Science behind safe and natural sunscreen


A study released in January of 2017 from the Australian TGA (Therapeutic Goods Administration) concluded the zinc nano does not get absorbed into the skin and stay in the outer dead layer of the skin. These NPs are particularly useful in sunscreens because of their intrinsic ability to filter ultraviolet (UV)A as well as UVB wavelength spectra, thus providing broader protection than any other sunscreen agent. More details at:

Paramount importance is the finding that the vast majority of studies do not demonstrate NP skin penetration; the current weight of evidence suggests that TiO2 and ZnO NPs do not reach viable skin cells (even in the compromised skin) or the general circulation, but rather remain on the skin surface and in the outer layer of the stratum corneum, a surface layer of non-viable, keratinized cells. It is therefore highly likely that if sunscreens are used as is intended, NPs from sunscreens applied dermally will not achieve significant concentrations in the systemic circulation.

Brooke Houia - Ms Universe New Zealand Contestant

Caithy Organics has created the Natural Sunblock 50+   

Short Description:  

Broad Spectrum. UVA + UVB Protection. AS/NZS -2604:2012
No Artificial Fragrance. No Animal Testing. No Harmful Chemicals


  • Made in NZ from Natural Ingredients
  • Perfect for all skin types, even the most sensitive
  • Pohutukawa & Kiwi seed extract

Full Description:  

At Caithy, we believe that nature provides all the goodness that our skin needs. Using the plant-based highest grade ingredients we have researched & formulated all their products to maximize the goodness of nature to create effective & natural skincare. All of our products are made in NZ using quality sourced ingredients from ethical NZ suppliers.

This product contains absolutely:
NO Parabens
NO Synthetic Fragrance
NO Alcohol
NO Artificial Colours


Apply liberally & evenly to all exposed skin 20-30 minutes prior to sun exposure. Re-apply every 2 hours and after swimming or sweating.  Limit sun exposure. Use sunscreen regularly and protective clothing: wearing long-sleeved shirts, pants, hats, and sunglasses.

Caithy's Natural Sunblock is the best choice for sensitive skin. Enriched with NZ native Pohutukawa and Kiwi seed extract provide nourishing & restorative hydration

Check out more skincare products made in New Zealand from natural and organic ingredients.