Questions tagged [health]

Health and medicine questions are off-topic unless dealing with the biology underlying health and medicine. Please carefully explore the tour, help centre, and meta before posting health and medicine questions. Health is a physiological state of well-being referring to the (ab)normality of the cellular or organismal physiology.

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37
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5answers
7k views

Can bacteria be killed by purely physical trauma?

In a question over on Skeptics Stack Exchange, I half-jokingly listed "blunt force trauma" as a means by which a bacterium could be killed. That makes me wonder if it really is only a joke ...
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1answer
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What are the side-effects of long-term liquid breathing?

I just saw a recent Physics question that mentioned liquid breathing (which I had never heard of before) and I started to wonder about its long-term effects. Let's imagine a person underwent liquid ...
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Why is high fructose corn syrup unhealthy?

I understand that high fructose corn syrup was found to have detrimental effects on peoples' health. Why is this so?
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3answers
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Why do hot water baths affect only males' fertility? Why not females'?

Here is the link where urologists are warning men not to take hot water baths. Why does it affect only males' fertility? Why not females also?
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2answers
410 views

What are the survival limitations of alcohol?

This question was inspired by watching one of the Pirates of the Caribbean movies; particularly where Jack Sparrow allegedly survives on a desert island by finding an unlimited supply of rum. I've ...
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2answers
6k views

What kinds of bacteria live in water bottles?

I've always heard not to re-use disposable plastic water bottles. According to this Huffington Post article, the reason is because: everyday wear and tear from repeated washings and reuse can ...
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2answers
47k views

Does freezing microorganisms such as probiotics kill them?

Does freezing microorganisms such as probiotics kill them? If not, what is the process that allows them to "come back to life" after the temperatures are increased? As an example, lets say you ...
10
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1answer
15k views

Why do Bee stings cause swelling?

Why is it that when a bee stings, a little area around it gets swelled? I think it is some sort of defense mechanism of the body. But how does it help?
10
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1answer
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What's the technical difference between fainting (and being unconscious) and falling asleep (and sleeping)?

This is actually a popular question along google results but the answers usually sound like: sleep is voluntary (oh is it?) and healthy fainting is result of accident and is not normal I read those ...
8
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1answer
4k views

Is palmitic acid really that dangerous?

According to Wikipedia, "Palmitic acid is the most common saturated fatty acid found in animals, plants and microorganisms. It is also the first fatty acid produced during fatty acid synthesis and is ...
8
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1answer
41k views

What is this white stuff inside apples?

I live at Vancouver, BC, Canada and I often find this kind of white stuff inside the apples I buy I used to live in Europe (Switzerland) and never saw that before. It very much look like a fungus. Is ...
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1answer
285 views

Does urine therapy really work?

I heard a lecture from a supporter of urine therapy and he claimed that urine is not only good disinfection but also as rich source of minerals. To me, these two advice seemed contradictory. In ...
7
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1answer
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Why does fever above 102 herald a cancer patient's death?

I was recently intrigued by a longtime hospice nurse's observation that her cancer patients die a different death than her Alzheimer's, multiple sclerosis, heart failure and COPD patients. She stated ...
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1answer
333 views

Is bad tasting food more likely to cause harm?

Taste is often referred to as subjective. For example certain foods taste bad to me, such as oranges, grapefruit, grapes, raisins, and sweet potatoes. However the wiki article on taste explains that ...
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1answer
313 views

Why do obese people heal more slowly?

I recall an obese patient who was referred to a transplant clinic as his stitch wounds hadn't healed after a year. While there's a myriad of side effects caused by immunosuppressive medication after ...
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190 views

What level of cellular radiation is harmful for humans?

What level of radiation at the frequencies used by the cellular network(1-2 Ghz) is harmful for human health?
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1answer
334 views

Why are particular laser-related skin products not recommended for darker skin tones?

