March 2011 PMID 21164152

Blue light from light-emitting diodes elicits a dose-dependent suppression of melatonin in humans.

Kathleen E West, Michael R Jablonski, Benjamin Warfield, Kate S Cecil, Mary James, Melissa A Ayers, James Maida, Charles Bowen, David H Sliney, Mark D Rollag, John P Hanifin, George C Brainard

Mentions

69
Peak: 12 in May 2017
across 7 sources since May 2017

Extended reach

97,386
potential audience

Total likes

92

Video views

1,037

Mentions per month

May 2017 – Dec 2025

Where it's discussed

  • X / Twitter27 posts
  • Facebook13 posts
  • Reddit13 posts
  • News7 articles
  • TikTok5 posts
  • YouTube2 videos
  • Instagram2 posts

AI synopsis

What people are saying

Discussions consistently underline the dose-dependent effect of blue light on melatonin suppression and emphasize its influence on health, with examples such as references to specific wavelengths (446-477 nm), comparisons to standard lighting, and advice on protective measures like glasses or lighting choices, highlighting both scientific interest and concern for real-world impact.

AgreementModerate agreement

Most discussions acknowledge the study's findings about blue light and melatonin suppression, with some explicitly supporting the implications, though a few express skepticism or call for more information.

InterestHigh interest

Users demonstrate high curiosity, referencing specific wavelengths, health effects, and protective measures, indicating strong engagement with the topic.

EngagementModerate engagement

Several discussions delve into mechanisms, health consequences, and practical applications, showing thoughtful analysis rather than surface-level reactions.

ImpactHigh impact

The widespread sharing of findings and concerns about health implications suggest that the topic is perceived as having significant relevance for personal health and societal practices.

Abstract in brief

  • Blue light from LEDs, especially in the 446-477 nm range, significantly suppresses melatonin in humans in a dose-dependent manner, with shorter wavelengths producing the strongest effect.
  • The study found that increasing irradiance of blue LED light leads to greater melatonin suppression, and this effect can be modeled using a sigmoidal fluence-response curve, indicating a measurable relationship between light exposure and melatonin levels.
  • Compared to standard 4000 K white fluorescent lighting, blue LED light appears more effective at reducing melatonin, which has implications for alertness and circadian rhythm disturbances in both occupational and everyday settings.]

Top posts

Most liked on X and Bluesky
htw
@heniek_htw · X

Blue #light from light-emitting diodes elicits a dose-dependent suppression of #melatonin in humans https://t.co/wQFek7lnsG https://t.co/1LOc4wpUdK

Jun 22, 2023 · 13 likes · 3 shares · 11,344 followers View post →
Rene Sugar
@renesugar · X

Blue light from light-emitting diodes elicits a dose-dependent suppression of melatonin in humans https://t.co/0LSfLjB1hf

Jun 21, 2023 · 11 likes · 1 share · 3,985 followers View post →
Sophia Margaret (25/50k)
@MophiaSargaret · X

@Sc_Meerkat @Blakityblakish @malcolmsramsay Sure! I’d be happy to do the work for you! If you click the first link in the image I showed and scrolled down to #2, they even link their source for you! Wow

Mar 20, 2021 · 5 likes · 440 followers View post →
KOJI@プライマルコーチ
@kojija · X

【睡眠中のブルーライトはメラトニン分泌を抑制】 2:00-3:30の間に被検者に光をあて、前後の血清メラトニンを測定 光に含まれるブルーライト量に依存してメラトニン量は減少 ブルーライト帯域である446-477 nmは最も強くメラトニンを抑制 https://t.co/nVcGQcLnPI https://t.co/KGzA0q2PSO

Jul 20, 2021 · 4 likes · 2,312 followers View post →
DEOPHEST ✂️✨
@ImDeophest · X

https://t.co/1EgzpSn6v9 "Light suppresses melatonin in humans, he strongest response occurring in the short-wavelength portion of the spectrum that appears blue. Blue light has also been shown to be more effective than longer-wavelength light for enhancing alertness."

