The relation between sun protection factor and amount of suncreen applied in vivo.

A Faurschou, H C Wulf

April 2007 Br J Dermatol

Synopsis of Social media discussions

The discussions demonstrate a strong emphasis on scientific findings about sunscreen SPF and application, with examples like sharing videos explaining correct usage ('creme solari: istruzioni scientifiche per l'uso'), and users expressing newfound understanding, such as realizing they had been applying less than recommended. The tone is informative and encouraging, showing a community eager to learn and improve sun protection habits.

A
Agreement
 Moderate agreement

Most discussions agree on the importance of proper sunscreen application based on scientific research, emphasizing correct usage and effects of application amounts.

I
Interest
 High level of interest

There is a high level of interest, as many posts share videos, tutorials, and personal tips about sunscreen usage, highlighting genuine curiosity.

E
Engagement
 High engagement

Posts reflect deep engagement through references to scientific content, videos, and clarifications, with users sharing resources and actively discussing practical applications.

I
Impact
 High level of impact

The conversations seem to influence practical behaviors and attitudes toward sunscreen, with many urging proper application for effective sun protection.

Social Mentions

YouTube

3 Videos

Twitter

69 Posts

News

5 Articles

Reddit

3 Posts

Metrics

Video Views

308,813

Total Likes

16,689

Extended Reach

1,066,438

Social Features

80

Timeline: Posts about article

Top Social Media Posts

Posts referencing the article

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Impact of Sunscreen Application Amount on SPF Effectiveness

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January 22, 2021

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9,794 views

  • Gina
    @Gina76280162 (Twitter)

    RT @mmpbowen: @ScaltritiLab Tanto anche se le usano non sanno metterle, ne usano pochina per tutto il corpo. Per saperle utilizzare c'è qu…
    view full post

    April 30, 2025

    1

  • Bowen
    @mmpbowen (Twitter)

    @ScaltritiLab Tanto anche se le usano non sanno metterle, ne usano pochina per tutto il corpo. Per saperle utilizzare c'è questo video di Divulgatrice. https://t.co/A5BUPdQZ5F
    view full post

    April 30, 2025

    26

    1

  • Paciugo
    @MassiPaciugo (Twitter)

    @Doctor_D03 Una 20 protegge già dal 95% della radiazione solare. https://t.co/Xt42ZXo4Mx
    view full post

    June 22, 2024

  • Elia Vaccarella
    @vaccarellaelia (Twitter)

    RT @83221n4ndr34: Creme solari: istruzioni scientifiche per l'uso https://t.co/alrID3zlQn via @divagatrice
    view full post

    May 14, 2024

    1


  • @83221n4ndr34 (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/alrID3zlQn via @divagatrice https://t.co/Kx77oyTmk5
    view full post

    May 14, 2024

    14

    1

  • bianca
    @revivefromashes (Twitter)

    RT @isatbytheriver: Se non l'avete visto, vi consiglio questo video di Beatrice maurino sulle creme solari https://t.co/aj7O80raw2
    view full post

    June 26, 2023

    1

  • marina
    @isatbytheriver (Twitter)

    Se non l'avete visto, vi consiglio questo video di Beatrice maurino sulle creme solari https://t.co/aj7O80raw2
    view full post

    June 25, 2023

    1

    1

  • Bowen
    @mmpbowen (Twitter)

    @scherzilla @Rotelli_MD L'assorbi lo stesso tranquillo, la gente mette poca crema rispetto a quanto dovrebbe e sempre con filtri bassi. https://t.co/A5BUPdRwVd
    view full post

    January 16, 2023

    1

  • Gianni Cassandra☮️
    @cipgianni (Twitter)

    @mmattana @michymus2 @la_bongia @divagatrice Grazie mille, ero assolutamente nella media (non sapevo un tubo). Ricambio condividendo il link di un video dell'autrice da te citata (molto brava) in cui spiega le stesse cose: https://t.co/OWp8YFr1wq
    view full post

    August 9, 2022

  • Salvo
    @Mr_NotteNera (Twitter)

    @la_bongia Forse trovi una risposta in questo video https://t.co/bS0VIGPK16
    view full post

