5

Snopes has covered this. In summary, there is no risk to boiling the same water more than once. Nothing about the water changes except the temperature. There could be theoretical risks if you increased the concentration of contaminants in the water (since some of the water is lost as steam, the concentration of anything dissolved increases), however simply ...


4

When you do not get enough nutrients from food, your blood glucose levels tend to fall, which triggers the release of the hormone epinephrine (adrenaline). Epinephrine is transported via the blood to the fat stores anywhere in the body, where it triggers the breakdown of fats (triglycerides) into fatty acids. Fatty acids leave the fat stores, enter the blood ...


4

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 for disease and where vulnerable people are numerous. If facial hair is a reservoir for disease, it might be reasonable to recommend that healthcare staff remain ...


3

NASA has this to say about the effects of eclipses on humans: There is no evidence that eclipses have any physical effect on humans. However, eclipses have always been capable of producing profound psychological effects. For millennia, solar eclipses have been interpreted as portents of doom by virtually every known civilization. These have stimulated ...


3

According to a case report about a 24-year old woman (PubMed Central), in agoraphobia, during a panic attack, the sympathetic nervous system is activated, which results in adrenaline release, which causes symptoms, such as: ...pounding heart, shortness of breath nervousness, dizziness, losing control on himself for few minutes. So, from symptoms ...


3

According to below chart (in which the source from 1986 is also stated) the optimal indoor air humidity for human health is between 40-60%, as close to 50% as possible. The low humidity levels you described (5%) would apparently be optimal for bacteria and viruses and negatively affect allergic rhinitis and asthma. Such low levels of indoor air humidity can ...


2

If you're looking for a disease with childhood onset that requires exercise restriction, Long QT Syndrome (LQTS) may work, specifically LQT1. Here is a lay overview. For more detail, see this review. I'm not a cardiologist, and have never seen a patient with LQTS, so I'm honestly not sure how variable the presentation is. Generally, for LQT1, exercise or ...


2

Macronutrient (carbs, proteins, fats) composition of a diet does not have a significant direct effect on weight loss. Comparison of Weight-Loss Diets with Different Compositions of Fat, Protein, and Carbohydrates (PubMed, 2009, a randomized clinical trial involving 811 overweight adults) Reduced-calorie diets result in clinically meaningful weight loss ...


2

Here's the definition of health according to WHO: Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity. As you can see, there are a lot of components to this term, of which some, like absence of disease, can be objectively assessed in a uniform manner, while others may have criteria that ...


2

Articular cartilage, which covers the ends of bones in all synovial joints is avascular. Without a blood supply it is unable to heal or regenerate. Over time the loss of this cartilage is what causes the condition known as osteoarthritis. The modalities you've listed are indicated for swelling / healing and pain management. So they'll only help with ...


2

A bit speculative as this seems to be, given current attitudes in most societies towards nudity, this would be a somewhat promising scenario. All human infesting lice species are parasites that depend not only on skin contact for nutrition but on certain types of fibres to dwell, to hide, to travel and to procreate. Eradicating this natural habitat on a ...


2

Testicular torsion occurs when the spermatic cord to a testicle twists, cutting off the blood supply (a condition called ischemia). The most common symptom is the rapid onset of acute testicular pain and prolonged testicular torsion will result in the death of the testicle and surrounding tissues (Ogunyemi, et al. 2018). Generally, testicular torsion ...


1

The WHO says between 6.5 and 9.5, but mostly due to the pH's effect on operational water-quality parameters. Between 4 and 10.5, apart from possible irritation the effect on humans may not be severe: EFFECTS ON HUMANS Exposure to extreme pH values results in irritation to the eyes, skin, and mucous membranes. Eye irritation and exacerbation of skin ...


1

It is possible. Voice Disorders are caused by many factors include vocal fatigue which can result from overuse or increases in vocal effort. Vocal effort is a messy thing to define, but it generally depends on subglottal pressure and vocal fold tension (as well as other factors). A change in posture can affect vocal effort and it is possible that it could ...


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