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SDPA Summer 2017 Live Blog

SDPA Summer | Live Blog | Essentials and Practicalities of Photoprotection

Dr. Henry Lim started Friday morning at the SDPA’s Annual Summer Dermatology Conference in San Diego, California off with a discussion on how to “protect our patients from the side effects of sun exposure”.

Dr. Lim reviewed the research supporting the use of sunscreen for reducing the development of photoaging and skin cancer. He discussed the FDA sunscreen guidelines that changed in 2011 to include broad spectrum coverage, sunscreen ingredients, and the controversy between vitamin D and sunscreen use. He also highlighted the data supporting oxybenzone, a UVA stabilizer, as the most common photoallergen.

Dr. Lim went on to describe nanoparticles that are found in newer sunscreen products. For instance, titanium dioxide nanoparticles work by reflecting, absorbing and scattering UV light.

With regards to antioxidants and sunscreen, the data supports that photostable antioxidants and sunscreen can be more beneficial in suppressing UV induced pigmentation better than sunscreen alone.

Dr. Lim also discussed the effect of visible light on the skin and its role in conditions aggravated by sun exposure such as post inflammatory hyperpigmentation and melasma. He stated that currently available organic UV filters are not sufficient to protect the skin from visible light. Again, antioxidants may be beneficial for these conditions.

Oral supplements for UV protection, including nicotinamide and polydium leucotomos, and new data supporting the addition of photolyases to sunscreens for the prevention of actinic keratoses, basal cell cancers and squamous cell cancers were reviewed. Finally, Dr. Lim emphasized the importance of educating patients to seek shade, wear sun protective clothing, broad brimmed hats, sunglasses and sunscreens.


Byline: Sarah Patton, PA-C, MSHS

Posted: June 3, 2017

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