What Is Micronised Zinc?

For over a year we’ve been working with a world leader in zinc sunscreen technology to develop Baby Mineral Sunscreen SPF 50+ (now available!), a breakthrough mineral/zinc only sunscreen, able to achieve its broad spectrum SPF 50+ rating due to new, micronised zinc technology.

So, what is micronised zinc? 

Zinc oxide has been used in sunscreens for many years. In the past, zinc oxide based sunscreens have been known to be heavy or sticky and leave a white cast on your skin. Thanks to constantly evolving technology, zinc oxide has become available in a ‘micronised’ form, meaning it is clear on application, lightweight and non-greasy. 

You may have heard the term ‘nano’ when referring to zinc oxide. Nano zinc and micronised zinc refers to the size of the zinc oxide particles used in your sunscreen. Nanoparticles are clusters of zinc oxide where the total size is about 100 nanometres across. Micronised particles are 10 times this size, and are made by mechanically pulling apart big clumps of zinc oxide, otherwise known as 'aggregates' and using filters to get the size required. That is, so particles too small (nano) or too big (aggregates) can be removed. 

Why is this important?

Firstly, there is some scepticism around the possible absorption of nano zinc particles through the skin and into the bloodstream, essentially because they are so small. The TGA has not found any scientific evidence associating these particles to cause harm when used as ingredients in sunscreen. Even Nanoparticles are either found to not penetrate the skin at all or minimally penetrate, making toxicity highly unlikely(1)Micronised zinc particles, which are much larger, will not penetrate human skin. Please note, We Are Feel Good Inc. continuously monitors scientific research into the study of zinc oxide used in sunscreen.

Secondly, traditional zinc sunscreens use large clumps of zinc called ‘aggregates’. These big clumps are very good at absorbing UVA and UVB rays and preventing damage, however due to their size, they reflect a lot of visible light and give your skin a white cast appearance. Smaller, nano-sized particles appear clear on the skin, but are less effective at absorbing UVA light, thus causing skin ageing and skin cancers.

Micronised zinc particles are somewhere in between. They are excellent UVA absorbers (meaning high protection) AND still appear clear on the skin. 

Our all new Baby Mineral Sunscreen PF 50+ has been made using micronised zinc technology, formulated specifically with baby's gentle skin in mind. This lightweight sunscreen provides maximum UVA & UVB protection and is suitable for all skin types. It's enriched with natural emollients for extra hydration and nourishment and is fragrance, paraben, PABA, oxybenzone and octinoxate free. Check it out online here!