![]() ![]() It’s even more complicated than that because it’s not just the size of the particles but these particles tend to stick together to form clumps or aggregates which affect how well the zinc scatters UV rays. Zinc oxide powders are sold with different particle sizes and the size of the particle impacts how well the zinc screens out UV rays. ![]() Both have to use USP grade which means they have to meet certain purity requirements.īTW did you know that, being a natural product, zinc oxide contains somewhere between 1 and 10 ppm of lead? In classic Beauty Brains fashion, the answer is yes and no. Let’s begin by answering a fundamental question: is the zinc oxide used in diaper creams the same as the zinc oxide used in sunscreens? But does that mean you could use them interchangeably? Can you use diaper cream as a sunscreen as the demanding gentleman in Mari’s pharmacy intended to do.Īnd conversely, can you use sunscreen on diaper rash? ![]() So Zinc Oxide is an approved drug ingredient that is used in both products. That’s what makes it suitable for use in the 4 drug product categories we just mentioned. How does ZnO help with diaper rash? It works 3 ways: It helps water proof (or feces proof) skin, it’s a mild astringent which means it can cause the contraction of body tissues, and it has some antimicrobial properties. In addition to Zinc Oxide other approved diaper rash ingredients include mineral oil, petrolatum, cornstarch, allantoin, calamine, dimethicone, kaolin clay, and cod liver oil. But diaper rash creams are actually not 1…not 2…not 3 but actually 4 different types of drug products: External Analgesic, Topical Antifungal, Topical Antimicrobial, and Skin Protectant. Sunscreens are 1 type of drug…they are sunscreens. In case you didn’t know, both sunscreens and diaper creams are Over the Counter drugs and are controlled by the FDA. So mark your calendars that today was the day that the whole urine-diaper rash myth was busted.Īnd that brings us back to diaper rash creams. This contact can lead to yeast and bacterial infection. The pH of feces is acidic due to bile and studies have shown that diaper rash is more prominent where the feces contact the skin. But it turns out urine is NOT the primary cause…it’s feces. We used to think that urine was the primary cause of diaper rash which makes sense since a baby (especially under 2 months) can urinate up to 20 times per day. But the hypothesis was that urine releases ammonia which raises the pH of skin which opens it up to damage. So a little quick background discussion is in order. We’ve talked quite a bit about sunscreens on the showgram but believe this is the first time that diaper rash products have come up. Although this is sometimes true, depending on the brand, my concern is that (a) the formulation of a diaper rash paste might not make it an effective sunscreen and (b) without a listed SPF, there’s no way to really know. His rationale was that diaper rash paste has a higher percentage of zinc oxide than zinc oxide sunscreens. I tried to steer him in the direction of actual sunscreens with listed SPFs, but he was not to be dissuaded and ended up leaving with a tube of generic diaper rash cream (with no listed SPF) in hand. Mari asks…Today a customer came into the retail pharmacy where I work and demanded that we sell him zinc oxide diaper rash paste so he could use it as sunscreen. Can you use diaper rash cream as sunscreen? ![]()
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