Determining an Effective UV Radiation Exposure Time for Vitamin D Synthesis in the Skin Without Risk to Health: Simplified Estimations from UV Observations

Miyauchi, Masaatsu; Nakajima, H.

doi:10.1111/php.12651

Cited by 25 publications

(14 citation statements)

References 30 publications

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“…National Institute for Environmental Studies comments that getting exposure to UV ray for several (in summer) to several ten (in winter) minutes in Japan that will never reach 1 MED (Minimal Erythema Dose) for people with skin photo type III (Japanese people), will lead vitamin D synthesis while minimizing its harms [37]. And it provides in real-time the amount of vitamin D synthesized in the body at some locations in Japan on the web [38], based on the logics described by Miyauchi and Nakajima[39]. Individuals should also be informed of the benefits of UV rays when alerted about its risk, with the available information shown above.…”

Section: Discussionmentioning

confidence: 99%

High frequency of vitamin D deficiency in current pregnant Japanese women associated with UV avoidance and hypo-vitamin D diet

et al. 2019

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Background As a consequence of indoor occupations and reduced exposure to sunlight, concerns have been raised that vitamin D deficiency is widespread in developed countries. Vitamin D is known to be associated with increased risks of morbidity and mortality in various diseases. Objective To investigate the serum vitamin D status and its relation with life-style factors in pregnant Japanese women. Methods Among a cohort for 3,327 pregnant women who participated in an the adjunct study of the Japan Environment and Children's Study during 2011–2013, in which data were obtained on various life-style factors, including both dietary intake of vitamin D and frequency of UV exposure, this study consisted of 1,592 pregnant women, from whom 2,030 serum samples were drawn in Jan, Apr, Jul, and Oct, and the association between serum 25(OH)D level and life-style factors were analyzed using linear mixed models. Results Serum 25(OH)D levels were less than 20ng/mL in 1,486 of 2,030 samples (73.2%). There was an obvious seasonal change, with serum 25(OH)D levels of less than 20 ng/mL in 89.8% and 47.8% of samples in spring (April) and autumn (October), respectively. Both the frequency spent under sunlight and dietary intake of vitamin D were significantly associated with serum 25(OH)D level. An increase in sunlight exposure of more than 15 min for 1 to 2 days per week in non-winter, or dietary intake of 2 μg/day of vitamin D resulted in an elevation of 1 ng/mL in serum 25(OH)D levels. Conclusion These findings indicate that vitamin D deficiency is very severe in Japanese pregnant women, especially those rarely exposed to sunlight. The benefits of UV rays should also be informed of when its risk is alerted, and clinicians should propose the adequate UV exposure level.

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Section: Discussionmentioning

confidence: 99%

High frequency of vitamin D deficiency in current pregnant Japanese women associated with UV avoidance and hypo-vitamin D diet

et al. 2019

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“…This study is also the first study to measure and adjust irradiance to the preset target prior to each exposure to elucidate the effects of various low dosages of narrow-band UVB irradiation. Few existing studies measured irradiance before exposure, or used devices that could be adjusted to meet the preset target [31][32][33][34][35] . In addition, although many investigations have focused on the effects of UV irradiation dosage on vitamin D levels in vivo, some of them used irradiation that was much higher than SED, which makes further clinical applications as a "health lamp" less pragmatic 28,36 .…”

Section: Discussionmentioning

confidence: 99%

Low dose ultraviolet B irradiation at 308 nm with light-emitting diode device effectively increases serum levels of 25(OH)D

Lin

Lim

Tsai

et al. 2021

Sci Rep

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This animal study aimed to elucidate the relationship of low-dose, narrow-band UVB at 308 nm with vitamin D synthesis. C57BL/6 female mice, at 3 weeks-of-age, were randomly divided into the following six groups (n = 6 at each time point of vitamin D measurement), which were: (1) normal diet without UVB irradiation; (2) VDd diet without UVB irradiation; and (3)–(6) VDd diet with 308 nm-UVB irradiation of 12.5, 25, 50, and 100 μω/cm2, respectively. All of the groups needing UVB irradiation received an exposure of 10 min per day, five days per week, and a duration of 3–5 weeks. The mice recovering from severe VDd (plasma total 25-hydroxyvitamin D level increasing from approximately 3 to over 30 ng/mL) only occurred in groups with a UVB irradiation dosage of either 50 or 100 μω/cm2. The optimal, estimated dosage for mice to recover from severe VDd was 355 mJ/cm2 within 3 weeks. Low-dose, narrow-band UVB irradiation at 308 nm is effective in improving VDd in mice. The results obtained, in addition to the especially small side effects of the above UVB irradiation formula, could be further translated to treating VDd-related disorders.

