Blue Lizard sunscreen is not non-nano. The company’s mineral formulas contain nanometer-sized particles of both zinc oxide and titanium dioxide, according to product documentation published through the National Nanotechnology Coordinated Infrastructure. If you’re specifically looking for a non-nano mineral sunscreen, Blue Lizard is not one of them.
What “Non-Nano” Actually Means
The term “non-nano” refers to the size of the mineral particles used as active sun-blocking ingredients. In the European Union, a nanomaterial is defined as having particles with a median diameter below 100 nanometers. Non-nano particles are larger than that threshold. For context, the EU’s Scientific Committee on Consumer Safety considers “fine” (non-nano) zinc oxide to have particles around 291 nanometers in diameter, while nano-sized zinc oxide typically has a median diameter between 30 and 55 nanometers.
The United States doesn’t have a formal regulatory cutoff that separates nano from non-nano in sunscreens the way the EU does, which is part of why labeling can be confusing. Brands can use terms like “non-nano” voluntarily, but there’s no FDA enforcement behind the claim. When Blue Lizard describes its particles as nanometer-sized, it’s being straightforward about what’s in the bottle.
Why Blue Lizard Uses Nano-Sized Particles
Smaller mineral particles spread more evenly on skin and leave less of a visible white cast. Blue Lizard’s Sensitive Mineral Sunscreen contains 8% titanium dioxide and 10% zinc oxide, both at nano scale. User reviews on the brand’s own site frequently note that the sunscreen absorbs quickly without leaving a white film, which is a direct result of those smaller particle sizes. Larger, non-nano particles reflect visible light more noticeably, creating the chalky look that many people find unacceptable for daily wear.
This is essentially a tradeoff. Non-nano formulas tend to leave a heavier white cast but appeal to people who want to avoid nanoparticles for personal or environmental reasons. Nano formulas look better on skin but raise questions for those same consumers.
Why Some People Want Non-Nano
The concern around nano-sized mineral particles comes from two directions: skin absorption and environmental impact.
On the skin side, some consumers worry that particles small enough to be measured in nanometers could penetrate deeper into the body. The existing research on zinc oxide and titanium dioxide nanoparticles in sunscreen generally shows they stay in the outermost layers of intact skin and don’t reach living tissue underneath. Damaged or broken skin is a different story, which is why some people with conditions like eczema prefer non-nano formulas as a precaution.
On the environmental side, concerns center on what happens when sunscreen washes off into waterways. Nano-sized zinc oxide and titanium dioxide particles have shown some toxicity to aquatic organisms in lab settings. Blue Lizard’s mineral-only formulas (like Sensitive) don’t contain oxybenzone or octinoxate, the two chemical filters most commonly restricted in reef protection laws. But “reef safe” and “non-nano” are separate questions, and Blue Lizard doesn’t carry a reef-safe certification.
Blue Lizard’s Product Lines Vary
Not every Blue Lizard sunscreen is purely mineral. The Active Mineral formula, for example, contains octisalate (a chemical filter) at 5% alongside titanium dioxide at 5.36% and zinc oxide at 10%. If you’re shopping Blue Lizard specifically for a mineral-only formula, the Sensitive and Baby lines are the ones to look at. But across the board, the mineral ingredients in Blue Lizard products use nano-sized particles.
If non-nano is a firm requirement for you, you’ll need to look at brands that specifically label their zinc oxide or titanium dioxide as non-nano and list particle sizes above 100 nanometers. Several smaller mineral sunscreen brands market themselves this way, though expect a more noticeable white cast and thicker texture as part of the package.