Beyond the Chill: Understanding Raynaud's Phenomenon
JAN 29, 2026Raynaud's phenomenon is a rare disorder that affects the blood vessels, most commonly in the fingers and toes, but sometimes also in the nose, ears, or lips.
Read More
If you’re headed to a distant beach this summer, you might want to check your bag. Many Mexican vacation spots already ask tourists to use natural rather than the chemical sunscreens. Four more popular vacation destinations are the process of banning chemical sunscreens:
Hawaii (2021)
Key West, Florida (2021)
Bonaire (2021)
Palau (2020)
Other locales are likely to follow this trend. It’s not because sunscreens are dangerous to humans. Instead they’re damaging coral reefs which are already struggling to survive. Researchers have found that chemical, non-biodegradable sunscreens cause bleaching, which is a whitening of coral tissues and eventual death. It also affects anemones and other creatures living on coral reefs. The sunscreen substance being banned is oxybenzone. It’s what you find in chemical sunscreens which absorb light and prevent harmful rays from sinking into the skin.
Instead, vacationers – and anyone concerned about oxybenzone’s impact on the environment – should choose sunscreens which are considered natural and physically block harmful rays. These sunscreens contain titanium oxide or zinc oxide. Also called sun blocks, both substances reflect the sun’s rays so they are not absorbed in the skin. These are widely available commercially under several brand names.
The only drawback to natural sunscreen is it can leave a white film on your skin, depending on the brand. As a dermatologist who treats skin cancers, I say: Who cares! When you’re out in the sun, it’s better to look protected. Remember, more people are diagnosed with skin cancer in the U.S. than all other cancers combined.
To those considering indoor tanning be prepare for a tropical vacation, please reconsider. More people develop skin cancer because of indoor tanning than develop lung cancer because of smoking. Those who have ever tanned indoors have a 67% increased risk of developing squamous cell carcinoma. If you’re looking for sunscreen alternatives, you may have run across sunscreen pills. While supplements containing Polypodium leucotomos can help prevent sun damage from UV rays, they are in no way a substitute for sunscreen.
Good sun habits are still the best approach for preventing skin cancers:
If you have kids, consider Australia’s SunSmart approach. It’s been successful in reducing skin cancers because it teaches healthy habits starting at a young age:
Raynaud's phenomenon is a rare disorder that affects the blood vessels, most commonly in the fingers and toes, but sometimes also in the nose, ears, or lips.
Read More
Winter brings beautiful snowy landscapes and cozy evenings, but the cold, dry air—indoors and out—can be harsh on our hands, leading to dryness, cracking, and even more serious issues like frostbite. Protecting your hands is crucial for comfort and s...
Read More
While BMI can be a useful screening tool for populations, relying solely on this single number to define an individual's health and dictate weight management strategies is outdated and often misleading.
Read MoreWhen you need local health information from a trusted source, turn to the CHI Health Better You eNewsletter.