{"id":1070,"date":"2016-08-01T09:48:28","date_gmt":"2016-08-01T09:48:28","guid":{"rendered":"https:\/\/www.testofuel.com\/tf\/?p=1070"},"modified":"2017-08-02T11:05:23","modified_gmt":"2017-08-02T11:05:23","slug":"all-you-need-to-know-about-testosterone","status":"publish","type":"post","link":"https:\/\/www.testofuel.com\/tf\/all-you-need-to-know-about-testosterone\/","title":{"rendered":"All You Need To Know About Testosterone"},"content":{"rendered":"<p>Testosterone is the bedrock of your muscle mass, your sexuality and various other functions in the body.\u00a0When working properly it can give you the following benefits:<\/p>\n<ul>\n<li>Increased Muscle Mass<\/li>\n<li>Good Quality Sleep<\/li>\n<li>Better Sexual Health and Erection Quality<\/li>\n<li>Improved Strength<\/li>\n<li>Fat Loss<\/li>\n<li>Positive Mood and Confidence<\/li>\n<li>Healthy Bone Density<\/li>\n<li>More Focus and Concentration<\/li>\n<li>And many more!<\/li>\n<\/ul>\n<p><strong>But what is Testosterone? And why is it so good for our bodies.<\/strong><\/p>\n<p>In this article we answer the most popular questions about this male hormone, providing you with everything you need to know.<\/p>\n<p><strong>It&#8217;s a long one, so just in case you&#8217;re after something specific, here&#8217;s what we&#8217;ll cover:<\/strong><\/p>\n<ul>\n<li>What is T?<\/li>\n<li>Where is it made?<\/li>\n<li>What does it do?<\/li>\n<li>Do women have testosterone levels?<\/li>\n<li>What happens to natural levels as we age?<\/li>\n<li>Is T\u00a0a steroid?<\/li>\n<\/ul>\n<hr \/>\n<h2>What is testosterone?<\/h2>\n<p>Testosterone (T) is a steroid hormone produced by the Leydig cells of the testes in men, and the ovaries in women. It is classed as an\u00a0<em><strong>androgen\u00a0<\/strong><\/em>as it\u00a0<strong>controls the development and maintenance of male characteristics. <\/strong>Other androgen hormones include\u00a0dihydrotestosterone (DHT), dehydroepiandrosterone (DHEA), androstenedione, and androstenediol.<\/p>\n<p>Androgens form one of five categories of steroid hormones alongside estrogens, glucocorticoids, mineralocorticoids and\u00a0 progestogens. Vitamin D is also closely related to these categories and could be classed as the sixth hormone system. Bile acids also have similar properties.<\/p>\n<p>Our male hormone\u00a0has two categories of effects:<\/p>\n<ul>\n<li><strong>Androgenic<\/strong> &#8211; actions primarily include development of male characteristics \u2013 increased strength, voice deepening and hair growth<\/li>\n<li><strong>Anabolic<\/strong>\u00a0&#8211;\u00a0actions include increased protein metabolism and inhibition of protein breakdown<\/li>\n<\/ul>\n<hr \/>\n<div class=\"group infobox infobox-blue mtop20 mbottom20\">\n<p><em><strong>Key Point:<\/strong><\/em>\u00a0T is responsible for regulating muscle and bone mass, libido, energy and immune function.<\/p>\n<\/div>\n<hr \/>\n<h2>The effects of testosterone on the body<\/h2>\n<p>As we age towards puberty we see our first significant increase in T and it is this hormone increase that begins the physical changes ultimately responsible for turning\u00a0a boy into a man. In order to do this the following changes occur:<\/p>\n<ul>\n<li>Deepening of the voice<\/li>\n<li>Growth of the penis and testes<\/li>\n<li>Growth of hair &#8211; in particular around facial, pubic, and body\u00a0areas<\/li>\n<li>Increased\u00a0muscle growth and bones density<\/li>\n<li>Increase in height &#8211; growth spurt<\/li>\n<\/ul>\n<hr \/>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-1079 size-full\" src=\"https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/What-is-Testosterone.jpg\" alt=\"What-is-Testosterone\" width=\"800\" height=\"451\" srcset=\"https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/What-is-Testosterone.jpg 800w, https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/What-is-Testosterone-150x85.jpg 150w, https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/What-is-Testosterone-300x169.jpg 300w, https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/What-is-Testosterone-768x433.