{"id":13584,"date":"2022-05-11T09:49:56","date_gmt":"2022-05-11T08:49:56","guid":{"rendered":"https:\/\/www.lactalisingredients.com\/?post_type=blog-post&#038;p=13584"},"modified":"2022-05-12T10:18:23","modified_gmt":"2022-05-12T09:18:23","slug":"le-lactose-principal-constituant-du-lait","status":"publish","type":"blog-post","link":"https:\/\/www.lactalisingredients.com\/fr\/news\/blog\/le-lactose-principal-constituant-du-lait\/","title":{"rendered":"Le lactose : le sucre id\u00e9al ?"},"content":{"rendered":"<h2><span style=\"text-decoration: underline;\"><strong>Le lactose : le principal constituant du lait<\/strong><\/span><\/h2>\n<p>&nbsp;<\/p>\n<p>D\u2019apr\u00e8s une enqu\u00eate d\u2019Euromonitor en 2020, les consommateurs qui se concentraient auparavant sur la teneur en mati\u00e8re grasse se focalisent de plus en plus sur le sucre. Le sucre est aujourd\u2019hui per\u00e7u par les consommateurs comme incompatible avec la sant\u00e9 et le bien-\u00eatre<sup>7<\/sup>, alors m\u00eame que les sucres repr\u00e9sentent une grande famille de mol\u00e9cules diverses.<\/p>\n<p>Sur l\u2019\u00e9tiquetage alimentaire, les sucres correspondent aux monosaccharides et disaccharides, par exemple le saccharose, le fructose, ou encore le lactose, le sucre naturel du lait. C\u2019est un disaccharide compos\u00e9 d\u2019une mol\u00e9cule de glucose li\u00e9e \u00e0 une mol\u00e9cule de galactose. Pour \u00eatre dig\u00e9r\u00e9 par l\u2019organisme, le lactose est hydrolys\u00e9 (d\u00e9coup\u00e9) au niveau de l\u2019intestin gr\u00eale en glucose et en galactose gr\u00e2ce \u00e0 une enzyme intestinale appel\u00e9e la lactase.<\/p>\n<p>Apr\u00e8s l\u2019eau, le lactose est le composant le plus important du lait liquide <sup>5<\/sup>. On le retrouve \u00e0 des concentrations variables dans le lait de tous les mammif\u00e8res, par exemple, le lait maternel contient 7% de lactose <sup>3<\/sup> tant dis que le lait bovin en contient 4,8%<sup>5<\/sup>. Ce qui montre qu\u2019il s\u2019agit ainsi d\u2019un nutriment important pour les mammif\u00e8res d\u00e8s leur naissance !<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>Apr\u00e8s l\u2019eau, le lactose est le composant le plus important du lait liquide.<\/p><\/blockquote>\n<p>Le <a href=\"https:\/\/www.lactalisingredients.com\/fr\/produits-ingredients-laitiers\/poudres-de-lactoserum-et-lactose\/poudres-de-lactose\/\">lactose<\/a> dispose de nombreux atouts qui sont malheureusement m\u00e9connus du grand public, comme son faible pouvoir cariog\u00e8ne, son effet pr\u00e9biotique et son faible index glyc\u00e9mique. <sup>9<\/sup><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2><span style=\"text-decoration: underline;\">Qu\u2019est-ce que l\u2019index glyc\u00e9mique ?<\/span><\/h2>\n<p>&nbsp;<\/p>\n<p>L\u2019index\/indice glyc\u00e9mique est une valeur qui permet de comparer la capacit\u00e9 des glucides \u00e0 augmenter la teneur en glucose dans le sang, c\u2019est-\u00e0-dire la glyc\u00e9mie. En fonction du type de glucide ing\u00e9r\u00e9 (simples ou complexes ou autrement dit \u00e0 chaines courtes ou \u00e0 chaines longues, ramifi\u00e9 ou non, complexit\u00e9 de la structure mol\u00e9culaire\u2026), la teneur en glucose dans le sang va augmenter plus ou moins vite. On d\u00e9termine la glyc\u00e9mie en effectuant une mesure du taux de glucose sanguin dans les 2h apr\u00e8s l\u2019ingestion d\u2019une portion contenant 50 g de glucides de l\u2019aliment test\u00e9. <sup>1<\/sup><\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>L\u2019index\/indice glyc\u00e9mique est une valeur qui permet de comparer la capacit\u00e9 des glucides \u00e0 augmenter la teneur en glucose dans le sang.<\/p><\/blockquote>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-13586 size-full\" src=\"https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2022-LACTOSE-FR.png\" alt=\"\" width=\"560\" height=\"315\" srcset=\"https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2022-LACTOSE-FR.png 560w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2022-LACTOSE-FR-300x169.png 300w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2022-LACTOSE-FR-24x14.png 24w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2022-LACTOSE-FR-36x20.png 36w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2022-LACTOSE-FR-48x27.png 48w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/p>\n<p style=\"text-align: center;\">Figure 1 : Utilisation de l&#8217;aire