{"id":13065,"date":"2023-04-19T09:59:54","date_gmt":"2023-04-19T09:59:54","guid":{"rendered":"https:\/\/foodpunk.com\/blog\/how-are-carbohydrates-structured\/"},"modified":"2025-10-06T14:37:57","modified_gmt":"2025-10-06T12:37:57","slug":"how-are-carbohydrates-structured","status":"publish","type":"post","link":"https:\/\/foodpunk.com\/en\/blog\/how-are-carbohydrates-structured\/","title":{"rendered":"How are carbohydrates structured?"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row row_bg_color=&#8221;bg&#8211;color&#8211;bg-blue&#8221; row_boxpadding=&#8221;vc_boxpadding&#8221;][vc_column][vc_column_text]Sure! Carbohydrates are pasta, rice, potatoes. Everybody knows it! But do you really know what a carbohydrate molecule looks like?[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column]<div class=\"vmb-3 wpb_content_element\" ><div class=\"index-list\"><p class=\"h4 index-list__title\"> Table of contents<\/p><ul><\/ul><\/div><\/div>[vc_column_text]Carbohydrates belong to the macronutrients. While micronutrients are only found in small amounts in our food, the 3 macronutrients &#8211; proteins, carbohydrates and fats &#8211; make up the majority of our diet and provide our bodies with energy. Depending on how we eat, macronutrients end up on our plates in varying amounts. For example, what happens in the body when virtually no carbohydrates are consumed, you can read in the article<a href=\"https:\/\/foodpunk.com\/de\/blog\/stoffwechsel-ohne-kohlenhydrate\/\" target=\"_blank\" rel=\"noopener\">&#8220;What happens in the metabolism without carbohydrates?<\/a>&#8220;.<\/p>\n<p>To help you understand why your metabolism behaves differently on different diets, it&#8217;s important to take a look at the basics. The better you know the &#8220;individual parts&#8221;, the easier it is for you to understand the &#8220;big picture&#8221;.<\/p>\n<p>Let&#8217;s take a completely non-judgmental look at carbohydrates. What do they look like?[\/vc_column_text]<div class=\"vmb-3 wpb_content_element\" ><div class=\"heading heading--h2 \"><h2 class=\"heading h3  \" >Carbohydrates come in <em><\/em>various sizes<em><\/em>.<\/h2><\/div><\/div>[vc_column_text]<\/p>\n<p>The smallest unit is a simple sugar. Here we are talking about a single carbohydrate molecule. When 2 carbohydrate molecules are joined, we speak of a double sugar. The different monosaccharides can be combined in a wide variety of ways, resulting in a wide variety of disaccharides. There is an even greater variety in the multiple sugars. For such a so-called polysaccharide, thousands of simple sugars can be linked in various combinations. Strands that are too long or networks that are too complex.<\/p>\n<p>[\/vc_column_text]<div class=\"templatera_shortcode\"><div class=\"vc_container vc_maxwidth \"><div class=\"vc_row wpb_row vc_row-fluid vc_row-o-content-bottom vc_row-flex bg--color--bg-secondary bg--image--pos-br bg--image--size--contain\"><div class=\"wpb_column vc_column_container vc_col-sm-7 vc_col-lg-7\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_row wpb_row vc_inner vc_row-fluid vpt-3 vpb-3\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vmb-1 wpb_content_element\" ><div class=\"heading heading--p \"><p class=\"heading h3  heading--center\" >Du m\u00f6chtest dich auch <span class=\"deco-underline\">ges\u00fcnder ern\u00e4hren<\/span>?<\/p><\/div><\/div><div class=\"wpb_content_element\" ><div class=\"btn__wrapper \"><a href=\"https:\/\/foodpunk.com\/de\/ernaehrungsplaene\/clean-eating\/?utm_source=website&utm_medium=banner\" target=\"\" rel=\"\" title=\"\" class=\"btn--full btn--primary btn--md \"><span>Jetzt durchstarten!<\/span><\/a><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"d-none d-md-flex wpb_column vc_column_container vc_col-sm-4 vc_col-lg-5\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div  class=\"wpb_single_image wpb_content_element vc_align_left vmb-3 wpb_content_element\" >\n\t\t\n\t\t<figure class=\"wpb_wrapper vc_figure\">\n\t\t\t<div class=\"vc_single_image-wrapper  \"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"865\" src=\"https:\/\/foodpunk.com\/wp-content\/uploads\/hero-manu2.png\" class=\"vc_single_image-img attachment-large\" alt=\"\" title=\"hero-manu2\" srcset=\"https:\/\/foodpunk.com\/wp-content\/uploads\/hero-manu2.png 900w, https:\/\/foodpunk.com\/wp-content\/uploads\/hero-manu2-300x288.png 300w, https:\/\/foodpunk.com\/wp-content\/uploads\/hero-manu2-768x738.png 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\"><\/div>\n\t\t<\/figure>\n\t<\/div>\n<\/div><\/div><\/div><\/div><\/div>\r\n<\/div><div class=\"vmt-3 vmb-3 wpb_content_element\" ><div class=\"heading heading--h2 \"><h2 class=\"heading h3  \" >1. monosaccharides - simple sugars<\/h2><\/div><\/div>[vc_column_text]Probably the best known monosaccharides are glucose, fructose and galactose. These three all have a backbone of 6 carbon atoms (C). Associated with this are hydrogen atoms (H), an oxygen atom (O) and so-called hydroxy groups (OH), consisting of an oxygen atom (O) and a hydrogen atom (H).