This is about products such as: The "Theradome" laser helmet (this claims to stimulate hair growth through lasers) Theradome™, a biomedical engineering company based in the Silicon Valley, is the ...
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1answer
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iodine: how did they manage without it in old ages? (People who were living far from the sea)

Knowing that today iodine comes either from fish products or (artificially) enriched table salt, how did people who lived far from the sea survive before (especially during the the Middle Ages)? Edit ...
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1answer
79 views

What is mold detection threshold in humans?

I managed to find primary taste detection thresholds, e.g. for sweetness it's 1 part in 200 of sucrose in solution. Recently I've noticed that I can detect mold smell/taste even if there are no signs ...
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1answer
3k views

How dirty are bugs? And is it okay if they touch food?

Sometimes I see people throw out an entire drink or bowl of food because a small bug was in it. Are they justified in doing this? Is there enough bacteria on common species of bugs (like ants, flies, ...
5
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1answer
121 views

How do you go from virus infection to disease?

I heard on the radio a few days ago1 a discussion on viruses and diseases (go figure why :)). The guest was very precise in how the virus enters a cell, how its RNA merges with the cell's one and how ...
5
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1answer
1k views

What are the most important factors influencing a person’s gut microbes?

You are your bacteria! The probiotics and the antibiotics... There has been on going discussions about how our gut bacteria is important for a healthy lifestyle. Figure 1: Schematic diagram ...
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1answer
91 views

Ultra Pasteurization and Pasteurization

What is the effect of pasteurization and ultra-pasteurization on proteins, enzymes, and nutrients found in milk and other dairy products?
5
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1answer
375 views

Why do children prefer sweeter foods?

As we get older, we tend to lose our sweet tooth and become more tolerant to bitter foods, like vegetables. However, I never understood how this works. Why is it that children prefer sweeter foods, ...
4
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1answer
989 views

Why do humans lose subcutaneous fat tissue with age?

Why exactly do humans lose subcutaneous fat tissue with age? It appears that we either lose fat cell volume or we might actually be losing the number of fat cells with age. One hypothesis is that as ...
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1answer
141 views

Can chitosan affect the absorption of unsaturated fatty acid?

I know chitosan will decrease the absorption of fat. However unsaturated fatty acid, such as DHA, is beneficial. Does chitosan effect the absorption of unsaturated fatty acid?
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How different is breathing in wildfire smoke in urban areas compared to sitting by a campfire for a night?

The air quality in the Bay Area is currently the worst in the world, due to the devastating Butte County wildfires. I understand smoke inhalation can cause inflammation and respiratory issues, ...
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2answers
7k views

Wim Hof Method claims Alkaline Blood is Good. Contradictions? Counterproof?

The Wim Hof Method claims, that it is beneficial to have alkaline blood. On the other site there is the medical claim that if the pH-value is not within the range of 7.36 – 7.42, enzyms are ...
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1answer
888 views

Pigmentation in Jaundice

My textbook says that the yellow appearance of a jaundiced person is due to the accumulation of bile pigments in the skin. I am unable to understand why these pigments are not deposited in a healthy ...
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2answers
368 views

Will genetically modified food affect our health?

It's a popular public sentiment that - GM foods like tomatoes (flavr savr) will affect our health.. Is there any logical scientific explanation behind this?
3
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2answers
70 views

Can endometriosis be considered a form of cancer?

In endometriosis the lesions form their own vasculature and compromise organs, arteries, and nerves. It can spread and embed throughout the body. It's difficult to treat as the adhesions resulting ...
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1answer
344 views

What is the best time to exercise

So, after starting to gain weight on sitting in front of my computer too long, I have decided to take the plunge and maybe stick to an exercise regimen. As has been reported by some studies, ...
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3answers
397 views

Can bioluminescence be used for cancer or tumor detection? [closed]

What diagnostic applications, if any, are there in using bioluminescence to detect cancer or tumors (in vivo)?
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2answers
417 views

What's keeping living species from rotting?

Why do only corpses of species rot and be eaten by bacteria? What is keeping us from rotting? Just like fruits, and foods we eat; meat and vegetables rot when left uneaten. Like food, corpses rot and ...
3
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1answer
352 views

Circulating factors affecting human health/longevity

Circulating factors present in young mice have been shown to promote rejuvenation of aged mice, suggesting that tissues have inherent capabilities to regenerate, and circulating factors may be ...
3
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2answers
338 views

Electronic cigarettes (e-cigs), any health risks?

Background: An electronic cigarette (e-cig or e-cigarette) is a battery-powered device which simulates tobacco smoking patented in 1963 by Herbert A. Gilbert. It generally uses a heating element ...
3
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1answer
70 views

Why do we get scars?

Feeling the hardened tissue of a scar on my head I wondered what the purpose of that scarring is, such skin scars are pretty harmless but from what I understand internal scarring can cause major ...
3
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1answer
87 views

Why is it so hard to find the amount of biotin in food? [closed]

According to the WHO publications biotin is a thing we need. Although its non toxic, so you can't get too much. However, excluding a few (small) lists that deal exclusively with biotin content there ...
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0answers
118 views

To what extent are lifestyle factors taken into account in medical testing? [closed]

A glance at any official health bodies advice will show that we are entreated to eat more healthily, take more exercise and reduce stress. Presumably, there is some reasonable evidence that these ...
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0answers
110 views

How to quantify quality of vegetables and fruits?

I am interested in knowing if there have been studies in quantifying the quality of vegetables and fruits. By simple examination, it is possible for us to identify if a particular vegetable is 'spoilt'...
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0answers
119 views

In what way is ADHD genetic? [closed]

According to Psychcentral depression, bipolar disorder, ADHD, schizophrenia and autism are traceable to the same inherited genetic variations According to AsapSCIENCE, depression could be genetic due ...
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5answers
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Why *morning walk*?

My PT teachers professes working-out/training in early morning hours is the best time to do so. A quick search on benefits of morning walk (or similar phrases) reveals a lot of information which seem ...
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1answer
807 views

The heart of a Pigmy Shrew beats 1300 per minute then why is it so fast?

A pygmy shrew is such a small animal. Even with such fast heart beats their average life span is 1.5 years. So can we consider faster heartbeats to not be good for health?
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2answers
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Can someone who is color blind recover color vision by surgical means?

I am currently studying color blindness, and there is no medicine that can help it. Is it possible nonetheless for someone who is color blind to have their eyes restored to normal color vision by ...
2
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1answer
126 views

Is it possible for any impurities to get through the apple peel?

My parents always told me not to eat from the apple trees near the road, because some kind of bad toxic dirt might get through. This sounds to be physically possible but not really probable in my ...
2
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1answer
3k views

Why do humans stop growing? [closed]

Humans grow most quickly when young, and to a lesser extent in preadolescence and early adolescence. However an equilibrium is then reached in adulthood, typically at around 1.6/1.7 meters tall. I ...
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2answers
8k views

What causes people to feel sleepy due to recycled air?

I notice this the most in cars, when I set the air con to recycling air (instead of pulling in fresh air). After a while, I start to feel sleepy, and the sleepiness passes almost as soon as I open a ...
2
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1answer
318 views

what is the margarine metabolism in our body?

margarine is commonly used food ingredients that contribute to both inflammation and obesity , but actually I want to know the margarine metabolism in the human body I can find some resources talk ...
2
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1answer
43 views

Can a brain be damaged by overstimulation?

I am wondering what, if any, long term health effects there are from high levels of brain activity. I don't mean cases where a brain is being artificially stimulated, but rather where there is a high ...
2
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1answer
74 views

What are the biological processes of ingesting radioactive particles?

As someone who has basic understanding/education in physics and how radiation works, there is something that is confusing me and which I would like to shed some light on (I posted about this ...