We've all heard the mantra: wear sunscreen to protect your skin. But recent research has uncovered a twist in this sun-safety tale.
For years, we've known that many products contain PFAS chemicals – synthetic compounds used for their water and stain-resistant properties. These "forever chemicals" are found in everything from non-stick cookware to waterproof clothing, even in some skincare products. But until now, we've been in the dark about how much of these substances get absorbed through our skin.
Let's break down the latest findings and what they mean for your skincare routine.
Scientists recently conducted a study changing how we think about skin absorption. They looked at 17 different PFAS chemicals found in many products, including some sunscreens and cosmetics. Using a 3D human skin model, they tested how much these chemicals penetrate our skin barrier.
It is the first time we've had a clear picture of human dermal uptake of PFAS, and the results are eye-opening.
Here's what they found:
- Size matters: Shorter PFAS chemicals are more easily absorbed. For example, perfluoropentanoic acid (PFPeA) and perfluorobutane sulfonate (PFBS) had the highest absorption rates at 58.9% and 48.7%, respectively. That's more than half of what's applied!
- The longer, the better (sort of): As the carbon chain in these chemicals gets longer, less is absorbed directly into the bloodstream. But here's the catch – it doesn't just disappear.
- Skin deep storage: Longer-chain PFAS (those with nine or more carbon atoms) might not enter your bloodstream directly, but they don't just wash off either. A significant amount ends up stored in your skin tissue.
- It's all about chemistry: The study found that how easily a PFAS is absorbed correlates with its water solubility. The more water-soluble, the more likely it is to be absorbed.
You might think, "Great, but what does this mean for my daily sunscreen application?"
- Not all sunscreens are created equal. Some contain PFAS chemicals, while others don't. It's worth taking a closer look at the ingredient list on your favorite brand.
- Absorption doesn't equal harm: While this study shows that these substances are absorbed, it doesn't automatically mean that they are causing damage. Further research is needed to understand the long-term effects.
- Consider your options: Mineral-based sunscreens and other alternatives that don't contain PFAS might be worth exploring.
Taking action
Armed with this new information, here's what you can do:
- Become an ingredient investigator: Start checking those labels. Look out for anything with "fluoro" in the name – often a sign of PFAS.
- Mix sun protection: Consider using sunscreen with other sun-safety measures, such as wearing protective clothing or seeking shade during peak sun hours.
- Stay informed: This field of research is evolving rapidly. Look for new studies and recommendations.
Remember, taking care of your skin is about balance. You're now equipped with valuable information to make informed choices about your sun protection strategy. Don't let this news scare you away from exposing your skin to the sun. After all, getting out into the sun can improve your mood and overall health.
If you have specific concerns, don't hesitate to chat with a well-educated, holisticly oriented healthcare provider. They can help you navigate these new findings and find the best approach for your unique skin needs.
Here's what I do for sun protection.
- I spend a lot of time in the sun (walking, gardening), but I rarely use sunscreen, and when I do – I use the "Badger" mineral (non-nano) zinc oxide product. (By the way, I do not receive any financial compensation for telling you this)
- Instead, I use "Prodigal Sun" - before and after sun serum every morning and reapply it during the day if I need to stay in the sun longer than planned.
- Keep in mind that I consume lots of antioxidants daily, which gives me natural protection, and I take an Astaxanthin supplement in summer.
- If I plan to be in the sun for an extended time and need extra protection, I always wear a hat and long-sleeve shirt to get some relief.
Sources for this article include: