{"id":49325,"date":"2006-02-01T00:00:00","date_gmt":"2018-12-04T03:54:59","guid":{"rendered":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/low-levels-of-carotenoids-and-retinol-in-involutional-osteoporosis\/"},"modified":"2018-12-04T04:54:59","modified_gmt":"2018-12-04T03:54:59","slug":"low-levels-of-carotenoids-and-retinol-in-involutional-osteoporosis","status":"publish","type":"resume","link":"https:\/\/aprifel-pp.mentalworks.biz\/fr\/resume-scientifique\/low-levels-of-carotenoids-and-retinol-in-involutional-osteoporosis\/","title":{"rendered":"Low levels of carotenoids and retinol in involutional osteoporosis."},"content":{"rendered":"<p>Previous epidemiological studies conducted in retinol-supplemented subjects showed an association between high serum levels or dietary intake of retinol and risk of hip fracture. On the other side, observational studies revealed that non-supplemented subjects with higher dietary intake of retinol lose less bone with age than subjects with lower intake. This discrepancy, currently unexplained, suggests that nutrition plays a major role in conditioning the effects of retinol on bone. Since retinol is derived from both retinoids &#8211; contained in animal food &#8211; and carotenoids &#8211; contained in vegetables and fruits &#8211; we evaluated a possible role of carotenoids in involutional osteoporosis. Therefore, plasma levels of beta-carotene and other carotenoids, in addition to those of retinol, were measured in free-living, non-supplemented, elderly women with or without severe osteoporosis. Plasma levels of retinol and of all carotenoids tested, with the exception of lutein, were consistently lower in osteoporotic than in control women. A weak association was found only between retinol and femoral neck bone mineral density in osteoporotic women. Our study suggests a bone sparing effect of retinol, to which the provitamin A activity of some carotenoids might have contributed.<\/p>\n","protected":false},"template":"","mots_cles":[],"class_list":["post-49325","resume","type-resume","status-publish","hentry"],"acf":{"adresse":"Institute of Gerontology and Geriatrics, University of Perugia, Policlinico Monteluce, Via Brunamonti, 06124 Perugia, Italy.","annee":"2006","mois":"2","numero":"38:2","page":"244-8","auteurs":[{"ID":49317,"post_author":"0","post_date":"2018-12-04 04:54:53","post_date_gmt":"2018-12-04 03:54:53","post_content":"","post_title":"Stahl","post_excerpt":"","post_status":"publish","comment_status":"closed","ping_status":"closed","post_password":"","post_name":"stahl-2","to_ping":"","pinged":"","post_modified":"2018-12-04 04:54:53","post_modified_gmt":"2018-12-04 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