sous courbe pour la d\u00e9finition de l&#8217;index glyc\u00e9mique<\/p>\n<p>&nbsp;<\/p>\n<p>L\u2019aire sous la courbe r\u00e9sultante repr\u00e9sente l\u2019index glyc\u00e9mique (figure 1). Il s\u2019exprime par rapport \u00e0 une r\u00e9f\u00e9rence ayant un index glyc\u00e9mique de 100, qui est l\u2019index glyc\u00e9mique du glucose. <sup>1<\/sup><\/p>\n<p><sup>\u00a0<\/sup><\/p>\n<p>Les aliments ont ainsi \u00e9t\u00e9 class\u00e9s en trois cat\u00e9gories\u00a0<sup>2, 6\u00a0<\/sup>:<\/p>\n<ul class=\"ul\" style=\"list-style-type: disc;\">\n<li>Index glyc\u00e9mique faible\u00a0:\u00a0\u00a0\u00a0\u00a0\u00a0 IG \u2264 55<\/li>\n<li>Index glyc\u00e9mique moyen\u00a0: \u00a0\u00a0 55 &lt; IG \u2264 70<\/li>\n<li>Index glyc\u00e9mique \u00e9lev\u00e9\u00a0: \u00a0\u00a0\u00a0\u00a0 70 &lt; IG<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h2><span style=\"text-decoration: underline;\">Le lactose : un sucre \u00e0 index glyc\u00e9mique bas !<\/span><\/h2>\n<p>&nbsp;<\/p>\n<p>Une \u00e9tude in vivo r\u00e9cente <sup>4 <\/sup>(figure 2), a montr\u00e9 qu\u2019\u00e0 charge de glucose ou de lactose \u00e9gale, la glyc\u00e9mie est significativement plus faible chez les sujets ayant consomm\u00e9 du lactose par rapport au glucose. Le lactose produit un pic glyc\u00e9mique plus faible que le glucose, ce qui pourrait entra\u00eener une r\u00e9ponse insulinique plus faible, c\u2019est-\u00e0-dire que l\u2019organisme a moins besoin de produire l\u2019insuline, l\u2019hormone r\u00e9gulatrice de la glyc\u00e9mie.<\/p>\n<p>&nbsp;<\/p>\n<blockquote><p>Le lactose produit un pic glyc\u00e9mique plus faible que le glucose, ce qui pourrait entra\u00eener une r\u00e9ponse insulinique plus faible.<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-13569 size-full\" src=\"https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-14.png\" alt=\"\" width=\"560\" height=\"315\" srcset=\"https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-14.png 560w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-14-300x169.png 300w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-14-24x14.png 24w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-14-36x20.png 36w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-14-48x27.png 48w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/p>\n<p style=\"text-align: center;\">Figure 2: Evolution de la glyc\u00e9mie selon le sucre consomm\u00e9\u00a0: Lactose ou glucose<\/p>\n<p>&nbsp;<\/p>\n<p>Comme mentionn\u00e9 ci-dessus, pendant la digestion, le lactose est hydrolys\u00e9 au niveau de l\u2019intestin gr\u00eale par la lactase en deux monosaccharides\u00a0: le glucose et le galactose. Le galactose est ensuite converti au niveau du foie en glucose. <strong>Cette \u00e9tape suppl\u00e9mentaire de transformation du galactose en glucose, ralentirait la lib\u00e9ration du glucose dans le sang et la rendrait plus progressive, ce qui contribue \u00e0 expliquer l\u2019index glyc\u00e9mique bas du lactose.<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><u>Tableau non exhaustif de l\u2019index glyc\u00e9mique des sucres<\/u> <sup>8<\/sup><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-13588 size-full\" src=\"https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-Lactose-tableau-FR.png\" alt=\"\" width=\"560\" height=\"315\" srcset=\"https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-Lactose-tableau-FR.png 560w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-Lactose-tableau-FR-300x169.png 300w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-Lactose-tableau-FR-24x14.png 24w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-Lactose-tableau-FR-36x20.png 36w, https:\/\/www.lactalisingredients.com\/wp-content\/uploads\/2022\/05\/Visuels-blog-2021-Lactose-tableau-FR-48x27.png 48w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/p>\n<p>&nbsp;<\/p>\n<p>Le tableau ci-dessus liste les index glyc\u00e9miques des sucres les plus connus\u00a0: le lactose a un index glyc\u00e9mique de 46 <sup>8<\/sup>, il s\u2019agit donc d\u2019un index glyc\u00e9mique faible.<\/p>\n<p>Int\u00e9gr\u00e9 \u00e0 un r\u00e9gime alimentaire \u00e9quilibr\u00e9 et vari\u00e9, le lactose peut contribuer \u00e0 diminuer l\u2019index glyc\u00e9mique d\u2019un aliment et potentiellement lib\u00e9rer progressivement son \u00e9nergie sans produire un pic glyc\u00e9mique.