Beauty inspo Josh Rosebrook has just published a brilliant article on The Best Sunscreen - Understanding Zinc Oxide SPF and The Nutrient Day Cream. We just had to share it with you....
THE BEST SUNSCREEN - UNDERSTANDING ZINC OXIDE SPF AND THE NUTRIENT DAY CREAM by Josh Rosebrook.
Sunscreen - always a hot topic and an absolute must for anyone serious about skin care. Spring, summer, fall and yes, WINTER - damaging UVA rays penetrate weather and cloud cover - and whether you live in a city or in the countryside, you need it. There is no city in the world where buildings block all the sun on every single corner or street - and all exposure adds up and contributes to the decline of the skin.
With so many highly questionable and proven unsafe, synthetic sunscreen ingredients on the market - Zinc Oxide is a savior. Zinc Oxide is the premier natural, mineral sunscreen ingredient on the market today. Safe, effective and broad spectrum, non nano Zinc Oxide physically blocks harmful, damaging solar rays. The mineral deflects rays to help protect and prevent accelerated deterioration of the skin and slow the appearance of age in the skin. Synthetic chemical sunscreens like Homosalate, Octisalate, Octocrylene, Avobenzone, Oxybenzone, and Octinoxate, perform differently - they absorb solar rays and have been linked to hormone disruption, which can cause cancer.
When looking for a quality sunscreen, I often hear people ask what the percentage of Zinc Oxide is in a particular formula. Even when the product already states having a high SPF rating. Why? There is a misconception that more Zinc Oxide in a product will deliver higher level of UV protection and it just isn’t true. It’s not that simple.
Percentage of Zinc Oxide in a product does not equate to higher or lower SPF or more or less UVA protection.
SPF measures UVB rays only - the damaging rays that burn and age skin. UVA rays are responsible for skin damage but they do not cause sun burn. UVA rays are the ones that make their way through the clouds in the sky and your windows and cause skin damage.
UVA protection is not given a number or a rating to measure it’s ability to protect against UVA rays. A products ability to guard against UVA rays is either approved as meeting the minimum requirement for blocking a high percentage of the UVA rays, which concludes it Broad Spectrum, or not.
I’ve witnessed a few brands capitalize on and perpetuate the miseducation by marketing their higher percentage of ZO as a USP (Unique Selling Point), saying, “we have 20% zinc oxide for the most protection.” I’m not sure if they actually know this isn’t true or if they are miseducated as well.
Size of Zinc Oxide
There are many different sizes of Zinc Oxide each require varying percentages necessary to make the sunscreen product effective and reach a specific SPF. And It’s the proper FORMULATION that allows or disallows Zinc Oxide to disperse properly on the skin and allow it to become or not become a specific, effective SPF rating. It’s also the proper formulation that allows Zinc Oxide to stay blended properly in the bottle and remain stable, which again, will contribute to whether the product will or will not be dispersed effectively on the skin, protect properly, and be a specific SPF rating.
Coated Zinc Oxide
Zinc Oxide can also be treated with Silicones. Dimethicone/silicone coated Zinc Oxide, which isn’t biodegradable and harms the environment, ecosystems and animals, is used in products to make the Zinc Oxide less reactive and easier to mix/blend into formulations. We do not use coated Zinc Oxide.
Testing sunscreen products
There are different levels and costs to clinically screening and testing effectiveness of an SPF that is required by the FDA. What a brand can claim on a label can require additional testing and each country has their own SPF regulations.
The FDA doesn’t test sunscreen products! Brands are required to have their SPF products tested by an FDA registered, state certified lab and submit the results to the FDA.
The Nutrient Day Cream SPF 30
Our Nutrient Day Cream with SPF 30 contains 12% non nano, uncoated, high micron, large particle Zinc Oxide. In certified lab testing for FDA approval, our Nutrient Day Cream with SPF 30 actually averages SPF 37 in these lab tests. Our Nutrient Day Cream SPF 30 and Tinted have been thoroughly evaluated by FDA certified, state registered lab facility - and have passed all UVA and UVB SPF 30 protection requirements. They are ‘Broad Spectrum' approved and exceed the minimum requirements necessary for all tests.