<\/p>\n<p>Surely you have seen a sum formula before. This indicates which atoms and how many of them are hidden in a molecule. In our case, it indicates how many carbon, hydrogen, and oxygen atoms are in a molecule of said carbohydrates.<\/p>\n<ul>\n<li>Glucose <sub>C6H12O6<\/sub><\/li>\n<li>Fructose <sub>C6H12O6<\/sub><\/li>\n<li>Galactose <sub>C6H12O6<\/sub><\/li>\n<\/ul>\n<p>As you can see, for all the listed simple sugars, the molecular formula is exactly the same. They each consist of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms.<\/p>\n<p>We can only see the difference when we take a concrete look at the structure of these carbohydrates. There are several ways to display the structure. The so-called <a href=\"https:\/\/de.wikipedia.org\/wiki\/Fischer-Projektion\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Fischer projection<\/a> shows the molecule in the open-chain form:[\/vc_column_text][vc_single_image image=&#8221;7614&#8243; img_size=&#8221;large&#8221;][vc_column_text]<\/p>\n<p>As a rule, however, the simple sugars form a closed ring. This is best represented using the <a href=\"https:\/\/de.wikipedia.org\/wiki\/Haworth-Formel\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Harworth notation <\/a>. And this is how it looks:<\/p>\n<p>[\/vc_column_text][vc_single_image image=&#8221;7615&#8243; img_size=&#8221;large&#8221;][vc_column_text]<\/p>\n<p>A simple sugar can form a &#8220;<a href=\"https:\/\/de.wikipedia.org\/wiki\/Pyranosen\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">pyranose<\/a>&#8221; or &#8220;<a href=\"https:\/\/de.wikipedia.org\/wiki\/Furanosen\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">furanose<\/a>&#8221; ring. Pyranoses are rings consisting of 5 carbon atoms and one oxygen atom. Furanoses are rings consisting of 4 carbon atoms and one oxygen atom. The remaining carbon atoms are outside the ring. Shown are pyranose structures.<\/p>\n<p>[\/vc_column_text]<div class=\"vmb-3 wpb_content_element\" ><div class=\"heading heading--h2 \"><h2 class=\"heading h3  \" >2. disaccharides - twofold sugars<\/h2><\/div><\/div>[vc_column_text]<\/p>\n<p>The variety of dual sugars is enormous. For example, 2 glucose molecules can be combined in 11 different ways to form a disaccharide. Known disaccharides are maltose, sucrose and lactose.<\/p>\n<ul>\n<li>Maltose <sub>C12H22O11<\/sub><\/li>\n<li>Sucrose <sub>C12H22O11<\/sub><\/li>\n<li>Lactose <sub>C12H22O11<\/sub><\/li>\n<\/ul>\n<p>Here, too, the molecular formulae are identical at first, and it is not possible to identify the simple sugars from which the disaccharides are made up.<\/p>\n<ul>\n<li>Maltose = glucose + glucose<\/li>\n<li>Sucrose = Glucose + Fructose<\/li>\n<li>Lactose = Galactose + Glucose<\/li>\n<\/ul>\n<p>And this is how the structure of these 3 disaccharides looks like:<\/p>\n<p>[\/vc_column_text][vc_single_image image=&#8221;7616&#8243; img_size=&#8221;large&#8221;]<div class=\"vmb-3 wpb_content_element\" ><div class=\"heading heading--h2 \"><h2 class=\"heading h3  \" >3. polysaccharides - multiple sugars<\/h2><\/div><\/div>[vc_column_text]Surely you&#8217;ve heard of <strong>glycogen<\/strong> before. Starch and dietary fiber are also terms used almost every day. Glycogen is stored in the muscle and liver of humans and animals. It is, so to speak, the storage form of glucose. Many glucose molecules are linked and broken down as needed. Fungi also use glycogen for energy storage.<\/p>\n<p>By <strong>starch<\/strong>, we mean vegetable starch that humans can use for energy production. Primarily, it serves the plant itself to store energy.<\/p>\n<p>We also absorb <strong>dietary fiber<\/strong> through plant foods. Like starch, they are made up of many, many simple sugars. However, they are connected in a special way so that humans cannot break them down during digestion. Dietary fiber is therefore often referred to as indigestible carbohydrates.<\/p>\n<ul>\n<li><strong>Glycogen<\/strong> = branched chain of glucose molecules.<br \/>\nUp to 50,000 glucose building blocks are linked to a central protein (glycogenin).<\/li>\n<li><strong>Starch<\/strong> consists of\n<ul>\n<li>20-30 % from <em>amylose<\/em> = unbranched chain of glucose molecules<\/li>\n<li>70-80% from <em>amylopectin<\/em> = branched chain of glucose molecules<\/li>\n<\/ul>\n<\/li>\n<li><strong>Dietary fiber<\/strong> can\n<ul>\n<li>be <em>water-soluble<\/em>, such as locust bean gum<\/li>\n<li>be <em>insoluble in water<\/em>, such as cellulose<\/li>\n<li>consist of complexly linked carbohydrate building blocks<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>[\/vc_column_text]<div class=\"templatera_shortcode\"><div class=\"vc_container vc_maxwidth \"><div class=\"vc_row wpb_row vc_row-fluid vpt-3 vpb-3 bg--color--bg-primary vc_boxpadding\"><div class=\"wpb_column vc_column_container vc_col-sm-12 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