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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
![Conjunctivitis, with the characteristic “pinkeye” appearance. A yellow crusty exudate is also common](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_36_55_93941824.jpeg)
![Over the past four decades, the self-reported health of married men and women has remained high, ...](https://biology-forums.com/gallery/47/medium_660365_23_12_16_3_52_08_243681070.jpeg)