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Global state of sunscreens
- U. Osterwalder, M. Sohn, B. Herzog
- Geography, MedicinePhotodermatology, photoimmunology & photomedicine
- 1 April 2014
The role of ultraviolet (UV) filters, emollients, emulsifier systems and other components in a sunscreen, as well as trends in formulations in Europe, North America, Latin America, and Asia Pacific are explained.
In vivo and in vitro assessment of UVA protection by sunscreen formulations containing either butyl methoxy dibenzoyl methane, methylene bis‐benzotriazolyl tetramethylbutylphenol, or microfine ZnO
- B. Herzog, S. Mongiat, C. Deshayes, M. Neuhaus, K. Sommer, A. Mantler
- Chemistry, MedicineInternational journal of cosmetic science
- 1 June 2002
The UVA‐attenuating properties of the three UVA filters butyl methoxy dibenzoyl methane (BMDBM), methylene bis‐benzotriazolyl tetramethylbutylphenol (MBBT), and microfine zinc oxide (ZnO), are compared to show a loss of UVA protection in some BMDBM formulations.
Photostability of UV Absorber Systems in Sunscreens †
Being aware of mechanisms and applying them for specific UV filter combinations can help in designing efficient sunscreens, and it is important to understand the photostability properties of the complete system.
Sun protection factors: world wide confusion
- U. Osterwalder, B. Herzog
- Computer Science, MedicineThe British journal of dermatology
- 22 September 2009
It is shown that the accuracy and robustness of the SPF and other Protection Factors will improve significantly with the availability of true broad‐spectrum sunscreens rather than conventional UVB‐biasedSunscreens, because uniform protection profiles lead to protection independent of the action spectrum of the endpoint and the UV‐radiation source.
Prediction of sun protection factors by calculation of transmissions with a calibrated step film model.
- B. Herzog
- Chemistry, MedicineJournal of cosmetic science
The aim of the present investigation is to provide an alternative tool for the estimation of SPF values using a calculation based on the UV spectroscopic properties of the individual UV absorbers using a step film model.
Prediction of sun protection factors and UVA parameters of sunscreens by using a calibrated step film model.
- B. Herzog, S. Mongiat, K. Quass, C. Deshayes
- Materials Science, MedicineJournal of pharmaceutical sciences
- 1 July 2004
Evidence for the usefulness of the step film model in terms of prediction of the sun protection factor is shown and it is demonstrated that parameters, which characterize the protection in the UVA range such as the U VA/UVB ratio and the critical wavelength can be calculated in good accordance with experimental data.
The long way towards the ideal sunscreen--where we stand and what still needs to be done.
This paper, based on a talk given at the London Sun Protection Conference, tries to answer the question about the "ideal sunscreen" and explores four key requirements of good UV protection regarding where the authors stand on a ranking scale between poor and perfect, and what still needs to be done.
The UV/Visible Radiation Boundary Region (385–405 nm) Damages Skin Cells and Induces “dark” Cyclobutane Pyrimidine Dimers in Human Skin in vivo
- K. Lawrence, T. Douki, R. Sarkany, Stephanie Acker, B. Herzog, A. Young
- Medicine, ChemistryScientific Reports
- 24 August 2018
This work demonstrates photodamage in this region for a number of different endpoints including cell viability, DNA damage, delayed cyclobutane pyrimidine dimers, differential gene expression and induction of oxidizing species in vitro in HaCaT keratinocytes and in vivo in human volunteers.