<\/p>\n<p><strong>\u00a0<\/strong>Toutes ces caract\u00e9ristiques, encore aujourd\u2019hui m\u00e9connues, pourraient contribuer \u00e0 faire du lactose un sucre diff\u00e9rent des autres sucres.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 8pt;\">Sources:<br \/>\n<\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[1] R. Ancellin, C. Saul, C. Thomann, et M. Coipel.\u00a0Glucides et sant\u00e9: Etat des lieux, \u00e9valuation et recommandations, 2004, 167.<br \/>\n<\/span><span style=\"font-size: 8pt;\"><a href=\"https:\/\/www.anses.fr\/fr\/system\/files\/NUT-Ra-Glucides.pdf\">https:\/\/www.anses.fr\/fr\/system\/files\/NUT-Ra-Glucides.pdf<\/a><\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[2] L.S.A. Augustin, C. W. C. Kendall, D. J. A. Jenkins, W. C. Willett, A. Astrup, A. W. Barclay, I. Bj\u00f6rck, et al. Glycemic Index, Glycemic Load and Glycemic Response: An International Scientific Consensus Summit from the International Carbohydrate Quality Consortium (ICQC). <em>Nutrition, Metabolism, and Cardiovascular Diseases: NMCD<\/em> 25, No. 9 (September 2015): 795\u2011815.<br \/>\n<\/span><span style=\"font-size: 8pt;\"><a href=\"https:\/\/doi.org\/10.1016\/j.numecd.2015.05.005\">https:\/\/doi.org\/10.1016\/j.numecd.2015.05.005<\/a>.<\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[3] O. Ballard, A. Morrow. Human Milk Composition: Nutrients and Bioactive Factors\u00a0. <em>Pediatric Clinics of North America<\/em> 60, No.1, 2013, Pages 49\u201174<br \/>\n<\/span><span style=\"font-size: 8pt;\"><a href=\"https:\/\/doi.org\/10.1016\/j.pcl.2012.10.002\">https:\/\/doi.org\/10.1016\/j.pcl.2012.10.002<\/a><\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[4] B.\u00a0Choque, A.\u00a0Ligneul. \u00c9valuation d&#8217;un index glyc\u00e9mique-like du\u00a0lactose\u00a0chez un mod\u00e8le murin. JFN 2020. P059.<\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[5] Ciqual: Table de composition nutritionnelle des aliments.<br \/>\n<\/span><span style=\"font-size: 8pt;\"><a href=\"https:\/\/ciqual.anses.fr\/#\/aliments\/19024\/lait-entier-pasteurise\">https:\/\/ciqual.anses.fr\/#\/aliments\/19024\/lait-entier-pasteurise<\/a>.<\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[6] ISO\u00a026642:2010(fr), Produits alimentaires\u00a0\u2014 D\u00e9termination de l\u2019index glyc\u00e9mique (IG) et recommandations relatives \u00e0 la classification des aliments. <a href=\"https:\/\/www.iso.org\/obp\/ui\/#iso:std:iso:26642:ed-1:v1:fr\">https:\/\/www.iso.org\/obp\/ui\/#iso:std:iso:26642:ed-1:v1:fr<\/a>.<\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[7] M. Mascaraque. Sugar and Sweeteners: Consumer Priorities Triggering Change. 2021.<br \/>\n<\/span><span style=\"font-size: 8pt;\"><a href=\"https:\/\/www.euromonitor.com\/article\/sugar-and-sweeteners-consumer-priorities-triggering-change\">https:\/\/www.euromonitor.com\/article\/sugar-and-sweeteners-consumer-priorities-triggering-change<\/a><\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[8] K.Foster-Powell, Susanna HA Holt, Janette C Brand-Miller, International table of glycemic <\/span><span style=\"font-size: 8pt;\">index and glycemic load values: 2002, The American Journal of Clinical Nutrition, Volume 76, <\/span><span style=\"font-size: 8pt;\">Issue 1, July 2002, Pages 5\u201356, <a href=\"https:\/\/doi.org\/10.1093\/ajcn\/76.1.5\">https:\/\/doi.org\/10.1093\/ajcn\/76.1.5<\/a><\/span><\/p>\n<p><span style=\"font-size: 8pt;\">[9] E. Romero-Velarde, Enrique, D. Delgado-Franco, M. Garc\u00eda-Guti\u00e9rrez, C. Gurrola-D\u00edaz, A.Larrosa-Haro, E. Montijo-Barrios, F. A. J. Muskiet, B. Vargas-Guerrero, et Jan Geurts. The Importance of Lactose in the Human Diet: Outcomes of a Mexican Consensus Meeting. <em>Nutrients<\/em> 11, No. 11, 2019: Page 2737 <a href=\"https:\/\/doi.org\/10.3390\/nu11112737\">https:\/\/doi.org\/10.3390\/nu11112737<\/a><\/span><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le lactose : le principal constituant du lait &nbsp; D\u2019apr\u00e8s [&hellip;]<\/p>\n","protected":false},"featured_media":13556,"template":"","class_list":["post-13584","blog-post","type-blog-post","status-publish","has-post-thumbnail","hentry","blog-category-expertise-fr","blog-category-sante-et-nutrition"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Le lactose : le sucre id\u00e9al ? - Lactalis Ingredients<\/title>\n<meta name=\"description\" content=\"Apr\u00e8s l\u2019eau, le lactose est le principal constituant du lait. 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