Sustainable Sun Protection with Lepaar: Non-Nano uncoated Zinc-Oxide

Non-Nano Uncoated Zinc Oxide

A Dive into Sustainable Sun Protection with Lepaar

In the world of sun protection, there’s been a surge in the adoption of non-nano, uncoated Zinc Oxide. This shift in preference is led by innovative brands like Lepaar, renowned for integrating this ingredient into their ‘Elemental Day Silk’ composition. Here, we delve deeper into the subject, discussing non-nano versus nano zinc, the photo-reactivity of zinc, and the difference between uncoated and coated zinc.

Non-Nano vs. Nano Zinc

There exists a myriad of scientific articles asserting that nano particles of zinc oxide used in ‘invisible’ Zinc sunscreens do not get absorbed into the skin, do not enter the bloodstream, and supposedly do not pose a threat to human health unless inhaled from spray or powder. However, the environmental impact of nano particles of zinc oxide and titanium dioxide cannot be overlooked.

When washed into waterways from our skin, these particles can dramatically affect marine life. The suspended nanoparticles can alter the temperature, salinity, and pH of our oceans. They infiltrate the food chain, deposit in sediment, permeate micro plankton, and react with sunlight to generate cell damaging oxidative stress in sensitive marine organisms. The use of non-nano zinc oxide, although may not yield a completely clear finish, is a step towards more sustainable sun protection, prioritizing marine health over aesthetics.

Zinc and Photo-Reactivity

When exposed to UV light, zinc oxide, whether nano or non-nano, exhibits minor photo-reactivity as it absorbs UVA/UVB. Non-nano zinc, unlike its nano counterpart, remains on the dead outer layer of the skin, so this photo-reactive process doesn’t affect the living cells below. Compared to the surprisingly government-approved active ingredients in chemical sunscreen or Titanium oxide, the rate of reactivity is quite low.

The naturally potent antioxidant properties of seed oils, fruit oils, and whole botanical extracts can counteract this minor reactivity. Their rich composition of antioxidants such as vitamins (vitamin C, vitamin E in particular), flavonoids, and phenolic acids effectively absorb, resist, and block UVA/UVB rays without side effects. These natural elements combat free radicals that can cause sunburn, wrinkles, lower immunity, premature aging, and cancer, making them the real heroes in natural sunscreens.

Uncoated vs. Coated Zinc

Many sunscreens feature zinc oxide particles coated with an inert substance, often to reduce reactivity to sun exposure and facilitate better mixing with other ingredients. One common coating substance is Dimethicone, a lab-made silicone oil used widely in non-natural skincare and shampoos. Although Dimethicone can enhance product spreadability and fill in fine lines and wrinkles on the face, its potential negative impacts are worth noting.

A layer of plastic-like Dimethicone on your skin can trap bacteria, sebum, impurities causing breakouts, inflammation, and blackheads. It can interfere with your skin’s normal functions like sweating, temperature regulating, and dead skin cells sloughing. Moreover, it’s listed as a potential skin and eye irritant, and prolonged exposure to it can increase skin irritation. People with sensitive or reactive skin may risk an allergic reaction. Plus, Dimethicone is non-biodegradable.

With these potential drawbacks in mind, brands like Lepaar choose uncoated zinc oxide for their products.


Embracing non-nano, uncoated Zinc Oxide in sun protection is a forward-thinking step towards sustainability and skin health. Brands like Lepaar, integrating this ingredient into their formulations, exemplify a commitment to both the environment and skin integrity. It may take some

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