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“…Berikutnya, berjemur di bawah sinar matahari dilakukan partisipan untuk meningkatkan produksi vitamin D yang berfungsi untuk meningkatkan kekebalan tubuh dalam melawan COVID-19. Hal ini sesuai dengan hasil penelitian (Miyauchi & Nakajima, 2016) yang memperlihatkan fakta bahwa berjemur dengan hanya wajah dan kedua punggung tangan saja yang terkena sinar matahari selama 6-7 menit, maka tubuh akan menghasilkan 10 µg vitamin D atau setara dengan 400 IU, jumlah vitamin D standar yang dibutuhkan oleh tubuh per hari.…”

Section: ) Melakukan Pengobatanunclassified

Pengalaman Perawat Saat Terkonfirmasi Covid-19 Di Rumah Sakit Dokter H. Mochammad Ansari Saleh Banjarmasin

Iswanti¹,

Ilmi²,

Syafwani³

2021

SLJIL

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Tujuan penelitian adalah untuk mengekplorasi pengalaman perawat yang bekerja di rumah sakit dokter H. Mochammad Ansari Saleh Banjarmasin saat terkonfirmasi COVID-19. Data kualitatif diperoleh melalui wawancara mendalam pada tujuh perawat di rumah sakit tersebut. Penelitian ini menggunakan metode penelitian kualitatif dengan pendekatan fenomenologi, yang bertujuan untuk mengidentifikasi dan mengeksplorasi pengalaman perawat saat terkonfirmasi COVID-19. Ada tujuh responden yang terlibat pada penelitian ini. Tujuh responden ini adalah perawat yang merawat pasien terkonfirmasi COVID-19 yang masih berkerja di ruangan COVID-19 setelah dinyatakan sembuh dari COVID-19. Hasil penelitian menemukan 6 tema utama yaitu: 1) Proses penularan COVID-19; 2) Alasan melakukan pemeriksaan diagnostik; 3) Mengalami gejala COVID-19; 4) Mengalami gejala efek samping obat; 5) Tindakan yang dilakukan setelah terkonfirmasi COVID-19; dan 6) Mencari informasi tentang COVID-19. Saat terkonfirmasi COVID-19 menurut sebagian besar partisipan adalah pengalaman yang tidak terlalu luar bisa, namun mereka tetap mengalami kecemasan meskipun sudah mempersiapkan fisik dan mental Penyakit COVID-19 dialami termasuk dalam derajat ringan, sehingga kesempatan untuk sembuh sangat besar. Pengalaman perawat saat terkonfirmasi COVID-19 menurut sebagian besar partisipan adalah pengalaman yang tidak terlalu luar bisa, namun saat terkonfirmasi COVID-19 mereka tetap mengalami kecemasan meskipun mereka menyatakan sebelum itu terjadi mereka sudah mempersiapkan fisik dan mental apabila suatu saat mereka terkonfirmasi COVID-19.

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Determining an Effective UV Radiation Exposure Time for Vitamin D Synthesis in the Skin Without Risk to Health: Simplified Estimations from UV Observations

Cited by 25 publications

References 30 publications

High frequency of vitamin D deficiency in current pregnant Japanese women associated with UV avoidance and hypo-vitamin D diet

High frequency of vitamin D deficiency in current pregnant Japanese women associated with UV avoidance and hypo-vitamin D diet

Low dose ultraviolet B irradiation at 308 nm with light-emitting diode device effectively increases serum levels of 25(OH)D

Pengalaman Perawat Saat Terkonfirmasi Covid-19 Di Rumah Sakit Dokter H. Mochammad Ansari Saleh Banjarmasin

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