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1500 questions
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2 answers

Do we produce Vitamin D in the shade?

Do our bodies produce Vitamin D in the shade? If so, what is the percentage decrease in the amount of Vitamin D produced compared to full exposure to sunlight? For example, sitting outside in the sun will result in the production of x units of…
End Anti-Semitic Hate
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How should ovo-lacto vegetarians compensate the lack of meat in their diets?

An ovo-lacto vegetarian includes both eggs and dairy products in his diet, but meat is completely excluded. In a regular non-vegetarian diet, meat is very important and provides many benefits if properly consumed. I've heard of many problems that…
NPN328
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Is HIV the cause of AIDS?

That HIV causes AIDS always seemed like an obvious fact to me, this seemed to be the widely accepted opinion. But just now I found the article "Questioning the HIV-AIDS hypothesis: 30 years of dissent" in a peer-reviewed journal. According to that…
Dr. House
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Is there any proof that acupuncture is an effective pain remedy?

I have heard of acupuncture being used for pain management. Are there clear scientific proofs that indicate it is more effective than a placebo treatment for pain? If so what types of pain has it been shown to effective for?
James Jenkins
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What are the long-term side effects of melatonin?

What are the long-term side effects of taking melatonin as an oral supplement? The couple of articles I have read are inconclusive: http://www.huffingtonpost.com/2015/03/11/what-is-melatonin-sleep_n_6795220.html Although you can't overdose on…
Franck Dernoncourt
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Why do drugs expire?

I've googled through internet, and all I found was "what expiration dates mean". I found nothing about the underlying mechanism of expiration. As drugs are chemicals, why do they expire? Are there chemical reactions that produce other chemicals?
asmani
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What to do if someone breaks a bone?

I was wondering today about what someone should do immediately after either they or someone else had a fractured / broken bone. What first aid / steps should be taken after this happens? Is this something you'd call 911 for immediately and need an…
schizoid04
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In what ways do studies indicate that smoking marijuana is detrimental to long-term health, if any?

I've heard a lot of conflicting information about the long-term effects. Could someone please clarify at least the proven risks? Note: I've decided to answer my own question, but I'd prefer to hear from others too. Following the guidelines of this…
Dave Liu
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Does intake of processed sugar lower the immune system?

Growing up, my parents were very strict about sugar intake, because they had heard "somewhere" that eating refined sugar lowered your immune system function for 12-24 hours. At the time, this seemed to be anecdotally true to me, because as a kid if…
Nate Barbettini
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Can you sleep less permanently, but stay at least as healthy?

Can you train yourself to sleep fewer number of hours forever, nightly, while remaining at least as fit and healthful (without harming or impairing yourself in any way) ? This question was inspired by this article on Columbia Professor Jeffrey…
user14
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3 answers

How accurate are coronavirus tests?

As of time of writing it's quite common to see headlines about so-and-so who have tested positive for Covid-19, e.g. Canadian PM Justin Trudeau's wife, Sophie, tests positive for coronavirus, officials say However, these articles don't usually say…
Allure
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Are computers bad for health?

I am a CS student, so my career requires sitting for long periods of time (8~9) hours infront of a laptop daily. I've been hearing for quite a long time that computers are harmful for health. I'm really concerned with my health but I'm comfortable…
Amr Ayman
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What effect does long-term caffeine use have on memory?

I've seen plenty of references to the same study of how caffeine benefits memory after one day of use (1) (2) (3), but what about long-term use? There are all sort of factors to long-term use such as sleep and adapting to dosage, and I'm extremely…
Ein Doofus
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Do you bleed to death after your penis is cut off?

I wonder If a person without knowledge and tools cuts off somebody's penis and then doesn't call an ambulance immediately, is there a chance a person may not bleed to death within a short time? I would also like to know if you can still urinate,…
Zuzana Teichmann
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Are calcium supplements harmful, even if you stay short of the maximum dose?

Source: Do You Really Need Calcium Supplements?, Margaret Polaneczky MD, 2014 Oct 2 You may also have heard that taking calcium supplements can lead to heart disease. It’s still an open question. Some studies suggest up to a 20% increase in heart…
user14
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