Skip to main content
131 votes
Accepted

Is there plastic microfiber in 83% of tap water?

The study by Orb Media was subject for articles in German news website Spiegel Online (commercial) and WDR (public service broadcasting). Both articles, quoting staff from the German Federal ...
DevSolar's user avatar
  • 19k
94 votes
Accepted

Did the Covid vaccines lower fertility rates via causing infertility?

JD Rucker claims that a falling birth rate is the result of reproductive damage caused by Covid-19 vaccines. However he does not say if he means all the vaccines or just some of them: none are ...
Weather Vane's user avatar
  • 7,670
56 votes
Accepted

Are Unvaccinated Children Healthier?

Summary: The survey this article was based on was biased, poorly designed and poorly implemented. The conclusions cannot be trusted. This study was examined by Orac who has been "checking in ...
Oddthinking's user avatar
  • 144k
51 votes

Does 5G pose health risks?

I would say this is Not True Just going by the sentence you’ve highlighted: Health experts believe this increased exposure to 5G will have a devastating impact on our health. It’s already ...
TheWanderer's user avatar
34 votes

Does staying indoors protect you from wildfire smoke?

Yes, for some time. Your home acts as gas-reservoir for a time. International Energy Agency’s information centre on energy efficient ventilation. writes Summary Evacuation of people from their homes ...
pinegulf's user avatar
  • 6,572
25 votes
Accepted

Does Flint have a much lower rate of lead poisoning than it had two decades ago?

His data are approximately correct. He gives all the sources and assumptions at the bottom of the article as well as a spread sheet with all the data. Compare his data to Preliminary state data shows ...
DavePhD's user avatar
  • 107k
24 votes
Accepted

Does Vitamin D created by sun exposure get washed off in the shower?

Breakdown of the claims There are a couple of claims contained together in this question. Vitamin D is formed on the skin (as well as in). Relatively large amounts remain on the skin or are secreted ...
LangLаngС's user avatar
  • 44.1k
23 votes
Accepted

Are US sunscreens less effective due to FDA regulations?

Do FDA regulations make US sunscreens less effective than international products? Unlike the EU, FDA regulations do not dictate standards or minimum requirements for UVA protection in sunscreen. Also ...
Barry Harrison's user avatar
22 votes
Accepted

Are activities in which both people bleed on each other considered "No Risk" for the transmission of HIV?

Regarding the claim that scratching is a "No Risk" activity, here is a study showing no HIV transmission from scratches and bites from a person with contaminated fingers and mouth: To examine the ...
tim's user avatar
  • 52k
18 votes
Accepted

Is the EPA's regulation of particulate matter justified with evidence?

It is justified with (recent) evidence. Selectively quoting from WP:Pariculates#Health_problems, emphasis of publication dates mine: Inhalation of PM2.5 – PM10 is associated with elevated risk of ...
DevSolar's user avatar
  • 19k
18 votes
Accepted

Does drinking cattle urine have health benefits?

This is a religiously motivated idea. And it is very probably a quite terrible idea from a health perspective. It is definitively a terrible idea from a taste perspective. After reviewing the ...
LangLаngС's user avatar
  • 44.1k
16 votes

Is food becoming less nutritious because of depletion of soil minerals and nutrients?

Avery gave you a list of "yeses" by moving the goal posts to an issue of organics vs non-organic modern agriculture. Here's a peer-review no to the actual question of historical decline: ...
against very long user names's user avatar
15 votes

Is the EPA's regulation of particulate matter justified with evidence?

I am submitting a new answer because I believe there is a gap in understanding in how these regulations work. I will try to be brief, yet thorough. EPA regulates Particulate Matter, or PM, under the ...
Microscone's user avatar
15 votes

Did the Covid vaccines lower fertility rates via causing infertility?

Fertility Rate: [The] average number of children born to women during their reproductive years. — Fertility rate | Britannica The fertility rate of a population is affected by individual choice (...
Ray Butterworth's user avatar
14 votes

Does a dairy-free diet reduce autistic behaviour?

There is little evidence to support the effectiveness of nutritional supplements or the GFCF diet for improving ASD symptoms. A dairy-free, gluten-free diet for autistic kids is called GFCF (Gluten-...
Avery's user avatar
  • 46.3k
14 votes

Is the European NO₂ limit of 40 µg/m³ for outside air backed by strong evidence?

