15

tl;dr Current research seems to indicate that the brain is responding to anticipation or visual stimulus of needles being inserted, not that any of the theories supporting acupuncture are correct. Steven Novella reviewed the following article: Chae Y, Lee IS, Jung WM, Park K, Park HJ, Wallraven C. Psychophysical and neurophysiological responses to ...


6

Neither. The percentages given are the percentage of couples using that method who will conceive over a year. So if 100 people use that 98% method, 2 will get pregnant each year. Here is a page from the National Health Service in the UK that explains this as well as providing some numbers for some methods.


5

Zinc oxide is an inorganic compound with the formula ZnO. ZnO is a white powder that is insoluble in water and is widely used as an additive in numerous materials and products including rubbers, plastics, ceramics, glass, cement, lubricants, foods, and as a sunblock. For material science applications, zinc oxide has a high refractive index, high thermal ...


4

It seems to be unclear and likely some kind of combination of several factors. The paper Fecal microbiota transplantation in relapsing Clostridium difficile infection mentions two theories as to why it works (and works very well): The introduction of bacteria able to compete with C. difficile rebalances the fecal microbiota - under normal circumstances, ...


4

Retainers prevent the teeth from reverting to their original position, and therefore progressively force the periodontal ligament (PDL) to adapt itself to the new position. Doing a Fiberotomy accelerated the process by detaching the fibers of the PDL that are still trying to hold and/or bring back the tooth in the previous position. This does not negate the ...


4

Magnesium, zinc and melatonin help to manage and control the sleep problems. These three natural components have their own mechanisms in managing the sleep disorders. Firstly, talking about Melatonin: Disturbances in the rhythm and amplitude of melatonin secretion may account for symptomatic disturbances to sleep and mood. Melatonin treatment not only ...


4

Here's an paper that might help you: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3554027/ The short conclusion is "Application of the scapular brace improved shoulder posture and scapular muscle activity, but EMG changes were highly variable. Use of a scapular brace might improve shoulder posture and muscle activity in overhead athletes with poor ...


3

Yes. The effect of reclined seats on mortality in motor vehicle collisions. The reclined position is associated with increased occupant mortality in motor vehicle collisions. Why? flexion and compression injuries over pretensioned lap and shoulder belts resulted in severe thoracoabdominal and spine injuries in restrained occupants, with a high ...


3

TL;DR: No, sunscreen needs to be re-applied every 2 hours Your product is the same as SPF 30 sunscreen SPF is a measure of how much solar energy (UV radiation) is required to produce sunburn on protected skin (i.e., in the presence of sunscreen) relative to the amount of solar energy required to produce sunburn on unprotected skin. As the SPF value ...


3

Since 'the cure' or rather a vaccine against the virus is still only on the horizon, affected populations have to resort to prevention measures and supportive care, once the infection breaks out. Even with a vaccine, mosquito population control and bite prevention will be necessary to control chikungunya disease. Chikungunya at the Door — Déjà Vu All Over ...


3

Is dental floss really effective? The evidence shows that we don't know. Here the main issue is the lack of good evidence. How we find how effective is? Simple: we took a group of people with similar age, similar dental status, and divide randomly to one group who will use floss and other who don't. Then, we wait for one, two or five years and compare ...


3

No one likes CVS, and computer glasses are said to increase contrast and decrease glare to alleviate eye stress. If you are sure you will be using the computer in the future for prolonged periods and have considerable discomfort, it will be worth the investment for eye strain relief and ultimately less magnification.


3

Acupuncture is often used to treat pain conditions such as headache, lower back and osteoarthritis. It is based on scientific evidence that treatment can stimulate nerves under the skin and in muscle tissue and as result body is producing pain-relieving substances (such as endorphins)NHS. NICE recommends acupuncture only as a treatment option for chronic ...


3

This type of phenomenon will almost always be seen with drugs that target foreign pathogens capable of change, i.e., bacteria, viruses, fungi, parasites, etc. In addition to antibiotics, which target bacteria, antiviral and antifungal medications can also decrease in effectiveness overtime as the pathogens develop resistance mechanisms. For instance, HIV ...


2

Breathing into a paper bag to control hyperventilation might improve hypocarbia, but should NOT be done because of the risks of hypoxia and death. This case report shows that breathing into a paper bag during hyperventilation can reduce partial pressure of oxygen by up to 42 mmHg (normal 80-100mmHg) and can result in death. As answered by @arkiaamu, a better ...