Oct 23, 2021 · 2 likes · 1,361 followers View post →
eMe
@eMeHezzzonja · X

@theinstrulomloe @miguvela @RadioestadioN @silviapadronll https://t.co/0BIQux3xBF Aquí llevas, burradas. Que eres un burradas. Miles más sobre el tema puedes encontrar si supieras infórmate por ti mismo.

Oct 10, 2025 · 2 likes · 36 followers View post →

All mentions

no
@nullbotto · X

RT @nullbotto: @IndicGames @Valient77 @i2cjak @caloriesproper2 https://t.co/Kmh66f55YK

Dec 1, 2025 · 1 share · 434 followers View post →
no
@nullbotto · X

@IndicGames @Valient77 @i2cjak @caloriesproper2 https://t.co/Kmh66f55YK

Dec 1, 2025 · 1 share · 434 followers View post →
eMe
@eMeHezzzonja · X

@theinstrulomloe @miguvela @RadioestadioN @silviapadronll https://t.co/0BIQux3xBF Aquí llevas, burradas. Que eres un burradas. Miles más sobre el tema puedes encontrar si supieras infórmate por ti mismo.

Oct 10, 2025 · 2 likes · 36 followers View post →
Dr Rohen Kapur ☀️
@Dr_RohenKapur · X

@DrJackKruse https://t.co/sEfW7gx5qJ

Apr 19, 2025 · 7,602 followers View post →
Sixsmith
@CatOfLongTails · X

@vincristine @ICBMinvestments @brian_eno_69 Yeah, this is how science works for me: https://t.co/RqYAsPUsIH https://t.co/RqYAsPUsIH https://t.co/RqYAsPUsIH https://t.co/LMQ2tI8rcr

Jan 5, 2025 · 1,202 followers View post →
JayPNW
@Def1led · X

@MrColton @brandenflasch https://t.co/ATo51XdRUm

Dec 30, 2024 · 274 followers View post →
JayPNW
@Def1led · X

@brandenflasch LEDs significantly block melatonin production for one https://t.co/ATo51XdRUm I use incandescent in bedrooms

Dec 30, 2024 · 274 followers View post →
Colin Wyse
@realColinWyse · X

https://t.co/A4NUJMehkI https://t.co/3NkCzxa2G4

Dec 22, 2024 · 2,608 followers View post →
Remnant | MD
@RemnantMd · X

Dose-dependent suppression of Melatonin with Blue light LED vs 4000K Fluorescent bulb ref: https://t.co/nxzwUawQsh https://t.co/FJaRJaUPr7

Nov 29, 2023 · 32,610 followers View post →
Javi Ciborro
@papayaykware · X

https://t.co/FvKmGBicSw La luz azul de los diodos emisores de luz provoca una supresión dosis-dependiente de la melatonina en humanos

Oct 28, 2023 · 8,028 followers View post →
Bob
@bobverick · X

@RNCResearch And nothing messes up the circadian sleep cycle causing mental and physical health problems quite like an LED light. https://t.co/bLT5uUm27Z

Aug 2, 2023 · 1 like · 317 followers View post →
Alejandro Zoccola
@zoccosunlight · X

RT @heniek_htw: Blue #light from light-emitting diodes elicits a dose-dependent suppression of #melatonin in humans https://t.co/wQFek7lnsG

Jul 13, 2023 · 3 shares · 236 followers View post →
Javed Alam
@jalam1001 · X

RT @renesugar: Blue light from light-emitting diodes elicits a dose-dependent suppression of melatonin in humans https://t.co/0LSfLjB1hf

Jun 22, 2023 · 1 share · 1,004 followers View post →
Javed Alam
@jalam1001 · X

RT @heniek_htw: Blue #light from light-emitting diodes elicits a dose-dependent suppression of #melatonin in humans https://t.co/wQFek7lnsG

Jun 22, 2023 · 3 shares · 1,004 followers View post →
Dr. Philip Eckardt, MD
@MedEckardt · X

