Do Salt Lamps Work?

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Published 2019-02-06
Do negative air ions improve mood, anxiety, depression, alertness?
Part of this video was sponsored by LastPass, click here to find out more: bit.ly/2RZZTZk

Special thanks to Prof. Jack Beauchamp and Dr. Nathan Dalleska from Caltech for all their help running these experiments and discussing the research. For more, check out the links below:
www.cce.caltech.edu/people/jesse-l-jack-beauchamp
beckmaninstitute.caltech.edu/eac.shtml

If you want to dig into the research on negative ions yourself, I suggest starting with the review studies:

Air ions and mood outcomes: a review and meta-analysis.
Perez V, Alexander DD, Bailey WH.
BMC Psychiatry. 2013 Jan 15;13:29.
www.ncbi.nlm.nih.gov/pubmed/23320516

Air ions and respiratory function outcomes: a comprehensive review
Dominik D Alexander, William H Bailey, Vanessa Perez, Meghan E Mitchell, and Steave Su
J Negat Results Biomed. 2013; 12: 14.
www.ncbi.nlm.nih.gov/pmc/articles/PMC3848581/

Exposure of laboratory animals to small air ions: a systematic review of biological and behavioral studies.
Bailey WH, Williams AL, Leonhard MJ.
Biomed Eng Online. 2018 Jun 5; 17(1):72.
www.ncbi.nlm.nih.gov/pubmed/29866122

Thumbnail photography by Raquel Nuno

VFX by Alan Chamberlain

Sound recording by Whitney Clavin

Motion Graphics by Charlie Kilman

Music from Epidemic Sound: epidemicsound.com/ "Capture a Picture 1" and "Seaweed"

All Comments (21)
  • If the lamp turns on, then the salt lamp technically works. Checkmate Veritasium.
  • @alfepalfe
    Never knew those lamps were supposed to produce ions I thought they were just a cool decoration item.
  • @20cnVision
    The thing with the thunderstorms, oceans and beaches is that they are already quite exciting on their own - so it's normal to feel different/better when experiencing them.
  • 8:51 "So, your conclusion is that it's not producing any negative ions?" "We certainly aren't able to detect any ions." I love his response. It's such a humble, carefully worded, and scientific response. He doesn't say definitively that the salt lamp is not producing ions, just that they simply are not detecting any ions from the salt lamp. It is a subtle but important distinction, and a great example of how easy it is to develop hubris from literally anything if you're not paying attention to yourself. The scientific community ⁠— no, the world needs more of this.
  • @colehanna4040
    The fact that you made this whole video without saying the word 'placebo' is impressive
  • @jsd05
    I love how humble that man was, didn’t want to say he’s an expert after a mere 55 years of study. Contrary to the guy selling the salt lamp, he had all the answers with zero knowledge.
  • My salt lamp totally works! I had a severe lack of glowing rocks and now I have a pretty one to fill the void
  • @leggyReid4c
    I just love how the scientist are so open-ended with their responses. None of them said absolutely not to any experiment. They all said stuff like " i believe or, or it appears to be that way".
  • I like how the professors were not jumping to conclusions, they just spoke within the boundaries of the results they are seeing
  • @huckthatdish
    when i saw the title, i had no idea salt lamps were supposed to be anything other than aesthetic lamps, so I was like of course they work. They produce light and look nice.
  • @owls6514
    I like when people make thumbnails like this. It answers the question and makes you go like: well why doesn’t it work? And then you have to watch the video to find out why. This is a much better strategy than click bait
  • I think another important thing to point out about the ion "tests" is that doing these tests in things like office settings is a great way, experimentally-speaking, to get a positive result without knowing if you've identified the correct cause. Sure, people probably do notice an improvement in mood and general behavior when an ionizing air purifier is put into the room, but that doesn't just change the ion content of the room. I could very easily imagine introducing an air purifier to an office that previously didn't have one would improve air quality in general and improve air flow in a room that's probably rather stuffy otherwise. Sure, it could be the ions... but it could also be a lot of other things.
  • @itsBlueshift
    Veritasium: the only channel that poses a question, answers it in the thumbnail, yet I still feel compelled to watch the 16 minute video
  • @jamesabbott6425
    I adore how when Derek asks "are you an ion expert" the answer isn't yes or no. It's "here is my level of experience in the field." which gives you a way better idea of why you should listen than just "yes i am"
  • I bought the salt lamp because it looks cool. Didn't know people actually thought they made you happier or something lol
  • My entire life I got bad grades in school. Geography was the exception because of the passion I had for Nature... So it was easy to learn something I intuitively understood. But... YOU have made learning any subject a want to do, not a have to do... I am so grateful for the scientific learning you provide on Veritasium! I wish people like you ran schools across the planet. We wouldn't be in this divided world if education was performed correctly... Thank You!
  • @presleypresleyj
    This video was a roller coaster. I wasn't a believer, then I was a believer, and now I'm not again.
  • @JR-ue2cx
    I cant stop thinking about how the only reason he made this video was to tell his friend he is wrong.
  • @draekon8995
    Great video. I’d love to see one on the concept of “Earthing” (connecting yourself to the ground) and maybe one about EMF radiation.
  • @theesynopsis7412
    i suffer from depression and was naturally gravitating toward the beach and outdoor living. after watching your production, i now understand my love of beaches and constant desire to go to the beach. i also have an aversion to artificial air. thank-you for your work.