2

I did not find any studies which would investigate that matter. Moreover, in 2008 Nillni and co-workers (1) stated: Surprisingly, although the expressed goal of breathing training is to correct hyperventilation, pCO2 has never been used as an outcome measure In a recent study (2) it was concluded: Clinical improvement must have depended on elements ...


2

Hot fluids(including water) can: Relieve Nasal Congestion Prevent Dehydration Soothe Uncomfortably inflamed membranes that line the nose and throat By relieving symptoms you can make a person feel as if they are well or getting better. So yes I would say it helps. So just the hotness of the fluid can be a benefit. From a study: “The hot drink provided ...


2

First, it is important to realize that there are two main types of ginseng in wide use: Asian ginseng and American ginseng. The Memorial Sloan Kettering Cancer Center has information on both types. Uses of Asian Ginseng Treating angina, a form of chest pain Treating diabetes Treating HIV/AIDS Stimulate the immune system Treating sexual dysfunction ...


2

Effervescent pills have the advantage that since you ingest the active compount already dissolved the absorption rate is generally faster than for normal pills. This is useful when you need the drug to kick in as soon as possible, like medicines for pain or fever. In the case of vitamin C, I see little to no reason why you would need such a fast action, so I ...


2

Ferritin levels of 21 ug/L are on the extreme lower edge of the normal range. You can think about iron stores as follows. A healthy person will have iron stores of a few grams. Since iron is present in every cell of the body, we lose iron via the loss of dead skin cells, mucus, sweat etc. etc. The iron in red blood cells is recycled when they die, so we don'...


2

TL;DR The pill slightly more effective than condom for contraception. Other methods are better still. The pill is ineffective for preventing STI; condoms are mostly effective. In Full First things first. Statistics on contraception efficacy are widely available, so as a bonus you are getting info on several more types than just 'condom' and 'pill'. How ...


2

Albuterol is a short-duration ß2-receptor agonist (to which it owes its main effect, bronchodilation); and while it can produce some effect on ß1-receptors (producing effects such as tachycardia), these will still be short-lived due to the short-acting nature of the drug itself. More reliable exercise-induced asthma information here: http://www.uptodate....


2

The only effective management of viruses is by vaccination. In this way diseases such as measles have been eradicated from some countries. Currently there is no vaccine available so ecological measures such as controlling the mosquito vector need to be employed. Vaccines are under development eg. http://www.nature.com/nm/journal/v23/n2/full/nm.4253.html


2

Salvia is a herbal treatment with a long tradition for this indication. sage leaves The HMPC has classified sage leaves as a traditional herbal medicinal product. ESCOP: internally for increased secretion of sweat; externally for inflammation of the mucous membrane of the mouth and throat, gum inflammation. Commission E: internally for dyspeptic ...


1

To first establish a baseline: Reading is great for your brain, your mind, your intellect. But it can be bad for everything else. You sit, you concentrate, you stress your eyes. It is such a common causal connection that the NHS simplifies the analysis of causes for myopia down to genes and: Short-sightedness (myopia) usually occurs when the eyes grow ...


1

According to the World Health Organization Administering the vaccine up to 3-5 days after exposure has been shown to reduce the severity of the disease significantly, but studies vary greatly as to whether or not post-exposure vaccination can prevent the disease entirely. Post-exposure treatment with antiviral drugs is effective at reducing the severity of ...


1

I think that you can order masks online for that purpose. The main thing is that the mask should not allow the allergens to reach your respiratory tract (also the eyes should be protected if you have eye problems because of the allergy). Because the allergens are physically larger than the usual environmental pollutants, masks that block environmentall ...


1

Foods that may reduce Gynocamastia: Livestrong: there's no association between any food and breast enlargement in men, and no special food you need to eat or avoid when you have the condition. That said you can try food that are anti-inflammatory dor tenderness, low calorie to decrease total body fat, and avoiding foods that may encourage it. Low ...


1

According to eye care providers, computer glasses designed for digital screens which can help alleviate many of the factors which cause eye strain symptoms, although do not completely prevent it. For example they may help the eye to adjust to intermediate-distance objects such as computer screens. There are some with an antireflective coating which may help ...


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