{"id":49940,"date":"2005-10-01T00:00:00","date_gmt":"2018-12-04T04:06:17","guid":{"rendered":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/spinach-or-carrots-can-supply-significant-amounts-of-vitamin\/"},"modified":"2018-12-04T05:06:17","modified_gmt":"2018-12-04T04:06:17","slug":"spinach-or-carrots-can-supply-significant-amounts-of-vitamin","status":"publish","type":"resume","link":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/spinach-or-carrots-can-supply-significant-amounts-of-vitamin\/","title":{"rendered":"Spinach or carrots can supply significant amounts of vitamin A as assessed by feeding with intrinsically deuterated vegetables."},"content":{"rendered":"<p style=\"text-align: justify\"><strong>BACKGROUND:<\/strong> The vitamin A value of spinach and carrots needs to be measured directly.<\/p>\n<p style=\"text-align: justify\"><strong>OBJECTIVE:<\/strong> The objective was to determine the vitamin A value of intrinsically labeled dietary spinach and carrots in humans.<\/p>\n<p style=\"text-align: justify\"><strong>DESIGN: <\/strong>Spinach and carrots were intrinsically labeled by growing these plants in 25 atom% 2H<sub>2<\/sub>O nutrient solution. Growth in this medium yielded a range of trans beta-carotene (tbeta-carotene) isotopomers with a peak enrichment at molecular mass plus 10 mass units. Seven men with a mean (+\/-SD) age of 59.0 +\/- 6.3 y and a body mass index (in kg\/m&sup2;) of 25.7 +\/- 1.5 consumed pureed spinach (300 g, 20.8 &micro;mol tbeta-carotene equivalents) or carrots (100 g, 19.2 &micro;mol tbeta-carotene equivalents) with a standardized liquid diet (no extra fiber) in random order 4 mo apart. Seven women with a mean (+\/-SD) age of 55.5 +\/- 6.3 y and a body mass index of 26.4 +\/- 4.2 consumed pureed spinach only (300 g, 20.0 &micro;mol tbeta-carotene equivalents). A reference dose of [13C8]retinyl acetate (8.9 &micro;mol) in oil was given to each subject 1 wk after each vegetable dose. Blood samples were collected over 35 d.<\/p>\n<p style=\"text-align: justify\"><strong>RESULTS: <\/strong>Areas under the curve for total labeled serum beta-carotene responses were 42.4 +\/- 8.5 nmol.d per micromol spinach beta-carotene and 119.8 +\/- 23.0 nmol.d per micromol carrot beta-carotene (P &lt; 0.01). Compared with the [13C8]retinyl acetate reference dose, spinach tbeta-carotene conversion to retinol was 20.9 +\/- 9.0 to 1 (range: 10.0-46.5 to 1) and carrot tbeta-carotene conversion to retinol was 14.8 +\/- 6.5 to 1 (range: 7.7-24.5 to 1) by weight.<\/p>\n<p style=\"text-align: justify\"><strong>CONCLUSIONS: <\/strong>Spinach and carrots can provide a significant amount of vitamin A even though the amount is not as great as previously proposed. Food matrices greatly affect the bioavailability of plant carotenoids, their efficiency of conversion to vitamin A, or both.<\/p>\n","protected":false},"template":"","mots_cles":[],"class_list":["post-49940","resume","type-resume","status-publish","hentry"],"acf":{"adresse":"Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, MA, 02111, USA. guangwen.tang@tufts.edu","annee":"2005","mois":"10","numero":"82:4","page":"821-828","auteurs":[{"ID":44929,"post_author":"0","post_date":"2018-12-04 03:34:10","post_date_gmt":"2018-12-04 02:34:10","post_content":"","post_title":"Russell","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"russell-2","to_ping":"","pinged":"","post_modified":"2018-12-04 03:34:10","post_modified_gmt":"2018-12-04 02:34:10","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/russell-2\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":49939,"post_author":"0","post_date":"2018-12-04 05:06:14","post_date_gmt":"2018-12-04 04:06:14","post_content":"","post_title":"Qin","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"qin-2","to_ping":"","pinged":"","post_modified":"2018-12-04 05:06:14","post_modified_gmt":"2018-12-04 04:06:14","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/qin-2\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":23520,"post_author":"0","post_date":"2018-12-03 21:28:39","post_date_gmt":"2018-12-03 20:28:39","post_content":"","post_title":"Michael A Grusak","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"michael-a-grusak","to_ping":"","pinged":"","post_modified":"2018-12-03 21:28:39","post_modified_gmt":"2018-12-03 20:28:39","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/michael-a-grusak\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":15800,"post_author":"0","post_date":"2018-12-03 19:31:04","post_date_gmt":"2018-12-03 18:31:04","post_content":"","post_title":"Gemma Tatangelo","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"gemma-tatangelo","to_ping":"","pinged":"","post_modified":"2018-12-03 19:31:04","post_modified_gmt":"2018-12-03 18:31:04","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/gemma-tatangelo\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"},{"ID":46603,"post_author":"0","post_date":"2018-12-04 04:03:06","post_date_gmt":"2018-12-04 03:03:06","post_content":"","post_title":"Dolnikowski","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"dolnikowski","to_ping":"","pinged":"","post_modified":"2018-12-04 04:03:06","post_modified_gmt":"2018-12-04 03:03:06","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/auteur\/dolnikowski\/","menu_order":0,"post_type":"auteur_resume","post_mime_type":"","comment_count":"0","filter":"raw"}],"sources":[{"ID":44192,"post_author":"0","post_date":"2018-12-04 03:19:18","post_date_gmt":"2018-12-04 02:19:18","post_content":"","post_title":"AMERICAN JOURNAL OF CLINICAL NUTRITION","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"american-journal-of-clinical-nutrition","to_ping":"","pinged":"","post_modified":"2018-12-04 03:19:18","post_modified_gmt":"2018-12-04 02:19:18","post_content_filtered":"","post_parent":0,"guid":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/source\/american-journal-of-clinical-nutrition\/","menu_order":0,"post_type":"source","post_mime_type":"","comment_count":"0","filter":"raw"}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.6 (Yoast SEO v23.6) - 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