    August 9, 2022

    1

  • Alexander Weiss
    @Ophyucus (Twitter)

    @margherita_n72 @michymus2 @mmattana @la_bongia @ilpost Oltre al podcast, che è ormai iper famoso, c'è anche per i suoi fedelissimi il suo canale YouTube in cui "parla di cosmetici, ma visti con gli occhi della scienza": https://t.co/vJUJ6aK9yv
    view full post

    August 9, 2022

    2

  • ofelia
    @wowyuns (Twitter)

    RT @isatbytheriver: Applicate la crema solare ogni 2 h dopo il bagno SEMPRE e guardate questo video invece di ascoltare influencer ignorant…
    view full post

    July 4, 2021

    2

  • bianca
    @revivefromashes (Twitter)

    RT @isatbytheriver: Applicate la crema solare ogni 2 h dopo il bagno SEMPRE e guardate questo video invece di ascoltare influencer ignorant…
    view full post

    July 3, 2021

    2

  • marina
    @isatbytheriver (Twitter)

    Applicate la crema solare ogni 2 h dopo il bagno SEMPRE e guardate questo video invece di ascoltare influencer ignoranti https://t.co/RCCKjFvzdR
    view full post

    July 3, 2021

    5

    2

  • MatildeOdiavaIGatti
    @MartaDOnofrio1 (Twitter)

    RT @MafaldaraS: Vi suggerisco di investire dieci minuti del vostro tempo per capire finalmente un po' di cose sulle protezioni solari! (gra…
    view full post

    June 12, 2021

    3

  • Beatrice Mautino
    @divagatrice (Twitter)

    RT @MafaldaraS: Vi suggerisco di investire dieci minuti del vostro tempo per capire finalmente un po' di cose sulle protezioni solari! (gra…
    view full post

    June 12, 2021

    3

  • Sara la coltivaCose
    @MafaldaraS (Twitter)

    Vi suggerisco di investire dieci minuti del vostro tempo per capire finalmente un po' di cose sulle protezioni solari! (grazie @divagatrice) https://t.co/1tCVIgM7kM
    view full post

    June 12, 2021

    19

    3

  • RO
    @luvmyhnlzl (Twitter)

    @zniewazenie tak, ale artykuł jest z prasy specjalistycznej, sama Ania jest biotechnologiem, a artykuł jest napisany na podstawie badań https://t.co/mRgm1pK5ph
    view full post

    March 27, 2021

    7

  • Udegbunam Chukwudi
    @UdegbunamChuks (Twitter)

    SPF vs Amount: Does The Label Even Matter? Why You Shouldn't Throw Out Y... https://t.co/IVB9LcTboY via @glowbyramon
    view full post

    February 17, 2021

  • rummy
    @yohkatheryn (Twitter)

    è una gran cazzata quella che ha detto samantha ragazzi pls informatevi - https://t.co/YTMs4KUpvt - https://t.co/I1wMkJq1NY #gfvip https://t.co/suXnO4qfux https://t.co/9n9b6nSyjE
    view full post

    February 4, 2021

    1

  • Ramón
    @glowbyramon (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 22, 2021

    11

  • s
    @moisturizedRN (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 22, 2021

    11

  • mehdi
    @mehditowear (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 22, 2021

    11

  • bandthony bourdain
    @Ur_asimpleton (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 21, 2021

    11

  • tosin | the influencer godmother
    @TheTosinOlaniyi (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 21, 2021

    11

  • Esther Olu
    @estherolu (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 21, 2021

    11

  • Amber
    @herricaneamber (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 21, 2021

    11

  • Lateef
    @LateefSaka (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 21, 2021

    11

  • ricardo
    @normajeansgone (Twitter)

    RT @glowbyramon: With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you w…
    view full post

    January 21, 2021

    11

  • Ramón
    @glowbyramon (Twitter)

    With recent news of sunscreens not meeting advertised SPF values, I wanted to dig into what protection looks like if you wear MORE than just 2 mg/cmˆ2, and how that affects sunscreens like Purito/Keep Cool. Does wearing extra sunscreen make a difference? https://t.co/VekVwSuGXs https://t.co/JSOqO9bP8E
    view full post