RT @heniek_htw: Blue #light from light-emitting diodes elicits a dose-dependent suppression of #melatonin in humans https://t.co/wQFek7lnsG

Jun 22, 2023 · 3 shares · 1,167 followers View post →
htw
@heniek_htw · X

Blue #light from light-emitting diodes elicits a dose-dependent suppression of #melatonin in humans https://t.co/wQFek7lnsG https://t.co/1LOc4wpUdK

Jun 22, 2023 · 13 likes · 3 shares · 11,344 followers View post →
Rene Sugar
@renesugar · X

Blue light from light-emitting diodes elicits a dose-dependent suppression of melatonin in humans https://t.co/0LSfLjB1hf

Jun 21, 2023 · 11 likes · 1 share · 3,985 followers View post →
Fustbariclation
@fustbariclation · X

@skdh It is amazing how sensitive we are to blue light. https://t.co/U4bG6yHmLu

Sep 15, 2022 · 2,160 followers View post →
EarlyDefence
@EarlyDefence · X

@hubermanlab Other side of the equation is protecting the eyes from excess short wavelength light at night. Elegant study here on dose-response melatonin suppression. Smartphones are easily capable of ‘overdosing’ blue light at night w/o filters or settings adjusted! https://t.co/FFHE1gWASV

Aug 8, 2022 · 156 followers View post →
DEOPHEST ✂️✨
@ImDeophest · X

https://t.co/1EgzpSn6v9 "Light suppresses melatonin in humans, he strongest response occurring in the short-wavelength portion of the spectrum that appears blue. Blue light has also been shown to be more effective than longer-wavelength light for enhancing alertness."

Oct 23, 2021 · 2 likes · 1,361 followers View post →
KOJI@プライマルコーチ
@kojija · X

【睡眠中のブルーライトはメラトニン分泌を抑制】 2:00-3:30の間に被検者に光をあて、前後の血清メラトニンを測定 光に含まれるブルーライト量に依存してメラトニン量は減少 ブルーライト帯域である446-477 nmは最も強くメラトニンを抑制 https://t.co/nVcGQcLnPI https://t.co/KGzA0q2PSO

Jul 20, 2021 · 4 likes · 2,312 followers View post →
RealFoodOptometrist
@ajwodecki · X

Also from 2011: https://t.co/VS268o5DPA

Jul 13, 2021 · 10,660 followers View post →
Sophia Margaret (25/50k)
@MophiaSargaret · X

@Sc_Meerkat @Blakityblakish @malcolmsramsay Sure! I’d be happy to do the work for you! If you click the first link in the image I showed and scrolled down to #2, they even link their source for you! Wow

Mar 20, 2021 · 5 likes · 440 followers View post →
Account closed
@ClosedAcc589 · X

@SyntheticPol @EvanKirstel https://t.co/Ar9ctreWbt

Jan 11, 2021 · 276 followers View post →
IRISUL - I Read I Summarize U Learn
@irisul_my · X

2. West, K., Jablonski, M., Warfield, B., Cecil, K., James, M., Ayers, M., Maida, J., Bowen, C., Sliney, D., Rollag, M., Hanifin, J. and Brainard, G., 2011. Blue light from light-emitting diodes elicits a dose-dependent suppression of melatonin in humans. Journal of Applied

Aug 10, 2020 · 51 followers View post →
con H de heterótrofo
@NutriRebel · X

@centinel5051 @Gerave7 La luz azul artificial por la noche suprime la melatonina, es ese el problema https://t.co/KnRFGrrguB

Jul 4, 2020 · 1 like · 5,938 followers View post →
Stephen Dexter
@StephenDexter9 · X

@LivSmit26243541 @ColleenMcmilin If you’re a nerd like me, the physiology of how the glasses work is really cool. I read this study if you’re interested! https://t.co/iHZMgamVP5 #NUTR401 @ColleenMcmilin

Mar 31, 2020 · 2 likes · 5 followers View post →
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