Photodermatol Photoimmunol Photomed May 2015 PMID 25495690

The effect of 222-nm UVC phototesting on healthy volunteer skin: a pilot study.

Julie A Woods, Alan Evans, Paul Donald Forbes, Philip J Coates, June Gardner, Ronan M Valentine, Sally H Ibbotson, James Ferguson, Christopher Fricker, Harry Moseley

Mentions

44
Peak: 13 in Dec 2023
across 4 sources since Jan 2017

Extended reach

108,051
potential audience

Total likes

121

Video views

1,662

Mentions per month

Jan 2017 – Nov 2025

Where it's discussed

  • X / Twitter19 posts
  • Facebook18 posts
  • TikTok5 posts
  • YouTube2 videos

AI synopsis

What people are saying

The discussions reflect a nuanced debate, with some posts emphasizing the potential dangers of 222nm UVC, citing specific findings about skin damage and DNA effects, while others question safety measures and underlying assumptions, as seen in remarks about oxidative stress and filtration techniques. The tone varies from cautious to skeptical, illustrating active engagement with the scientific implications of the research.

AgreementNeither agree nor disagree

Discussions reveal conflicting opinions about the safety of 222-nm UVC, with some agreeing that caution is needed while others question its safety claims.

InterestHigh interest

Participants demonstrate high curiosity, referencing multiple studies, safety concerns, and technical details about the UVC sources.

EngagementModerate engagement

The conversations show moderate engagement with questions about methodology, safety filters, and physiological effects, indicating active consideration.

ImpactModerate impact

The debates about safety standards, potential risks, and differing study conclusions suggest some influence on safety perceptions but not a widespread paradigm shift.

Abstract in brief

  • This study investigated whether a 222nm UVC light, commonly used for sterilization, is safe for human skin by testing its effects on healthy volunteers.
  • Results showed that even at low doses, the 222nm UVC could cause skin redness and DNA damage, specifically in the basal cell layer, suggesting it can harm skin before reaching sterilization levels.
  • While 222nm UVC is promising as a less irritating sterilization method, its potential to cause skin damage highlights the need for careful dose management and safety assessments.

Top posts

Most liked on X and Bluesky
Nukit
@NukitToBeSure · X

In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy volunteer skin: a pilot study https://t.co/JA0G4gZmmy The result: At low doses below the threshold bacteriostatic effect, the source was capable of inducing both https://t.co/Zv7FBkT9RB

Dec 11, 2023 · 78 likes · 14 shares · 7,888 followers View post →
Emily
@the_aiju · X

@judegomila @RajBhakta One paper claims an absorption depth issue, rather than reflectivity, to be the cause. https://t.co/lM28UsCFS4 Seems to contradict the safety on skin (not sure what to make of it)

Mar 7, 2020 · 3 likes · 6,397 followers View post →
AFG(アンファング)
@6yZVjuxQn7n2tWL · X

@FarUV_Sterilray @mas44022884 When comparing Sterilray and Ushio's 222nm UVC, there is clearly a big difference in whether or not it produces erythema. Do you use a band-pass filter to remove the harmful wavelengths? This is all for safety reasons. https://t.co/MxwUjZpZxV

Jan 26, 2021 · 3 likes · 1,685 followers View post →
Aaron Collins
@masknerd · X

@joeyfox85 Interesting given the conclusion of Woods' work was "The source showed an erythemogenic or CPD potential at lower doses than those required to reach the reported threshold bacteriostatic effect." when using the Steril-Ray. Filtered 222nm didn't show that. https://t.co/XwWmqls1NL

Aug 9, 2022 · 2 likes · 49,643 followers View post →
Chris Komatsu
@chris_komatsu · X

@GainOfDystopia @ModelAyshaMirza 222 nm is also not necessarily safe for human exposure. Moreover, the Nature paper you referenced was going by the limit set by American Hygienists and not OSHA or the CDC. Moreover, that paper didn't investigate oxidative stress caused by Ozone at 222 nm https://t.co/sb3oxwfFvu