    January 21, 2021

    44

    11

  • Levosimmenthal
    @Occhioazzurro1 (Twitter)

    @Javiscon1 https://t.co/41zAKtfLGD lei è una divulgatrice molto brava. Il video è fatto bene
    view full post

    August 11, 2020

  • rellapdrella
    @rellapdrella (Twitter)

    @LiaCeli sul tema consiglio questo video https://t.co/32UEDpIy6z
    view full post

    July 21, 2020

  • Ilaria P.
    @chiocciolina88 (Twitter)

    E voi sapete come usare le creme solari? Video a dir poco illuminante che ho girato anche ai miei (perché non mi è venuto in mente di farlo prima?
    view full post

    July 19, 2020

  • LAURA CECCOLINI
    @LAURACECCOLINI (Twitter)

    RT @biemmic: @MedBunker Ne approfitto per un po' di buona informazione, che capire i fattori di protezione non è banale https://t.co/pMC4y6…
    view full post

    July 12, 2020

    1

  • Michele Biemmi
    @biemmic (Twitter)

    @MedBunker Ne approfitto per un po' di buona informazione, che capire i fattori di protezione non è banale https://t.co/pMC4y66gJc
    view full post

    July 12, 2020

    4

    1

  • R
    @_r3bs (Twitter)

    https://t.co/PKMd2bHXis Vi lascio questo video di @divagatrice che spiega tutto per bene
    view full post

    July 3, 2020

  • bianca
    @revivefromashes (Twitter)

    RT @isatbytheriver: E se avete dubbi sul quanto, come etc guardate questo video della bravissima Beatrice Mautino https://t.co/aj7O80raw2
    view full post

    June 30, 2020

    1

  • marina
    @isatbytheriver (Twitter)

    E se avete dubbi sul quanto, come etc guardate questo video della bravissima Beatrice Mautino https://t.co/aj7O80raw2
    view full post

    June 30, 2020

    2

    1


  • @ilPier_ (Twitter)

    @Pier_dll Quando sento protezioni solari mi viene in mente la Mautino Ti consiglio di vedere questo https://t.co/mOpgxNqX6v
    view full post

    June 14, 2020

  • e
    @ellilopez (Twitter)

    @merdetriste https://t.co/UhMUEfNr9k
    view full post

    February 3, 2020

    1


  • @antartidee (Twitter)

    Momento consigli non richiesti: -Mettete 30 grammi di crema alla volta(si 30, no non ci fate tutta l'estate con un flacone) -applicate la ogni 2 ore Lei spiega molto meglio di me il perché(si, sto diventando vecchia e logorroica e fissata con la crema) https://t.co/ZjpSNMeuug
    view full post

    August 24, 2019


  • @ilPier_ (Twitter)

    @Leeenos_ Risponde a tutto quanto lei https://t.co/mOpgxNqX6v Guardatelo
    view full post

    August 14, 2019

  • yAkenya
    @ossidoreduttasi (Twitter)

    @Sarinski_ Se può servire a qualcuno, qui https://t.co/wnFHcOH8T6 una biotecnologa e divulgatrice scientifica spiega come ad esempio spalmare metà della dose consigliata di una crema con SPF 30 non valga come una 15, ma √30 = cioè come se la protezione fosse di circa 5! Spero sia utile :)
    view full post

    August 7, 2019

    5

  • Health me food
    @Healthmefood (Twitter)

    RT @DjChiamaItalia: Al telefono con noi la divulgatrice scientifica Beatrice Mautino (@divagatrice su Instagram) che ci parla della campagn…
    view full post

    August 2, 2019

    3

  • Beatrice Mautino
    @divagatrice (Twitter)

    RT @DjChiamaItalia: Al telefono con noi la divulgatrice scientifica Beatrice Mautino (@divagatrice su Instagram) che ci parla della campagn…
    view full post

    August 2, 2019

    3

  • giulia
    @raspa90 (Twitter)

    RT @DjChiamaItalia: Al telefono con noi la divulgatrice scientifica Beatrice Mautino (@divagatrice su Instagram) che ci parla della campagn…
    view full post

