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20
votes
2answers
3k views

Is eating a meal with 2000 Calories at once any different from eating 4 times at 500 Calories?

I wonder if there any difference in how many times I eat per day? Let's say I eat one big meal in the morning at 2000 kcal (at 9am). Is that any different than having 4 meals at 500 kcal throughout ...
20
votes
1answer
1k views

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 ...
19
votes
1answer
295 views

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. ...
19
votes
2answers
30k views

Is Low Blue Light helpful for preserving eyesight?

I'm a coder and interested in save my eyesight. I've met the term named low blue light. Monitors decrease the level of blue color and theoretically protect my eyes. Here's a quote from monitor ...
19
votes
1answer
358 views

How do you read a US nutrition label?

I want to clean up my diet, and be more aware of what I'm eating and how much, but I'm not sure how to read a nutrition label. I see the breakdowns of various vitamins, the calories and the ...
19
votes
2answers
486 views

Can long term sleeping at day damage your health?

I've passed half or more of my life, sleeping in very late and often after the sun rises. Now I believe that I'm already feeling its effect. Some of my hormones are under the ideal levels and I have a ...
19
votes
1answer
591 views

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-...
18
votes
4answers
1k views

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 ...
18
votes
5answers
1k views

Is exceeding the US RDA for vitamin C dangerous?

When I travel I take vitamin C supplements. The product I use has 1000 mg of vitamin C. When traveling I take multiple doses every day. This way exceeds the US RDA of 90 mg for adult males. Is it bad ...
18
votes
1answer
338 views

Does sugar cause children to become hyperactive?

When I was younger, I was told not to have too much sugar (candy, soda, ice cream - anything sweet really) because I would get too hyper and I wouldn't be able to sleep at night. I never really felt ...
18
votes
2answers
772 views

Can you sleep less permanently, but stay at least as healthy? [duplicate]

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 ...
18
votes
1answer
839 views

Are there any proven benefits of electric toothbrushes over manual toothbrushing?

Advertising has extolled the benefits of electric-powered toothbrushes for decades now, and dentists seem to prefer certain brands over others, some even selling them in their offices. In almost every ...
18
votes
1answer
342 views

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 ...
18
votes
1answer
946 views

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 ...
18
votes
1answer
4k views

What is the likelihood of contracting genital HSV1 through oral sex?

I know genital HSV1 can be contracted from unprotected oral sex, but what is the actual likelihood? For example, what is the likelihood when the partner is asymptomatic vs symptomatic, and what is ...
18
votes
2answers
3k views

Does frequent showering change the amount of oils our skin produces?

The skin produces natural oils, but when we shower, we remove those with water and wiping down. I'm wondering if our bodies adjust to the constant showering by producing oils faster. Sometimes, if I ...
17
votes
2answers
2k views

Side effects of genetically modified food products

We are genetically modifying crops to change the way they look, to produce more out of less, or to make them resistant to certain diseases; they are subsequently being consumed by humans and animals. ...
17
votes
3answers
2k views

Why am I advised not to eat immediately before exercise?

It is commonly said that, after eating, you should wait 2-3 hours before exercising. It isn't recommended to eat and right afterwards to exercise (or swim). But I haven't really understood why that ...
17
votes
1answer
7k views

Is brushing teeth without toothpaste actually harmful?

Another user mentioned that brushing teeth without toothpaste is dangerous because it's "likely to cause micro-scratches in the enamel of one's teeth". How true is the claim? To be exact, let's ...
17
votes
1answer
286 views

Does blood donation reduce the risk of cardiovascular disease?

While answering this question about the possible detrimental effects of iron deficiency caused by frequent blood donation, I was reminded of a theory I heard long ago about a possible benefit of mild ...
17
votes
1answer
473 views

Are there any side effects to cracking knuckles?

I constantly crack (or pop) my knuckles. Are there any negative (or positive) side effects to it? I like to crack my knuckles, but I want to stop if it can have negative effects. What have scientific ...
17
votes
2answers
24k views

Will eye floaters ever disappear?

According to wikipedia on eye floaters: Floaters are often caused by the normal aging process and will usually disappear as the brain learns to ignore them. Even if this might be the case for very ...
17
votes
1answer
305 views

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 ...
17
votes
2answers
393 views

Does sleep irregularity affect my brain and health?

For more than two years I have been sleeping irregularity. Sometimes I go to the bed at 10am, some days it may 10pm.There no regularity to when I sleep. Also, sleep time may differ. Sometimes I ...
17
votes
1answer
230 views

Sex as a generic medical treatment modality?

Sex therapy (including clinical, licensed sex itself) is a treatment option for sexual health issues - when there are problems and goals pertaining to sex itself. Sexual health tends to be studied ...
17
votes
2answers
259 views

How much risk am I taking by joining my coworkers for smoke breaks?

Several of my coworkers take regular smoke breaks outside the office a few times per day. I don't smoke, but I join them once or twice a day. There are a few reasons why I find it valuable to do this: ...
16
votes
2answers
271 views

Why is thalidomide a current drug on the market?

Given the thalidomide birth defect disaster of the 1960s, why was it later approved by the U.S. FDA for treatment of leprosy (1996) and of multiple myeloma (2006)? Presumably, the teratogenic issues ...
16
votes
2answers
60k views

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 ...
16
votes
2answers
183 views

What's the rush in the case of sudden hearing loss?