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<hr \/>\n<h2>How does testosterone work?<\/h2>\n<p>T\u00a0is controlled and regulated by the <em><strong>hypothalamic-pituitary-gonodal (HPG)\u00a0<\/strong><\/em>axis which is made up of the hypothalamus, the pituitary gland and the testes. Within this system are a number of regulatory hormones each with their own specific roles. Here are the main hormones you need to know about:<\/p>\n<ul>\n<li><span style=\"color: #333333;\"><strong>G<\/strong><b>onadotropin-releasing hormone (GnRH)\u00a0<\/b>is released by the hypothalamus and sends signals to the pituitary gland to release its own hormones.<\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"color: #333333;\">The pituitary gland then releases<strong> L<\/strong><b>uteinizing hormone (LH)<\/b> and <b>follicle-stimulating hormone (FSH)<\/b>\u00a0 into the main\u00a0circulation of the bloodstream &#8211; they bind to receptors in the testes as a way of controlling the release of T.\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li>LH also regulates the enzymatic reaction of <strong>cholesterol <\/strong>and allows it to synthesize T\u00a0in the Leydig cells of the testes. It does this via a conversion to firstly\u00a0<strong>pregnenolone<\/strong>, then <strong>Dehydroepiandrosterone<\/strong>\u00a0<strong>(DHEA)<\/strong>.<\/li>\n<\/ul>\n<hr \/>\n<div class=\"group infobox infobox-blue mtop20 mbottom20\">\n<p><span style=\"text-decoration: underline;\"><strong>Key Point:<\/strong><\/span> All steroid hormone production begins with cholesterol, which is synthesized by the leydig cells of the testes.<\/p>\n<\/div>\n<hr \/>\n<h2>How do we measure T?<\/h2>\n<p>A large proportion\u00a0of the T\u00a0in the blood circulates bound to two main proteins, <strong>albumin<\/strong> and <strong>sex hormone binding globulin<\/strong> (SHBG). Only a small amount of testosterone (around 3%) is not bound to these proteins, meaning that it is bioavailable, or \u00a0\u2018free\u2019.<\/p>\n<p>T\u00a0can be measured from either your saliva or from your blood. If you ever have a drugs test (if you are an athlete for example) then this may be accompanied by a urine test for other androgens as well.<\/p>\n<p>The free testosterone is completely available for use by your tissues and as T\u00a0is only loosely bound to albumin this\u00a0may also be available as well &#8211; <em><strong>so basically, if it isn&#8217;t bound to SHBG it is available for use by the body.<\/strong><\/em><\/p>\n<p>Both free and bio-available T levels\u00a0provide a measure of the amount of T\u00a0available to tissues and they give the same information.\u00a0 Free T\u00a0is calculated from the testosterone and SHBG results whereas bioavailable testosterone is a separate measurement.<\/p>\n<p>A lot of our free T\u00a0is converted within the cells to a very\u00a0potent androgen called <strong>dihydrotestosterone (DHT)<\/strong> &#8211; by the enzyme 5-alpha reductase. Some T is also coverted into estrogens via the <strong>aromatase <\/strong>enzymes<strong>.\u00a0<\/strong><\/p>\n<p>Typically you can measure your T levels using either <strong>total\u00a0<\/strong>(or serum) testosterone or free T. In normal adults\u00a0<em><strong>a male will have between 300-1000 ng\/dL and a female will have around 15-70 ng\/dL of total T.\u00a0<\/strong><\/em><\/p>\n<hr \/>\n<div class=\"group infobox infobox-blue mtop20 mbottom20\">\n<p><em><span style=\"text-decoration: underline;\"><strong>Key Point:<\/strong><\/span><strong>\u00a0<\/strong><\/em>For males, anything less than 300 ng\/dL is called as\u00a0<strong>hypogonadism<\/strong> &#8211; low testosterone levels.<\/p>\n<\/div>\n<hr \/>\n<h2>Do testosterone levels change throughout the day?