The most common test for testosterone involves your physician drawing a tube of blood from your vein. In addition to the blood sample, your physician will also perform a physical exam. Because low testosterone may be an indicator for an underlying problem, like a problem with the pituitary gland, liver disease, an inherited disease, or Addison's disease, your doctor may want to test you for an underlying problem if you have low testosterone. Depending on your physical exam, your symptoms, and your history, other tests may be required after the testosterone test. Your doctor may test for thyroid function, diabetes, high blood pressure, and heart disease. Testosterone can also be measured in your saliva, though not many mainstream physicians offer this option. The test is reasonably reliable, but it is too new of a method to be totally accepted. Two reputable labs that test for salivary testosterone are ZRTLabs and Labrix. If your total testosterone from your screening lab test comes back abnormal, ask to have the test for “free” or bioavailable testosterone. The most important testosterone value is the “free” and/or bioavailable testosterone.  This is not always measured because it is not so easy to measure. The tests for “free” or bioavailable testosterone are considered better biomarkers. There are things that might affect the results of your test. Taking medicines with estrogen or testosterone (including birth control), digoxin, spironolactone, and barbiturates may interfere with the test. Medicines for prostate cancer and that raise prolactin levels may also have a negative effect. Hypothyroidism can also interfere with the test. If your testosterone levels are low, talk to your physician about testosterone replacement therapy. Testosterone is available as a gel or patch, muscular injections, or tablets that can be dissolved under the tongue. There are also some natural options including dietary approaches, increased exercise, and herbs such as Tribulus terrestris, Ashwagandha, Ginkgo Biloba, Maca, and Yohimbe.
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One-sentence summary -- Go to the doctor for a testosterone test. Be prepared for additional tests. Get an oral test. The most common test is for “total testosterone,” which is the testosterone that is bound to other proteins in the blood. Consider what affects the test. Choose a testosterone replacement therapy.


If your Mac is so frozen that you can't interact with any on-screen items or even move the cursor, skip the next two steps. If you can still interact with some of the on-screen items, you may want to try force-quitting the program that's causing your Mac to freeze. If your Mac froze after you opened a specific application, you can try force-quitting the application by doing the following:  Press ⌘ Command+⌥ Option+Esc to bring up the Force Quit window. Click the program you want to force-quit. Click Force Quit at the bottom of the window. Click Force Quit if prompted. If you've determined that you're unable to force-quit the problematic program, try saving any in-progress work in any responsive programs. You can usually do this by pressing ⌘ Command+S while in the program's window.  Since forcing your Mac to shut down will also cause all open programs to close, you may lose unsaved work. Many programs, such as those in the Microsoft Office suite, will save a backup of your work that you can restore upon restarting your Mac. Most Macs have a physical button with the "Power" {"smallUrl":"https:\/\/www.wikihow.com\/images\/5\/5d\/Windowspower.png","bigUrl":"\/images\/thumb\/5\/5d\/Windowspower.png\/30px-Windowspower.png","smallWidth":460,"smallHeight":460,"bigWidth":"30","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of a Windows icon.\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Public_domain\">Public Domain<\/a><br>\n<\/p><\/div>"} icon that you can press to turn off your Mac:   MacBook without Touch Bar — The "Power" key is in the top-right side of the keyboard.  MacBook with Touch Bar — The "Power" button is the Touch ID section on the far-right side of the Touch Bar.  iMac — You'll find the "Power" button behind the lower-left side of the iMac's screen. Once you've found the "Power" button, press down on it and don't release it until the screen turns off. This signifies that your Mac has turned off. It may take your Mac up to a minute to finish turning off completely, so make sure that your Mac has stopped making noise before you proceed. Once your Mac has shut down entirely, you can press the "Power" button once to turn back on your Mac. When it finishes restarting, your Mac should be unfrozen. If your Mac is still frozen after restarting, try troubleshooting your Mac.
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One-sentence summary --
Determine the severity of your Mac's condition. Try force-quitting an application. Try to save any open work. Find your Mac's "Power" button. Press and hold the "Power" button. Release the "Power" button when the screen goes black. Turn back on your Mac after a minute.