled and dietary) beta-carotene from the 'oil diet' (30 %) was 1.9-fold higher than from the 'mixed diet' (16 %). This extrinsic labelling technique can measure precisely the vitamin A equivalency of beta-carotene in oil capsules, but it does not represent the effect of different dietary matrices. The objective was to quantify the vitamin A equivalency of β-carotene in two diets using a dual-isotope dilution technique and the apparent β-carotene absorption as measured by the oral–faecal balance technique. Seventeen healthy adults with an ileostomy completed the 4-week diet-controlled, cross-over intervention study. Each subject followed both diets for 2 weeks: a diet containing vegetables low in β-carotene content with supplemental β-carotene in salad dressing oil (‘oil diet’; mean β-carotene intake 3·1 mg/d) and a diet containing vegetables and fruits high in β-carotene content (‘mixed diet’; mean β-carotene intake 7·6 mg/d). Daily each subject consumed a mean of 190 μg [13C10]β-carotene and 195 μg [13C10]retinyl palmitate in oil capsules. The vitamin A equivalency of β-carotene was calculated as the dose-corrected ratio of [13C5]retinol to [13C10]retinol in serum. Apparent absorption of β-carotene was determined with oral–faecal balance. Isotopic data quantified a vitamin A equivalency of [13C10]β-carotene in oil of 3·6:1 (95 % CI 2·8, 4·6) regardless of dietary matrices differences. The apparent absorption of (labelled and dietary) β-carotene from the ‘oil diet’ (30 %) was 1·9-fold higher than from the ‘mixed diet’ (16 %). This extrinsic labelling technique can measure precisely the vitamin A equivalency of β-carotene in oil capsules, but it does not represent the effect of different dietary matrices. The objective was to quantify the vitamin A equivalency of β-carotene in two diets using a dual-isotope dilution technique and the apparent β-carotene absorption as measured by the oral–faecal balance technique. Seventeen healthy adults with an ileostomy completed the 4-week diet-controlled, cross-over intervention study. Each subject followed both diets for 2 weeks: a diet containing vegetables low in β-carotene content with supplemental β-carotene in salad dressing oil (‘oil diet’; mean β-carotene intake 3·1 mg/d) and a diet containing vegetables and fruits high in β-carotene content (‘mixed diet’; mean β-carotene intake 7·6 mg/d). Daily each subject consumed a mean of 190 μg [ 13 C 10 ]β-carotene and 195 μg [ 13 C 10 ]retinyl palmitate in oil capsules. The vitamin A equivalency of β-carotene was calculated as the dose-corrected ratio of [ 13 C 5 ]retinol to [ 13 C 10 ]retinol in serum. Apparent absorption of β-carotene was determined with oral–faecal balance. Isotopic data quantified a vitamin A equivalency of [ 13 C 10 ]β-carotene in oil of 3·6:1 (95 % CI 2·8, 4·6) regardless of dietary matrices differences. The apparent absorption of (labelled and dietary) β-carotene from the ‘oil diet’ (30 %) was 1·9-fold higher than from the ‘mixed diet’ (16 %). This extrinsic labelling technique can measure precisely the vitamin A equivalency of β-carotene in oil capsules, but it does not represent the effect of different dietary matrices. The objective was to quantify the vitamin A equivalency of beta-carotene in two diets using a dual-isotope dilution technique and the apparent beta-carotene absorption as measured by the oral-faecal balance technique. Seventeen healthy adults with an ileostomy completed the 4-week diet-controlled, cross-over intervention study. Each subject followed both diets for 2 weeks: a diet containing vegetables low in beta-carotene content with supplemental beta-carotene in salad dressing oil ('oil diet'; mean beta-carotene intake 3.1 mg/d) and a diet containing vegetables and fruits high in beta-carotene content ('mixed diet'; mean beta-carotene intake 7.6 mg/d). Daily each subject consumed a mean of 190 microg [13C10]beta-carotene and 195 microg [13C10]retinyl palmitate in oil capsules. The vitamin A equivalency of beta-carotene was calculated as the dose-corrected ratio of [13C5]retinol to [13C10]retinol in serum. Apparent absorption of beta-carotene was determined with oral-faecal balance. Isotopic data quantified a vitamin A equivalency of [13C10]beta-carotene in oil of 3.6:1 (95 % CI 2.8, 4.6) regardless of dietary matrices differences. The apparent absorption of (labelled and dietary) beta-carotene from the 'oil diet' (30 %) was 1.9-fold higher than from the 'mixed diet' (16 %). This extrinsic labelling technique can measure precisely the vitamin A equivalency of beta-carotene in oil capsules, but