Summary The question as asked in the title depends on what you consider "strong evidence". I will therefore have a look at which side makes the better-sourced point. (Which is not just about "...
DevSolar's user avatar
  • 19k
13 votes
Accepted

Do we unknowingly eat 5 grams of plastic per week?

I think this is rather disputed. The 5g figure appears to have originated with Reuters Singapore based on an Australian study, and it's even pegged as a "conservatives estimate" therein. On ...
against very long user names's user avatar
12 votes

Is there plastic microfiber in 83% of tap water?

No. Of course there exist locations in the world where microplastic will be found in the water -- given the standards in some parts of the world, this cannot be doubted -- but overall the claims are ...
Damon's user avatar
  • 432
11 votes
Accepted

Does the Dakota Access Pipeline (DAPL) meaningfully increase the risk of water contamination?

Is the existing Northern Border Pipeline (which is natural gas as opposed to DAPL's crude oil) a comparable environmental hazard, or is DAPL provably more risky? Natural gas and crude oil spills ...
Batman's user avatar
  • 1,074
10 votes

Does residential radon cause lung cancer?

Key assertions here are, at best, out of date. According to a 1997 study: Until ongoing case-control studies of indoor radon are completed and the data are pooled and analyzed, the studies of ...
Brian Z's user avatar
  • 7,500
10 votes

Is the illegal nuclear waste at the Coldwater Creek Nuclear Landfill a risk to public health?

The Claim I'm challenging: this article claims that an "expert" says it's fine. Sasa Mutic is a PhD in radiooncology and the chair of the radiation safety committee at Washington School of ...
eyeballfrog's user avatar
10 votes

Does using BlueTooth devices cause leakage of the blood-brain barrier?

No, it seems that low power electromagnetic fields(such as from BlueTooth devices) do not cause any significant increase in the permeability of the blood-brain barrier. Research regarding effects the ...
Giter's user avatar
  • 11.6k
9 votes
Accepted

Is San Francisco's Chinatown contaminated with mercury from a 1901 "disinfection program"?

In a 17 block area, 16,888 rooms of 1,185 buildings had their walls and ceilings sprayed with a 1:800 solution of mercury bichloride. Source: The Journal of the California Senate, 06 January 1903, at ...
DavePhD's user avatar
  • 107k
8 votes

Does grounding (earthing) reduce inflammation?

The article is published by Dove Medical Press, which offers open access journals on an "author pays" model. The NIH URL seems to be merely the National Library of Medicine medical article indexing ...
Paul Johnson's user avatar
  • 16.6k
8 votes
Accepted

Does using a fluoride-based toothpaste or fluoride-supplemented tap water lead to higher fluoride concentration in the pineal gland?

There is significant discussion of this issue in Fluoride in Drinking Water: Scientific Review of EPA's Standards (2006), particularly in chapter 8, Effects on the Endocrine System. This book is a ...
DavePhD's user avatar
  • 107k
8 votes

Do beeswax candles "purify" the air?

The study "Fine Particulate Matter Emissions from Candles" (viewable online) compared various candles. It found that the beeswax candle (called BW1 in the paper) emitted less PM2.5 (often ...
piojo's user avatar
  • 184
7 votes

Is Giardiasis a significant risk of drinking untreated water in pristine backcountry areas in North America?

Is there any proven risk (i.e. shown to be significant) of contracting giardiasis due to drinking unfiltered backcountry water in pristine areas in North America? Giardia is considered ubiquitous. "[...
Buck Nelson's user avatar
7 votes

Does washing your hair with a coal-tar soap prevent hair loss and accommodate hair growth?

In its essence this is true. Therapeutic doses of coal tar – or Liquor carbonis detergens – are used and effective against overproducing sebum, dandruff and a range of other problems with hair. Its ...
LangLаngС's user avatar
  • 44.1k
7 votes

Does dry air promote the spreading of respiratory viruses better than wet air, ceteris paribus?

This is a rather tentative answer since the evidence still looks fairly contradictory to me, but the BBC has an article that reiterates what DW says, with more detail: Thanks to the laws of ...
against very long user names's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible