Non-Nano Zinc Oxide Sunscreen: Your Skin Deserves it
Your skin is your body’s largest organ, and it deserves the best protection against the sun. With so many sunscreen options available, it can be hard to know which is truly best. A good place to start is by looking at the active ingredient - that’s what actually provides the protection. Most sunscreens rely on synthetic chemicals that absorb UV rays, while natural mineral sunscreens use zinc oxide or titanium dioxide to physically block them.
Synthetic chemicals
Oxybenzone, Octinoxate, Homosalate, Avobenzone… these are some of the most common ingredients used in sunscreens sold in New Zealand. Unfortunately, all have been linked to hormone disruption and skin allergies, and none are currently classified by the FDA as “Generally Recognized as Safe and Effective” (GRASE) ingredients.
They work by absorbing UV radiation after it has entered your skin cells, then converting it into heat and releasing it. To do this, they must penetrate the skin, which can be problematic for babies, sensitive skin, or anyone prone to irritation.
Zinc oxide - nature’s sunscreen
Zinc oxide is a natural mineral compound that sits on top of the skin and forms a physical barrier, scattering and reflecting UV rays. Unlike chemical sunscreens, it doesn’t need to penetrate the skin to work, providing broad-spectrum protection from the outside in.
Why zinc oxide is so effective:
✅ Broad-spectrum: Protects against both UVA and UVB rays, reducing the risk of sunburn and long-term skin damage.
✅ Gentle on skin: Non-irritating and soothing, perfect for sensitive skin, eczema, or rosacea.
✅ Immediate protection: Works as soon as you apply it - no waiting 20 minutes like chemical sunscreens.
Particle Size Matters
Many natural sunscreens use nano zinc oxide, processed into ultra-fine particles (smaller than 100 nanometres). The benefit is that it blends in more easily and leaves less of a white cast. However, research raises concerns that these nanoparticles may penetrate the skin barrier, especially if the skin is damaged, and potentially enter skin cells — something you don’t want.
There’s also concern about inhalation of nanoparticles in spray or powder sunscreens, which may reach the lungs and cause irritation or oxidative stress.
That’s why non-nano zinc oxide sunscreen is the safer choice. It stays on the surface of the skin, providing reliable, chemical-free sun protection without the worry of absorption or inhalation.
Sunscreens and the sea
Sunscreen ingredients can also affect the environment. Chemical filters like oxybenzone and octinoxate are toxic to coral reefs and marine life, which is why they’ve been banned in places like Hawaii and Palau. Even nano-sized mineral particles may harm aquatic ecosystems.
By choosing a reef-safe, non-nano zinc oxide sunscreen, you’re protecting both your skin and the planet. Keep in mind: there are few rules governing the term “reef-safe”, so always check the ingredient list before using.
What about titanium dioxide?
Titanium dioxide is another mineral sunscreen ingredient. While it reflects UV rays and offers some protection, it mainly blocks UVB and only part of the UVA spectrum - the type responsible for aging and long-term skin damage. That’s why zinc oxide remains the gold standard for full broad-spectrum protection. Titanium dioxide can be useful in combination formulas but doesn’t provide the same level of protection on its own.
The Happy Horizons difference 🌞
At Happy Horizons, we make sunscreen the way it should be - with 100% natural, non-nano zinc oxide and skin-loving organic ingredients. No harsh chemicals, no hidden risks, and completely reef-safe. Just effective, gentle sun protection you can trust for your whole family.
✨ Ready to try it for yourself? Protect your skin the natural way with Happy Horizons sunscreen: happyhorizons.co.nz/products/sunscreen