Sunscreen: oxybenzone, retinyl palmitate

Burning questions: How to pick the right sunscreen — and which ones to avoid
Star Tribune June 13, 2016

Watch out for two common — and potentially toxic — ingredients: oxybenzone and retinyl palmitate. Oxybenzone is a hormone disrupter that mimics estrogen.

Retinyl palmitate, a form of Vitamin A, is said to bolster the body’s defense system against ultraviolet A rays. But, Lunder cautioned, a federal study found that animals exposed to this ingredient and UV light had more skin tumors and lesions than other animals whose skin was not treated with it.

“No sunscreen can reliably protect you for more than two hours,” Lunder said, “so nobody needs an SPF value of higher than 50.”

lotions offer better coverage than sprays, which provide only a light coating of protection. He also warned that with spray cans, it’s easy for you or your child to accidentally inhale the chemicals emitted as you apply it.

Think of sunscreen as a last resort.
Seeking shade and staying out of the direct sun during peak hours — 10 a.m. to 2 p.m. — offers the best protection. Another foolproof method: Cover up. Wear a hat, sunglasses and lightweight clothing.
“Wearing a light shirt offers better and more stable protection from UV rays than sunscreen,” Lunder said. “Our goal is for people to have a more realistic expectation of what kind of protection sunscreen offers — to not rely on it as a first line of defense.”


¡Cuidado con el sol! Qué crema fotoprotectora elegir para tus hijos y cómo aplicársela
Julio 26, 2016


BOOK: Living With Itch

A Scientist’s Mission To Break The Itch-Scratch Cycle
August 14, 2014

Dr. Gil Yosipovitch chairs the Department of Dermatology at Temple University and is the co-author of “Living With Itch: A Patient’s Guide.”

I perfectly use them – agree with you – and perfectly use them as my treatments for patients with chronic itch. They don’t work for all types, but those where there is neuropathic or damage to the nerve fibers, they work very well. Gabapentin or the Pregabalin; these are drugs that work for our patients.
We sometimes use them in combination with other class of drugs from the anti-depression of those called Selective Norepinephrine Reuptake Inhibitor and it’s not that our patients are depressed; they could be sometimes depressed due to horrible chronic itch, but because these drugs work in an additive effect, in reducing that sensitization what the nerve fibers as I mentioned, are acting wacky and firing. They reduce that firing of the nerve fibers, that’s why it enables our patient to sleep better and to have less itch.

So a lot of times I’m asked by other colleagues, why do you give antidepressant? Why do you give anticonvulsants like Gabapentin, Pregabalin, and I say, I give them because it really reduces the itch intensity and the suffering. So there is a lot of similarities here with chronic pain.

… And they sometimes would dismiss the patient – say, oh, well if you have itch, I’m not bothered with it; we just want to deal with pain.
But, I see that as part of the same spectrum.




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Primary Care Dermatology Society

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