11 votes

Did science backtrack regarding coffee causing dehydration?

Why it has been long assumed that caffeine or coffee is dehydrating? Because caffeine is a mild diuretic - it stimulates water excretion through the kidneys. But the amount of water you consume with ...
  • 15.7k
10 votes

Does blood donation reduce the risk of cardiovascular disease?

In premenopausal women, the risk of developing atherosclerosis is half that of men. In 1991, Sullivan proposed the iron hypothesis which attributed this decreased risk to premenopausal women's lower ...
  • 1,680
7 votes
Accepted

Is it true that alcohol is the only "drug" one can die from during a drug-withdrawal? What are the symptoms of the withdrawal?

In addition to alcohol, benzodiazepines and the opiates (rare), another class of drugs that can cause lethal withdrawal symptoms is the barbiturates. In fact, they present the most dangerous ...
  • 9,464
4 votes
Accepted

Does eating any kind of seafood lengthen the healing time of an injury?

There is some weak evidence that high intake of fish high in omega-3 fatty acids EPA and DHA (salmon, mackerel, roe, anchovies, tuna, herring, sablefish, sardines) or fish oil capsules might delay ...
  • 15.7k
4 votes

How is a beard dirtier than a toilet?

A better comparison than "beard vs toilet" may be "face with beard vs face without beard." This is actually a reasonable concern in the context of healthcare, where healthcare staff can be a vector ...
  • 12.6k
4 votes

Why is aspiration not commonly used for IM vaccine administration in the U.S.?

The CDC gives this as the reason why not: Aspiration before injection of vaccines or toxoids (i.e., pulling back on the syringe plunger after needle insertion but before injection) is not necessary ...
  • 5,823
4 votes

Does 'Stockholm Syndrome' really exist?

Stockholm Syndrome does exist. It has an exceptionally high face validity. It does have this attribute due to many case reports available in the non-medical newspapers. You see a pattern, you have a ...
  • 6,827
3 votes
Accepted

If alcohol and coffee are both diuretics -- why do so many intoxicated ppl drink coffee to sober up? Dehydration concern.

No, nothing will "sober up" a drunk; only time does that. What coffee does is provide caffeine, a stimulant. The stimulant effects will increase alertness, but they will do nothing for perception, ...
  • 9,464
3 votes
Accepted

Why do pupils dilate when someone says a lie? Other physicial symptoms when someone is lying?

The phenomenon you are describing of the pupils dilating when telling a lie has to do with the way the muscles around the eye are wired to the nervous system, and more specifically, the autonomic ...
  • 1,608
2 votes
Accepted

If evolution is effective, why do men still have nipples? In extreme situations, can fathers lactate?

Males secrete factors that block the development of female ducts and structures. Once the male embryo produces testosterone, the hormone can influence other sex-specific traits around the body. Men ...
  • 1,858
2 votes
Accepted

Are cell phones still prohibited from the ER or other medical facilities? Why or why not?

Cairo University's Journal of Advanced Research (PDF) looks at all of the studies on ElectroMagnetic Interferene (EMI) from mobile cellular phones and medical equipment. It says that based on the ...
  • 5,920
2 votes

Does shaving causes the hair to grow faster?

No. Shaving your facial hair (i.e. beard) or any part of your body for that matter will not make it grow back faster. There is nothing proven scientifically or otherwise that has claimed that when a ...
2 votes
Accepted

Does photographic (eidetic) memory exist or is it a medical myth?

Yes, both eidetic memory and hyperthemsia exist. And photographic memory has never been proven to exist. But they aren't what pop culture advertises them as. Hyperthemsia first. It is the ability of ...
  • 194
2 votes

Why are cooked carrots not recommended during constipation?

Cooking in general decreases the insoluble dietary fiber contents and increases the soluble fraction. I guess this is the theoretical basis for the claim(s) regarding cooked carrots (and other cooked ...
  • 5,823
1 vote

Evidence for temperature and humidity causing respiratory illnesses

You're right, evidence shows its viruses and bacteria that cause cold. The question is, does cold temperatures contribute to increasing your chances of contracting a virus? The simple answer is yes, ...
1 vote

Does 'Stockholm Syndrome' really exist?

Stockholm Syndrome certainly does exist. It is a manifestation of capture-bonding, an evolutionary psychology[1] term for the evolved psychological mechanism[2] behind Stockholm syndrome. John Tooby (...
1 vote

If evolution is effective, why do men still have nipples? In extreme situations, can fathers lactate?

Evolution tends to select out traits that are harmful (in quite simple terms) AND expressed soon enough to negatively affect reproductive success. Nipples (and breast tissue) on males are extremely ...
  • 107
1 vote

Does shaving causes the hair to grow faster?

No, shaving does not cause hair to grow faster. People believe it is true for several reasons Your hair might be just growing faster now because of puberty, which is when people usually start shaving ...
1 vote

Toxicity of carbon tetrachloride exaggerated?

Carbon tetrachloride (CCl4) is very toxic. It can cause both serious acute and chronic effects. The severity of effects depends on several factors such as: dose length of exposure frequency of ...
  • 2,823
1 vote

Is it true that alcohol is the only "drug" one can die from during a drug-withdrawal? What are the symptoms of the withdrawal?

American Addiction Centers The symptoms are Stage 1: Anxiety, insomnia, nausea, and abdominal pain characterize this stage, which begins 8 hours after the last drink. Stage 2: High blood pressure, ...
  • 324
1 vote
Accepted

Is the spit test for candida legitimate?

You're correct, your friend is indeed gullible. Oropharyngeal candidiasis can be diagnosed by an experienced clinician by looking at the mouth to see characteristic plaques, or by taking swabs for ...
  • 13.1k

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