I've heard from both an ENT (ear, nose, and throat doctor) and an audiologist (hearing specialist) that in the case of sudden hearing loss, time is of the essence, and the patient should be seen as ...
16
votes
3answers
940 views

Advantages of transition from non-vegetarian to vegetarian

Influenced by PETA, a lot of people have already changed to vegan status. I would like to know how well the transition may work? It can be either in a physical or mental way. Some have changed for ...
16
votes
1answer
5k views

Medical professionals referring to 'left' and 'right': are they referring to my relative directions or theirs?

Given that they're facing me and I'm facing them. Excerpt from radiologist report: ... there is narrowing of the left neural foramen in comparison to the right ... but whose? Additionally: Is ...
16
votes
2answers
456 views

Why is natural sugar healthier than refined sugar?

The WHO recently published this recommendation regarding sugar consumption: Keeping intake of free sugars to less than 10% of total energy intake reduces the risk of overweight, obesity and tooth ...
16
votes
3answers
30k views

Oxygen saturation value of smokers

A person's O2 saturation, when measured in ambiant air at sea level with a pulse oxymeter (SpO2), is considered as normal between 95 and 100%. I've read (non-sourced Wikipedia FR fragment, no ...
16
votes
2answers
18k views

Is “smokers lungs” a lie?

We've probably all seen photos of smokers' lungs compared to non-smokers lungs. For example: These images are commonly used in anti-smoking materials, at least in the US, and I've never had cause to ...
16
votes
2answers
2k views

How are ratios for one person CPR arrived at?

I have not had a CPR (Cardiopulmonary resuscitation) class in 10 or more years, but I used to take them all the time (like yearly). For one person CPR the ratio of compression to breaths was always ...
16
votes
2answers
70k views

Why does my antibiotic make my urine yellow?

When I was given antibiotics for fever by my doctor, I noticed that my urine is unusually yellow. Why is that?
16
votes
1answer
907 views

How do antihistamines work?

We recently got some new kittens and my step son is allergic to them. He mostly suffers from a runny nose, but also had itchy eye last night after he Left a robe in the kitten room all day Put it ...
16
votes
1answer
330 views

Which are the effects of removing sugars from a balanced diet for an otherwise healthy person

What effects would removing sugars from a balanced diet have on an otherwise healthy person have? I've heard that both refined and natural sugars can have a negative impact in the body. Is it safe to ...
16
votes
1answer
396 views

Does the *frequency* of loud sounds one is exposed to affect Tinnitus risk?

I currently am trying to understand Tinnitus and am having issues with it, because I can't find an official source to see exactly what sort of sound frequency, if heard too often would cause the ...
16
votes
1answer
15k views

Why does it hurt to accidentally gulp air while drinking water?

Sometimes when I'm chugging water, I accidentally swallow a big gulp of air. It's extremely painful. As I understand it, water is less compressible than air and people inadvertently swallow air ...
16
votes
2answers
787 views

Can sleeping on the floor improve sleep quality?

I read many essays about ways to improve sleep quality. One of these essays was about the benefits of sleeping on the floor. At first I found it a ridiculous idea that this would help me get deep ...
16
votes
2answers
72k views

How much food is necessary to buffer the stomach when taking medicine?

Very often, doctors or pharmacists will advise patients to take certain pills with food to "act as a buffer" so the patient is less likely to get a stomach ache from taking the pill. How much food is ...
15
votes
4answers
275 views

Can the immune system break down anything?

Every time one takes a pill, drinks a glass of wine, or uses an illicit drug, it is understood that the effects are temporary. Caffeine only keeps one awake for a few hours, alcohol only intoxicates ...
15
votes
3answers
241 views

When to stretch as a sportsman

I've been hearing lots of contradictory message about stretching in relation to sports. Some says that it's no use to stretch muscle before practicing physical activities while others always do it. ...
15
votes
1answer
269 views

What is the healthiest way to drink alcohol excessively and chronically?

If someone who is otherwise healthy decided to drink fairly heavily and consistently over a long period of time, what is the healthiest way to do so? Example: Stay extra hydrated by drinking more ...
15
votes
3answers
1k views

Can wearing eyeglasses cause your eyesight to degrade further?

I've been told that wearing eyeglasses to correct poor vision can cause your vision to degrade even further. In other words, "Hold off wearing glasses for as long as possible, because once you start, ...
15
votes
2answers
1k views

Does 3500 calories really equal a pound?

If you are attempting to lose weight via dieting and/or exercise, you will see this number EVERYWHERE on the internet. If you create a deficit of 3500 calories you will lose one pound, as simple as ...
15
votes
1answer
389 views

How exactly can/do antidepressants treat ADHD?

According to Wikipedia, antidepressants can treat ADHD, not just depression. How exactly? So far I know, ADHD is caused partly (primarily?) by a dopamine deficiency. Do antidepressants do something ...
15
votes
1answer
856 views

How often is it safe to get general anaesthetic?

There's an eye surgeon in my running club and I told him I had general anaesthetic three times. He told me that's a lot. I've heard of people thinking general anaesthetic is bad, is there any ...
15
votes
3answers
1k views

Is breathing into a paper bag an effective treatment for panic attacks?

Some sources claim that breathing into a paper bag is a good way to control hyperventilation caused by a panic attack. The theory (I surmise) is that re-breathing CO2 helps to mitigate the respiratory ...

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