Sep 10, 2023 · 1 like · 4,215 followers View post →
Jordi
@jotabefe1 · X

12 de Diciembre de 2014 "El efecto de la prueba fotográfica UVC de 222 nm en la piel sana de un voluntario: un estudio piloto" https://t.co/Yyy39ma1gz

Dec 31, 2020 · 1 like · 43 followers View post →

All mentions

Thomas W.
@ThomasWillNot · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 13, 2023 · 14 shares · 752 followers View post →
Rupert wilson
@Oxfordite · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 13, 2023 · 14 shares · 1,665 followers View post →
Dee
@winthrop317 · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 1,003 followers View post →
Sterilray, Inc.
@FarUVSterilray · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 2,481 followers View post →
Scott Squires @scottsquires.bsky.social
@scott_squires · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 15,721 followers View post →
Deb
@Debp197 · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 2,899 followers View post →
@msmaryjodetroit@union.place
@msmaryjodetroit · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 888 followers View post →
The Scritcher
@UnknownOutrider · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 1,454 followers View post →
YO PEEP GAME!
@YDWYPG · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 2,397 followers View post →
Ellen Brockaway
@happyhexer · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 1,208 followers View post →
Elvira
@binamaggio1970 · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 577 followers View post →
Adrian
@SillyPutty78 · X

RT @NukitToBeSure: In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy vo…

Dec 11, 2023 · 14 shares · 4,294 followers View post →
Nukit
@NukitToBeSure · X

In the following study by Woods et al. a Sterilray emitter was used: The effect of 222-nm UVC phototesting on healthy volunteer skin: a pilot study https://t.co/JA0G4gZmmy The result: At low doses below the threshold bacteriostatic effect, the source was capable of inducing both https://t.co/Zv7FBkT9RB

Dec 11, 2023 · 78 likes · 14 shares · 7,888 followers View post →
Chris Komatsu
@chris_komatsu · X

@GainOfDystopia @ModelAyshaMirza 222 nm is also not necessarily safe for human exposure. Moreover, the Nature paper you referenced was going by the limit set by American Hygienists and not OSHA or the CDC. Moreover, that paper didn't investigate oxidative stress caused by Ozone at 222 nm https://t.co/sb3oxwfFvu

Sep 10, 2023 · 1 like · 4,215 followers View post →
Aaron Collins
@masknerd · X

@joeyfox85 Interesting given the conclusion of Woods' work was "The source showed an erythemogenic or CPD potential at lower doses than those required to reach the reported threshold bacteriostatic effect." when using the Steril-Ray. Filtered 222nm didn't show that. https://t.co/XwWmqls1NL

Aug 9, 2022 · 2 likes · 49,643 followers View post →
AFG(アンファング)
@6yZVjuxQn7n2tWL · X

@FarUV_Sterilray @mas44022884 When comparing Sterilray and Ushio's 222nm UVC, there is clearly a big difference in whether or not it produces erythema. Do you use a band-pass filter to remove the harmful wavelengths? This is all for safety reasons. https://t.co/MxwUjZpZxV

Jan 26, 2021 · 3 likes · 1,685 followers View post →
Jordi
@jotabefe1 · X

12 de Diciembre de 2014 "El efecto de la prueba fotográfica UVC de 222 nm en la piel sana de un voluntario: un estudio piloto" https://t.co/Yyy39ma1gz

Dec 31, 2020 · 1 like · 43 followers View post →
Gabriel
@Gabriel050111 · X

@ChristinaSFLaw @JabraneLabidi @RealSexyCyborg If you really don't want to trust me on that, just read this article : https://t.co/lFUldsIyv8

Mar 27, 2020 · 586 followers View post →
Emily
@the_aiju · X

@judegomila @RajBhakta One paper claims an absorption depth issue, rather than reflectivity, to be the cause. https://t.co/lM28UsCFS4 Seems to contradict the safety on skin (not sure what to make of it)

Mar 7, 2020 · 3 likes · 6,397 followers View post →
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