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1answer
147 views

What is this white stuff inside apples?

I live at Vancouver, BC, Canada and very often find this kind of white stuff in the apples I buy I used to live in Europe (Switzerland) and never saw that before. It very much look like a fungus. ...
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0answers
12 views

Is salivation decrease during sleep beneficial?

Papers [1, 2, 3] tell that a salivation decrease is not only unpleasant, but harmful for dental health. What cause that decrease? What is the reason for it and do animals have it? I guess it's a ...
2
votes
2answers
95 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 ...
1
vote
1answer
35 views

Creation of healthy genetically modified crops [closed]

GM crops are huge at the moment, and the noticeable 'counter movement' is for people to continue to purchase organic foods (please note I am specifically talking of GM crops and not meats, etc). The ...
3
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0answers
40 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
11 views

how to see prefrontal cortex works normally by a test?

Is there a test to see if the Prefrontal cortex of someone works normally? especially a simple test like a questionnaire that you give the individuals to fill out and based on their answer you obtain ...
0
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1answer
23 views

Influence of artificial sunlight on the human body

In a hypothetical scenario, where a large, permanently manned craft is in a continual orbit, and natural sunlight cannot be used as the craft may keep moving and turning, artificial sunlight is used ...
4
votes
1answer
80 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, ...
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1answer
94 views

Is it possible to consciously increase or decrease your own heart beat? [closed]

By doing yoga, can we manipulate our own heart beat? Is that possible for humans?
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0answers
38 views

Is it worth to experiment with pro-biotics at home?

Let's assume that Joe has done some investigation on Internet and wants to see, if pro-biotics would help him. Now he goes to amazon.com and buys a pro-biotic product with excellent average rating. ...
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0answers
41 views

Why humans have different generics in physiognomy, features and countenance worldwide? [closed]

I often wonder why people of world have different features. they have different types of skins, colors, heights, eyes etc. Some of i observe are. Breed? a child adopts his physical body part's ...
1
vote
1answer
130 views

If all bacteria in human gut are dead, can they be there again?

If someone likes to eat chocolate, she may have gut bacteria which like chocolate according to some articles that I have read. http://www.theatlantic.com/health/archive/2014/08/your-gut-bacteria-want-...
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0answers
41 views

How Can We Catch A Cold? [closed]

I always catch a cold in winter, sometimes in summer. So I was wondering why do people catch a cold mainly in the winter, not in the summer? What could cause this?
3
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0answers
494 views

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 ...
2
votes
1answer
22 views

To have a drug travel to a specific place in the body can you just coat the drug in extracellular signals recognized by target cells?

In a lecture of mine the professor was talking about the issue faced in regards to drug therapy when it comes to targeting lung cells in cystic fibrosis. It was said that if unless the drug gets ...
0
votes
1answer
71 views

What if there are no bacteria such as Streptococcus mutans

If someone removed all bacteria such Streptococcus mutans in her mouth by starving long time, or by some chemical method, would she never have such bacteria? In my thought, because S.mutans only ...
3
votes
0answers
56 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 ...
0
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0answers
30 views

Consumption of different type of energy when one is inactive

I'm wonder if there is any study done on this and what are the results? how much of each type of energy one's body(healthy normal person) uses when inactive(seating down) I know there are alot of ...
3
votes
1answer
35 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 ...
4
votes
1answer
289 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 ...
3
votes
1answer
159 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 ...
0
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0answers
25 views

What is a significant drop in blood pressure?

I have done a (high school) science experiment to try to study the affects of holding a rabbit on blood pressure and heart rate and found systolic blood pressure dropped an average of 9.2% and ...
0
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0answers
61 views

Are vegetables really needed in our diet?

I want to believe that eating vegetables is necessary even when one takes vitamins, but I can't find any medical evidence for this. To make my question specific, suppose a study on twins were done in ...
9
votes
1answer
169 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 ...
2
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4answers
569 views

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 some similar phrase) reveals a lot of information which ...
7
votes
2answers
6k 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 ...
2
votes
1answer
1k 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 ...
3
votes
3answers
150 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)?
6
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2answers
103 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?
2
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2answers
112 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 ...
1
vote
0answers
89 views

Does Smartphone cause ear pain? [closed]

I used samsung galaxy y for last two years. I used to speak more than 3 hours per day in the phone. Now if i bring any smart phones near to my ear, i can't bear the pain. I have little cold and 4 ...
6
votes
1answer
261 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 ...
0
votes
1answer
147 views

What shows how healthy someone is by their heart rate? [closed]

What shows how healthy someone is by their heart rate - how low it is at resting pulse or how low it is during exercise or how large the difference is between the resting rate and rate with load? Any ...
0
votes
0answers
56 views

Is the molecule nitric oxide responsible for healing blood vessels?

Is the molecule nitric oxide responsible for healing blood vessels? How does nitric oxide heal the blood vessels? I watched a documentary about the healing effects of nitric oxide. In the video I ...
4
votes
1answer
179 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 ...
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0answers
53 views

Cigarette consumption dose-response function WRT health outcomes

I'm curious how health risks (mortality, lifetime probability of cancer, etc) change with cigarette consumption. Specifically, treatring cigarette consumption like a continuous variable, rather than ...
1
vote
1answer
163 views

Does physical exercise following lack of sleep increase the risk of sudden cardiac death (SCD)?

Is there any scientific evidence supporting the hypothesis that physical exercise following lack of sleep increases the risk of sudden cardiac death (SCD)? The only relevant research I could find is: ...
1
vote
1answer
215 views

Crude oil contamination hazard

I'm not sure if this is physics, biology or chemistry related so I will start here. I'm from a city (Baku, Azerbaijan) where crude oil is known to be extracted since ancient times. Oil is no longer ...
4
votes
1answer
134 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
votes
1answer
29 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?
3
votes
1answer
71 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?
6
votes
1answer
243 views

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 ...
20
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3answers
2k views

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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0answers
58 views

Will breathing through mouth result in any disorders? [closed]

My nose is slightly bent. When I was born, I had an issue with breathing. My mom said that doctors had inserted a breathing tube in one of my nostrils. This tube may have caused the deformation. From ...
2
votes
1answer
175 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 ...
3
votes
1answer
125 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, ...
1
vote
0answers
29 views

Prenatal hyperkinetic dysfunction and its effect on endurace

Do people with an hyperkinetic dysfuntion have a better endurance? Are they fitter in cause of their Dopamine-overdose or any other reason? I have a case, where someone does not do any sports, but ...
2
votes
2answers
198 views

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 ...
7
votes
1answer
3k 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?
3
votes
2answers
191 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 ...