<\/h2>\n<p>The body works on a\u00a0<em><strong><a href=\"https:\/\/www.testofuel.com\/tf\/circadian-rhythm-testosterone-best-time-workout\/\">circadian\u00a0rhythm<\/a>\u00a0<\/strong><\/em>&#8211; an inbuilt 24 hour clock based around sleep and wake cycles. Subsequently all of the hormones and receptors previously mentioned work hard to regulate T throughout the day, but allow for natural &#8216;pulses&#8217; where it peaks and dips throughout a day. T levels are:<\/p>\n<p><strong>Highest between 05:30 \u2013 08:00 hours and l<\/strong><strong>owest between 18:30 \u2013 22:00 hours \u00a0<\/strong><\/p>\n<p>As the hypothalamic-pituitary-gonodal axis relies on so many hormones and receptors working in synergy, you&#8217;ll find that peaks in total T levels are not just due to increase release from the testes themselves, but also inhibition of other hormones and reduction in its blood flow\u00a0clearance. The opposite occurs when T levels are at their lowest.<\/p>\n<hr \/>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-1080 size-full\" src=\"https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/Testosterone.jpg\" alt=\"Testosterone\" width=\"800\" height=\"450\" srcset=\"https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/Testosterone.jpg 800w, https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/Testosterone-150x84.jpg 150w, https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/Testosterone-300x169.jpg 300w, https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/Testosterone-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<hr \/>\n<div class=\"group infobox infobox-blue mtop20 mbottom20\">\n<p><em><strong>Key Point:<\/strong><\/em> T levels peak in the morning and are lowest in the evening.<\/p>\n<\/div>\n<hr \/>\n<h2>Is testosterone a steroid?<\/h2>\n<p>This is covered in much more detail <strong><a href=\"https:\/\/www.testofuel.com\/tf\/how-do-anabolic-steroids-work\/\">here<\/a><\/strong>, but ultimately yes T is a <strong>naturally occurring<\/strong> steroid.<\/p>\n<p>Anabolic steroids, or\u00a0<em><strong>Anabolic-androgenic steroids (AAS)\u00a0<\/strong><\/em>are synthetic versions of our male hormones\u00a0that match the anabolic and androgenic effects of T.<\/p>\n<p>Steroids\u00a0are often taken to <strong>increase size, strength and power<\/strong>, as well as to <strong>boost endurance and energy<\/strong>.<\/p>\n<p>There are lots of different types of anabolic steroids available, but the main ones\u00a0mirror the main hormones of the HPG axis, namely\u00a0<strong>testosterone<\/strong>\u00a0and<strong>\u00a0dihydrotestosterone (DHT).\u00a0<\/strong><\/p>\n<hr \/>\n<div class=\"group infobox infobox-blue mtop20 mbottom20\">\n<p><em><span style=\"text-decoration: underline;\"><strong>Key Point:<\/strong><\/span><\/em> Anabolic steroids are synthetic versions of androgen hormones such as testosterone.<\/p>\n<\/div>\n<hr \/>\n<h2>Testosterone &#8211; What You Need To Know<\/h2>\n<p>Testosterone is a male hormone produced in the Leydig cells of the testes. When functioning properly it promotes development of muscle mass and strength, as well as ensuring optimal health by regulating bone health, sleep quality, sexual health, fat loss and cognitive ability.<\/p>\n<p>As an androgen, steroid hormone, T is also responsible for male characteristics such as voice deepening and hair growth.<\/p>\n<p>Testosterone\u00a0is controlled and regulated by the\u00a0hypothalamic-pituitary-gonodal<strong><em>\u00a0<\/em><\/strong>axis which is made up of the hypothalamus, the pituitary gland and the testes. Within this system are a number of regulatory hormones each with their own specific roles such as follicle stimulating hormone and luteinizing hormone.<\/p>\n<p>Formulated through cholesterol, T levels can be measured in a number of different ways, but more commonly using free and total values. Natural circadian rhythm mean that levels fluctuate throughout the day, however measuring free and total values of testosterone can be used to assess whether your levels are in the normal or low-high ranges.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Testosterone is the bedrock of your muscle mass, your sexuality and various other functions in the body.\u00a0When working properly it can give you the following benefits: Increased Muscle Mass Good Quality Sleep Better Sexual Health and Erection Quality Improved Strength Fat Loss Positive Mood and Confidence Healthy Bone Density More Focus and Concentration And many [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":1081,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[54],"tags":[143,144,146,141,145],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.2.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>All You Need To Know About Testosterone - TestoFuel Blog<\/title>\n<meta name=\"description\" content=\"Testosterone (T) is a steroid hormone produced by the Leydig cells of the testes in men, and the ovaries in women. It is classed as an androgen as it controls the development and maintenance of male characteristics. Other androgen hormones include dihydrotestosterone (DHT), dehydroepiandrosterone (DHEA), androstenedione, and androstenediol.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.testofuel.com\/tf\/all-you-need-to-know-about-testosterone\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"All You Need To Know About Testosterone - TestoFuel Blog\" \/>\n<meta property=\"og:description\" content=\"Testosterone (T) is a steroid hormone produced by the Leydig cells of the testes in men, and the ovaries in women. It is classed as an androgen as it controls the development and maintenance of male characteristics. Other androgen hormones include dihydrotestosterone (DHT), dehydroepiandrosterone (DHEA), androstenedione, and androstenediol.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.testofuel.com\/tf\/all-you-need-to-know-about-testosterone\/\" \/>\n<meta property=\"og:site_name\" content=\"TestoFuel Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/TestoFuel\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-08-01T09:48:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-08-02T11:05:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.testofuel.com\/tf\/wp-content\/uploads\/2016\/07\/What-is-testosterone-and-what-does-it-do.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"450\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Lee\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@testofuel\" \/>\n<meta name=\"twitter:site\" content=\"@testofuel\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lee\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.testofuel.com\/tf\/all-you-need-to-know-about-testosterone\/\",\"url\":\"https:\/\/www.testofuel.com\/tf\/all-you-need-to-know-about-testosterone\/\",\"name\":\"All You Need To Know About Testosterone - TestoFuel Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.testofuel.com\/tf\/#website\"},\"datePublished\":\"2016-08-01T09:48:28+00:00\",\"dateModified\":\"2017-08-02T11:05:23+00:00\",\"author\":{\"@id\":\"https:\/\/www.testofuel.com\/tf\/#\/schema\/person\/265972121a38bf60ea404977c4f0a738\"},\"description\":\"Testosterone (T) is a steroid hormone produced by the Leydig cells of the testes in men, and the ovaries in women. 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It is classed as an androgen as it controls the development and maintenance of male characteristics. Other androgen hormones include dihydrotestosterone (DHT), dehydroepiandrosterone (DHEA), androstenedione, and androstenediol.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.testofuel.com\/tf\/all-you-need-to-know-about-testosterone\/","og_locale":"en_US","og_type":"article","og_title":"All You Need To Know About Testosterone - TestoFuel Blog","og_description":"Testosterone (T) is a steroid hormone produced by the Leydig cells of the testes in men, and the ovaries in women. It is classed as an androgen as it controls the development and maintenance of male characteristics. 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