What Does 100% Mineral Sunscreen Actually Mean?

How to read your label and know exactly what you're putting on your skin.

Walk into any pharmacy or beauty store and you'll see the word "mineral" on a lot of sunscreen packaging. It's become a buzzword - shorthand for natural, clean, skin-friendly.

But here's the thing. Not every product that calls itself mineral actually is one. And your skin deserves to know the difference.

How sunscreen actually works

There are two types of UV filters used in sunscreen - physical and chemical. They both protect your skin from UV damage, but they work in completely different ways.

Physical (mineral) filters - zinc oxide and titanium dioxide - sit on top of the skin and act like a shield, physically deflecting and scattering UV rays before they can penetrate.

Chemical filters - ingredients like ingredients like Homosalate & Octocrylene  are absorbed into the skin, where they convert UV rays into heat and release it.

Neither is the enemy. But they work differently, they feel different on skin, and you deserve to know which one you're wearing.

So what makes a sunscreen truly mineral?

A true mineral sunscreen uses only physical UV filters. Zinc oxide and/or titanium dioxide - and nothing else — listed as the active ingredients.

That's it. That's the standard.

The problem is that some products market themselves as "mineral" or "natural" SPF while still containing chemical UV filters alongside zinc or titanium. That makes them a hybrid formula - not a true mineral sunscreen, regardless of how they're labelled.

How to check your label

Flip your product over and look at the active ingredients section - not the full ingredients list, the actives specifically.

Zinc oxide and/or titanium dioxide only = true mineral sunscreen

Anything else listed as an active UV filter alongside those = hybrid formula, not fully mineral

It takes ten seconds and it tells you everything.

Why we use non nano zinc oxide only

Our formulas use zinc oxide as the sole active UV filter. Always have, from day one.

We chose zinc oxide because it offers broad spectrum UVA and UVB protection, it sits beautifully on skin, and it's one of the most well-tolerated UV filters available - even for sensitive skin.

We're not here to be anti anything. Chemical sunscreens have their place and plenty of people wear them happily. But we made a choice about what we believe in, and we think you deserve full transparency about what's on your skin.

Because informed skin is protected skin. And that's always been the goal. 

 SHOP 100% mineral sunscreen https://solsistacollective.com/products/butta-block-mineral-spf50