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Does mouthwash affect your immune system?
health.howstuffworks.com/human-body/systems/immune/does-mouthwash-affect-immune-system.htm
Some scientists think your mouthwash could be hurting your immune system. Is there something sinister lurking in your oral care routine?
Are expired over-the-counter drugs OK to use?
health.howstuffworks.com/medicine/medication/are-expired-over-counter-drugs-ok-to-use.htm
Are those expired meds even working? Or, worse, are they causing you harm? Find out if over-the-counter drugs are OK to use.
Is it possible to make yourself allergic to something?
Many allergies develop later in life. Learn whether it is possible to make yourself allergic to something at HowStuffWorks.
How Standardized Patients Work
money.howstuffworks.com/standardized-patient.htm
Did you know there's an occupation that combines acting and medicine? Learn more about standardized patients at HowStuffWorks.
Why do some people learn new languages easily and some don't?
people.howstuffworks.com/learn-new-languages-easily.htm
Some people learn new languages easily and for other people the process can take several years. Find out why some people learn new languages easily.
Wasted Food in the U.S. Could Feed Much of Population
recipes.howstuffworks.com/all-wasted-food-in-u-s-could-feed-84-population.htm
In the US, 21 percent of landfill space is filled with food. HowStuffWorks looks at new proposals that aim to reduce food waste by 50%.
What Is the Ring Test for Gender?
people.howstuffworks.com/ring-test-for-unborn-baby-sex.htm
Tempted to try the ring test for gender hints before making it all seven weeks into the pregnancy? Some people swear by it despite lacking scientific evidence.
How Caffeine Works
science.howstuffworks.com/caffeine.htm
Caffeine is one of the most commonly-used drugs -- 90% of Americans use it. Learn why caffeine is America's most popular drug and what it does to your body.
Do skinny people get more wrinkles?
health.howstuffworks.com/skin-care/beauty/anti-aging/more-wrinkles.htm
Everyone wants to avoid more wrinkles, but does how much you weigh determine how your face will age? See if your weight will predict more wrinkles.
The Hannibal Lecter Quiz
play.howstuffworks.com/quiz/hannibal-lecter-quiz
Think all there is to Hannibal Lecter is liver recipes and that creepy face mask? See if you can develop an accurate psychological profile of "Hannibal the Cannibal" with this delicious quiz.