it does not represent the effect of different dietary matrices.The objective was to quantify the vitamin A equivalency of beta-carotene in two diets using a dual-isotope dilution technique and the apparent beta-carotene absorption as measured by the oral-faecal balance technique. Seventeen healthy adults with an ileostomy completed the 4-week diet-controlled, cross-over intervention study. Each subject followed both diets for 2 weeks: a diet containing vegetables low in beta-carotene content with supplemental beta-carotene in salad dressing oil ('oil diet'; mean beta-carotene intake 3.1 mg/d) and a diet containing vegetables and fruits high in beta-carotene content ('mixed diet'; mean beta-carotene intake 7.6 mg/d). Daily each subject consumed a mean of 190 microg [13C10]beta-carotene and 195 microg [13C10]retinyl palmitate in oil capsules. The vitamin A equivalency of beta-carotene was calculated as the dose-corrected ratio of [13C5]retinol to [13C10]retinol in serum. Apparent absorption of beta-carotene was determined with oral-faecal balance. Isotopic data quantified a vitamin A equivalency of [13C10]beta-carotene in oil of 3.6:1 (95 % CI 2.8, 4.6) regardless of dietary matrices differences. The apparent absorption of (labelled and dietary) beta-carotene from the 'oil diet' (30 %) was 1.9-fold higher than from the 'mixed diet' (16 %). This extrinsic labelling technique can measure precisely the vitamin A equivalency of beta-carotene in oil capsules, but it does not represent the effect of different dietary matrices. The objective was to quantify the vitamin A equivalency of β-carotene in two diets using a dual-isotope dilution technique and the apparent β-carotene absorption as measured by the oral–faecal balance technique. Seventeen healthy adults with an ileostomy completed the 4-week diet-controlled, cross-over intervention study. Each subject followed both diets for 2 weeks: a diet containing vegetables low in β-carotene content with supplemental β-carotene in salad dressing oil (‘oil diet’; mean β-carotene intake 3·1 mg/d) and a diet containing vegetables and fruits high in β-carotene content (‘mixed diet’; mean β-carotene intake 7·6 mg/d). Daily each subject consumed a mean of 190 μg [13C10]β-carotene and 195 μg [13C10]retinyl palmitate in oil capsules. The vitamin A equivalency of β-carotene was calculated as the dose-corrected ratio of [13C5]retinol to [13C10]retinol in serum. Apparent absorption of β-carotene was determined with oral–faecal balance. Isotopic data quantified a vitamin A equivalency of [13C10]β-carotene in oil of 3·6:1 (95 % CI 2·8, 4·6) regardless of dietary matrices differences. The apparent absorption of (labelled and dietary) β-carotene from the ‘oil diet’ (30 %) was 1·9-fold higher than from the ‘mixed diet’ (16 %). This extrinsic labelling technique can measure precisely the vitamin A equivalency of β-carotene in oil capsules, but it does not represent the effect of different dietary matrices. |
| Author | Naber, Ton H. J. Siebelink, Els Schaafsma, Gertjan Russel, Frans G. M. Van Loo-Bouwman, Carolien A. van Breemen, Richard B. Zhu, Dongwei West, Clive E. Dicke, Heleen Hulshof, Paul J. M. |
| Author_xml | – sequence: 1 givenname: Carolien A. surname: Van Loo-Bouwman fullname: Van Loo-Bouwman, Carolien A. email: Carolien.VanLooBouwman@hotmail.com organization: Department of Gastroenterology and Hepatology, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands – sequence: 2 givenname: Ton H. J. surname: Naber fullname: Naber, Ton H. J. organization: Department of Gastroenterology and Hepatology, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands – sequence: 3 givenname: Richard B. surname: van Breemen fullname: van Breemen, Richard B. organization: Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois, 833 S. Wood Street, Chicago, IL 60612-7231, USA – sequence: 4 givenname: Dongwei surname: Zhu fullname: Zhu, Dongwei organization: Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois, 833 S. Wood Street, Chicago, IL 60612-7231, USA – sequence: 5 givenname: Heleen surname: Dicke fullname: Dicke, Heleen organization: Division of Dietetics, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands – sequence: 6 givenname: Els surname: Siebelink fullname: Siebelink, Els organization: Division of Human Nutrition, Wageningen University, PO Box 8129, 6700 EV Wageningen, The Netherlands – sequence: 7 givenname: Paul J. M. surname: Hulshof fullname: Hulshof, Paul J. M. organization: Division of Human Nutrition, Wageningen University, PO Box 8129, 6700 EV Wageningen, The Netherlands – sequence: 8 givenname: Frans G. M. surname: Russel fullname: Russel, Frans G. M. organization: Department of Pharmacology and Toxicology, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands – sequence: 9 givenname: Gertjan surname: Schaafsma fullname: Schaafsma, Gertjan organization: Division of Human Nutrition, Wageningen University, PO Box 8129, 6700 EV Wageningen, The Netherlands – sequence: 10 givenname: Clive E. surname: West fullname: West, Clive E. organization: Department of Gastroenterology and Hepatology, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands |
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| Keywords | Ileostomy subjects Vitamin A equivalency Stable isotopes β-Carotene Human Ileostomy Carotene Vitamin Isotope dilution Retinol Vertebrata Absorption Mammalia Technique Isotopes |
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| References_xml | – volume: 132 start-page: 159 year: 2002 ident: S0007114509993849_ref9 publication-title: J Nutr doi: 10.1093/jn/132.2.159 – ident: S0007114509993849_ref16 doi: 10.1016/S0021-9673(97)01138-2 – ident: S0007114509993849_ref15 doi: 10.1351/pac199971122245 – volume-title: Guidelines for a Healthy Diet year: 2006 ident: S0007114509993849_ref14 – ident: S0007114509993849_ref18 doi: 10.1021/ac000454e – volume: 93 start-page: 585 year: 1997 ident: S0007114509993849_ref22 publication-title: Clin Sci doi: 10.1042/cs0930585 – ident: S0007114509993849_ref11 doi: 10.1017/S0007114508131762 – volume: 82 start-page: 821 year: 2005 ident: S0007114509993849_ref21 publication-title: Am J Clin Nutr doi: 10.1093/ajcn/82.4.821 – volume-title: Results of the Food Consumption Measurement 1997–1998 year: 1998 ident: S0007114509993849_ref25 – volume-title: Dutch Food Database 2001 year: 2001 ident: S0007114509993849_ref13 – volume: 77 start-page: 12 year: 2003 ident: S0007114509993849_ref4 publication-title: Am J Clin Nutr doi: 10.1093/ajcn/77.1.12 – ident: S0007114509993849_ref8 doi: 10.1046/j.1440-6047.11.s.7.1.x – ident: S0007114509993849_ref17 doi: 10.1002/rcm.2601 – ident: S0007114509993849_ref6 doi: 10.1079/BJN20031030 – ident: S0007114509993849_ref24 doi: 10.1007/s00394-003-0430-6 – volume-title: Vitamin and Mineral Requirements in Human Nutrition year: 2004 ident: S0007114509993849_ref2 – ident: S0007114509993849_ref5 doi: 10.1016/j.abb.2004.04.028 – ident: S0007114509993849_ref23 doi: 10.1007/s00394-004-0434-x – ident: S0007114509993849_ref20 doi: 10.1194/jlr.M400504-JLR200 – volume: 78 start-page: 259 year: 2003 ident: S0007114509993849_ref7 publication-title: Am J Clin Nutr doi: 10.1093/ajcn/78.2.259 – volume-title: Requirements of Vitamin A, Iron, Folate and Vitamin B year: 1988 ident: S0007114509993849_ref1 – volume: 73 start-page: 949 year: 2001 ident: S0007114509993849_ref10 publication-title: Am J Clin Nutr doi: 10.1093/ajcn/73.5.949 – volume-title: Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc year: 2001 ident: S0007114509993849_ref3 – volume: 58 start-page: 489 year: 1993 ident: S0007114509993849_ref12 publication-title: Am J Clin Nutr doi: 10.1093/ajcn/58.4.489 |
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| Snippet | The objective was to quantify the vitamin A equivalency of β-carotene in two diets using a dual-isotope dilution technique and the apparent β-carotene... The objective was to quantify the vitamin A equivalency of beta-carotene in two diets using a dual-isotope dilution technique and the apparent beta-carotene... |
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| SubjectTerms | Adult beta Carotene - administration & dosage beta Carotene - metabolism beta Carotene - pharmacokinetics beta-carotene Biological and medical sciences Capsules Cross-Over Studies Diet Dietary Fats - administration & dosage dietary supplements digestive system diseases dual-isotope dilution technique experimental diets Feces - chemistry Feeding. Feeding behavior Female Fundamental and applied biological sciences. Psychology Humans Ileostomy Ileostomy subjects ileum Indicator Dilution Techniques Innovative Techniques Intestinal Absorption Isotopes Male Middle Aged nutrient balance nutritional adequacy nutritional intervention patients Stable isotopes Vertebrates: anatomy and physiology, studies on body, several organs or systems vitamin A Vitamin A - analogs & derivatives Vitamin A - analysis Vitamin A - blood Vitamin A equivalency β-Carotene |
| Title | Vitamin A equivalency and apparent absorption of β-carotene in ileostomy subjects using a dual-isotope dilution technique |
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