Zinc Sunscreens: Nanoparticles & Non-Nano
When choosing a sunscreen, it’s important to understand terms like nano, non-nano, chemical, and mineral. This post will explain these terms, why they matter, and why SunShield+ uses non-nano zinc oxide in our formulas.
What is Zinc Oxide?
Zinc oxide is a mineral that provides broad-spectrum protection by scattering, reflecting, and absorbing UV radiation. It is one of the two ingredients the FDA classifies as “Generally Recognized as Safe and Effective” (GRASE) for sun protection. Zinc oxide is highly effective against both UVA and UVB rays, making it the gold standard for sun protection.
Nano vs. Non-Nano: What’s the Difference?
- Nano Zinc Oxide consists of particles smaller than 100 nanometers. These tiny particles can penetrate the skin and potentially enter the bloodstream.
- Non-Nano Zinc Oxide has larger particles that remain on the surface of the skin, forming a protective barrier without entering the body.
Why Non-Nano Zinc?
The primary benefit of non-nano zinc is that it stays on top of the skin, forming a physical block against UV rays, without the risk of being absorbed into your bloodstream. Studies suggest that nano-sized particles may penetrate deeper into the skin, potentially leading to health concerns. In my opinion (Skyler, SunShield+ founder), using nano zinc defeats the purpose of mineral-based sunscreen, which is meant to act as a surface-level barrier. This is why SunShield+ only uses 25% non-nano, non-coated zinc oxide to ensure safe, effective protection.
What’s the Difference Between Chemical and Mineral Sunscreens?
Chemical sunscreens (such as avobenzone or oxybenzone) absorb UV radiation at the molecular level. The downside is that these molecules are small enough to enter your bloodstream, and studies show they can stay in the body for weeks after a single use. This raises concerns about their long-term effects.
Mineral sunscreens like non-nano zinc oxide create a physical barrier that reflects UV rays. They stay on the surface of your skin and wash off easily. This is why we at SunShield+ call chemical sunscreens blood barrier-breaching sunscreens—they enter the bloodstream, while mineral sunscreens like zinc stay on the skin’s surface.
Did you know? A 2020 FDA study revealed that chemicals like oxybenzone were detected in the bloodstream for up to 21 days after a single application of chemical sunscreen!
Why Not Use Titanium Dioxide?
Titanium dioxide is another mineral used in sunscreens, but it only protects against UVB and partial UVA rays. While it’s a valid option for UVB protection, it doesn’t provide complete broad-spectrum coverage. Zinc oxide, on the other hand, protects against both UVA and UVB rays, making it a superior choice for full sun protection.
Do Some Zinc Sunscreens Use Coated Zinc?
Yes, many brands coat their zinc oxide with ingredients like triethoxycaprylylsilane to improve the formula’s feel and stability. At SunShield+, we don’t use coated zinc. Our formula is as clean and natural as possible: non-nano, non-coated zinc oxide without stabilizers or unnecessary additives.
What Does SunShield+ Think About Chemical Sunscreens?
At SunShield+, we’re concerned about the potential risks associated with chemical sunscreens, especially their ability to enter the bloodstream. Research has shown that chemical sunscreen ingredients, such as oxybenzone, can remain in the body for extended periods. While it’s important to protect your skin from burns, we believe that mineral sunscreens are the safer, more natural choice.
Potential Risks of Chemical Sunscreens:
- Bloodstream entry: Chemicals like oxybenzone have been found in the bloodstream weeks after application.
- Skin irritation: Some people experience sensitivity or allergic reactions.
- Not safe for babies: Chemical sunscreens aren’t recommended for infants.
- Environmental harm: Chemical ingredients like oxybenzone are known to damage coral reefs and disrupt aquatic ecosystems.
Did you know? Studies show that 96% of Americans have oxybenzone in their bloodstream, linked to the widespread use of chemical sunscreens!
What Are the Risks of Mineral Sunscreens?
- Inhalation risk: Inhaling zinc oxide or titanium dioxide particles (common in spray or powder sunscreens) can pose a risk to the lungs. It’s safest to stick with creams or lotions.
SunShield+ Highlights:
- Non-Nano Zinc Oxide (25%) for broad-spectrum protection that stays on the surface of your skin without entering the bloodstream.
- Iron Oxide: Added to tint the formula, eliminating the white cast and providing blue light protection.
- 4 Tints Available: Our tinted formulas not only protect but also enhance the appearance of your skin, covering blemishes and providing a smooth finish.
- No Coated Zinc or Stabilizers: We use non-nano, non-coated zinc oxide without unnecessary additives, ensuring a clean and effective product.
- Sustainable Packaging: SunShield+ uses recyclable packaging and reef-safe ingredients to protect your skin and the planet.
Customer Reviews:
“I’ve been using SunShield+ for a few months now, and it’s the best mineral sunscreen I’ve ever tried! The tint blends perfectly with my skin tone, and it doesn’t leave any white cast.” – Sarah K.
“I love how smooth SunShield+ feels on my skin. Plus, knowing it’s non-nano zinc gives me peace of mind that it’s safe and effective.” – David P.
Call to Action:
Ready to make the switch to safer, non-nano zinc sunscreen? Try SunShield+ today for complete protection and complexion-enhancing benefits. Explore our tints and find the perfect match for your skin tone. Shield Your Skin!
Citations:
- FDA GRASE Classification for Sunscreens
- FDA Study on Sunscreen Absorption
- Nanoparticle Penetration and Health Concerns
- Chemical Sunscreen and Reef Damage
- Inhalation Risks of Zinc and Titanium Dioxide
https://docs.google.com/document/d/1R6P0dfJCdHZVNH6wGyR5h1Q5Dl8EcNFNY93bWLg1b5U/edit?usp=sharing