    August 1, 2019

    3

  • Deejay chiama Italia
    @DjChiamaItalia (Twitter)

    Al telefono con noi la divulgatrice scientifica Beatrice Mautino (@divagatrice su Instagram) che ci parla della campagna social #iononmiscotto https://t.co/TJRCuNJEhv https://t.co/kMmtKNJNvG
    view full post

    August 1, 2019

    13

    3

  • Sara la coltivaCose
    @MafaldaraS (Twitter)

    Mah, magari a chi va al mare prossimamente queste cose interessano... https://t.co/eJidVwNdkQ
    view full post

    July 28, 2019

  • Marco Pitalieri
    @Pikitano (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/dzpZ48kftI di @YouTube
    view full post

    July 6, 2019

  • Potrei essere polemica✨
    @lauinpigiama (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/B5e1Rn3xE6 via @YouTube
    view full post

    July 6, 2019

  • Silvy
    @silvyg33 (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/EOhClvVJir via @YouTube
    view full post

    July 6, 2019

  • antonella antonella
    @giambellina (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/ebasTvcBRM
    view full post

    June 24, 2019

  • simonetta
    @75simonetta (Twitter)

    RT @Miss_FrancyM: Amici, visto che da voi in Italia è iniziata l'estate, vi consiglio di guardare questo video di @divagatrice Finalmente…
    view full post

    June 15, 2019

    1


  • @Miss_FrancyM (Twitter)

    Amici, visto che da voi in Italia è iniziata l'estate, vi consiglio di guardare questo video di @divagatrice Finalmente importanti chiarimenti sulle creme solari (protezioni e come usarle). L'ho visto ieri e mi ha aperto un mondo. Grazie Beatrice
    view full post

    June 15, 2019

    4

    1

  • L'Altra Mantova
    @AltraMantova (Twitter)

    #CremeSolari, istruzioni per un uso corretto Farmacia Beduschi https://t.co/wuNneldqZq
    view full post

    June 14, 2019

  • Bianca Corradetti
    @DOLCEESTETICA (Twitter)

    Ascolta e impara!! https://t.co/F2OXKCiXxx
    view full post

    June 12, 2019

  • Monia Marchettini
    @ArgiaSbolenfi (Twitter)

    Sappiamo mettere la crema solare?
    view full post

    June 8, 2019

  • Agata Rooth
    @KDlenny (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/rz7i6zP0mQ di @YouTube
    view full post

    June 7, 2019

  • lallapeace
    @laura_pacelotho (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/owKKQlg12y
    view full post

    June 6, 2019

  • Alessandro Beria
    @Odisseo2010 (Twitter)

    Che cosa significa #SPF? Quanta crema solare bisogna mettere? Ogni quanto è necessario riapplicarla? ... ne sappiamo davvero poco. Sentiamo che cosa dice la #scienza. E seguiamo @divagatrice, perché ... ti salva la vita! https://t.co/LkZi9kkAuJ di @YouTube @danberia
    view full post

    June 6, 2019

    2

  • Alberto Zorzi
    @albiz94 (Twitter)

    “Creme solari: istruzioni scientifiche per l'uso” https://t.co/oblLXCm74z https://t.co/relm5XSFO6
    view full post

    June 6, 2019

    1


  • @_Call_Me_Liv (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/89HYigDq71 di @YouTube Quindi ho sempre sbagliato tutto xD
    view full post

    June 5, 2019

  • lowcuras
    @lowcuras (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/DJoPsVLJqG di @YouTube
    view full post

    June 3, 2019

  • PasAlga
    @pasalga (Twitter)

    "Creme solari: istruzioni scientifiche per l'uso" https://t.co/mbB4LcX2O6
    view full post

    June 3, 2019

  • Monica Subba
    @subba_monica (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/FWRUWQpstN di @YouTube
    view full post

    June 3, 2019

  • Mauro Colombo
    @Mauro_Colombo7 (Twitter)

    Con l'arrivo della bella stagione, potrebbe essere utile qualche informazione scientifica sulle creme solari. https://t.co/gvafxAM2Fu
    view full post

    June 3, 2019

  • Giusy
    @Katanesella (Twitter)

    Creme solari: istruzioni scientifiche per l'uso https://t.co/G7uG0dtmoE di @YouTube
    view full post

    June 3, 2019

  • Grizzly 
    @g_sr (Twitter)

    Mi è piaciuto un video di @YouTube: https://t.co/vFexvFCKGw Creme solari: istruzioni scientifiche per l'uso
    view full post

    June 3, 2019

  • Cristina Corrado
    @cricorrado (Twitter)

    Finito maggembre sembra di essere a ferragosto, rispolverate le vostre #cremesolari scadute, ma sapete come renderle veramente efficaci? Le #istruzioni scientifiche per l'uso di uno dei cancerogeni certi preferiti dalla gente: il sole https://t.co/c8vCZHWq2u #beatricemautino
    view full post

    June 3, 2019

  • Sunscreen Use Optimized by Two Consecutive Applications 2018 ...

    Br J Dermatol 2007 Apr; 156(4):716–9. https://doi.org/10.1111/j.1365-2133.2006.07684.x PMID: 17493070 7. Petersen B, Wulf HC. Application of sunscreen ...
    view full post

    December 11, 2025

    News

  • Ijirt151451 Paper | PDF | Sunscreen | Ultraviolet

    156 (4): 716–9. uniform UVA /UVB protective sunscreen product doi:10.1111/j.1365-2133.2006.07684.x. PMID with high SPF can be minimum ideal requirement but ...
    view full post

    December 11, 2025

    News

  • SAFEST UNDER THE SUN? PRACTICES APPLIED BY ...

    Br J Dermatol. 2007; 156: 716-719. https://doi.org/10.1111/j.1365-2133.2006.07684.x. 10. Mahmoud BH, Ruvolo E, Hexsel CL, Liu Y, Owen MR ...
    view full post

    July 12, 2024

    News

  • Pełny tekst: SAFEST UNDER THE SUN? PRACTICES APPLIED BY ...

    Br J Dermatol. 2007; 156: 716-719. https://doi.org/10.1111/j.1365-2133.2006.07684.x. 10. Mahmoud BH, Ruvolo E, Hexsel CL, Liu Y, Owen MR ...
    view full post

    July 12, 2024

    News

  • Health Problems of Civilization eISSN: 2354-0265, ISSN: 2353-6942 ...

    Br J Dermatol. 2007; 156: 716-719. https://doi.org/10.1111/j.1365-2133.2006.07684.x. 10. Mahmoud BH, Ruvolo E, Hexsel CL, Liu Y, Owen MR ...
    view full post

    April 3, 2024

    News

  • Sunscreen tips !!! Hope this helps, it definitely helped me ❤️ : r ...

    ... 10.1111/j.1365-2133.2006.07684.x ) you will see that SPF factor drops when you don't put enough. SPF is calculated at about 2mg/cm2 of ...
    view full post

    July 23, 2019

    Reddit

  • Советы по солнцезащитному крему!!! Надеюсь, это поможет ...

    ... 10.1111/j.1365-2133.2006.07684.x ), то увидите, что SPF падает, когда вы наносите недостаточно. SPF рассчитывается примерно при 2 мг/см2 ...
    view full post

    July 23, 2019

    Reddit

  • Mga tips sa paggamit ng sunscreen!!! Sana makatulong ito ...

    ... 10.1111/j.1365-2133.2006.07684.x ) makikita niyo na bumababa ang SPF factor kapag kulang ang lagay. Ang SPF ay kinakalkula sa halos 2mg/cm2 ...
    view full post

    July 23, 2019

    Reddit

Abstract Synopsis

  • The study investigated how the amount of sunscreen applied in vivo affects the SPF, finding that SPF increases exponentially with more sunscreen, rather than linearly.
  • When less sunscreen is applied (e.g., 0.5 mg/cm²), the SPF decreases sharply, following a square or fourth root relationship, meaning small reductions in application significantly lower protection.
  • The results suggest that applying the full recommended amount (2 mg/cm²) is crucial for effective sun protection and that applying less drastically diminishes SPF, following an exponential growth model with a high correlation (r² 0.903).]