A customer using my face moisturizer has asked if I can add sunscreen to it. My research tells me zinc oxide would be the best. Anyone had experience with this?
I'd advise against it. Sunscreen is classified as a drug and you'd have to undergo all sorts of expensive testing to market it. I would also be concerned about liability if it doesn't work as anticipated.
Related, I have a little white kitty who had white eartips that were mostly bald. We're out in the country and on acreage she's safe on, she adores being outside, and despite all the well-meaning advice about keeping kitties inside, she would just die if she were confined inside, and I won't do that to her. She developed, as expected, sun-induced lesions on her eartips, and vets and I decided to be proactive and have her eartips removed. Regardless, they suggest sunscreen on her ears. She'll lick it off, as she always does. I'm loath to use sunscreen full of chemicals on her. I know how much cats are sensitive to ingredients, notably EOs, wouldn't think of using those. Feeling totally stuck, thinking I might try researching edible carrier oils for cats, and adding zinc oxide. Totally bad idea? Maybe a little bonnet?
ETA: Sounds like zinc oxide is poisonous to cats, I won't be trying that
Does anyone know % to add? I'm now in the same boat of having to "coat" my boyfriend who is developing vitiligo and hates using commercial products. He will use what he calls my coco puffs lotion, coffee scented Brazil nut body whip. I want to add titanium dioxide or zinc but need to know how much to hit @ SPF 15 ish. No reason to test if it's never leaving my house!
Unfortunately boyfriend has vitiligo and seems to be killing off melanocytes by the 1000 daily to the point he's got circles of white patches in his beard hair. I'm type 1 skin so I'm equally neurotic about skin cancer. I glow in the dark.
Dahlia, are you using zinc or TD?
the instructables website has an example on rates of usage. but let's say your 50g of finished lotion, and you want >20SPF, using non-micronized zinc, you put in 12.5g of zinc (50g * 25%). does that make sense?
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