Zinc oxide forms cement-like products when mixed with a strong soln of zinc chloride or with phosphoric acid, owing to the formation of oxy-salts; When ointments containing zinc oxide and water were melted and exposed to UV light, hydrogen peroxide was produced, in the case of fatty ointments containing cholesterol, amt of hydrogen peroxide was less and the cholesterol was partly oxidized. For more severe levels of sun sensitivity, it appears to work better to use sunscreens with a higher percentage of zinc oxide (16-25%). Micronized zinc oxide appears to be a better UVA filter than micronized titanium dioxide so, given a choice, opt for zinc. For more severe levels of sun sensitivity, it appears to work better to use sunscreens with a higher percentage of zinc oxide (16-25%). Look for a sunscreen that contains at least one of the following, Leffell says: ecamsule, avobenzone, oxybenzone, titanium dioxide, sulisobenzone, or zinc oxide. The problem with what you said above, is the statement that a product meets the minimum requirement for blocking a high percentage of UVA. When outdoors, sunscreen should be reapplied approximately every two hours, or as often as the label says. Zinc oxide is found in the sunscreens that are recommended by dermatologists because they don’t contain oxybenzone (a harmful chemical), which is very common in most other sunscreens. Let’s look at some ambiguous scenarios you may come across. A handful of products combine zinc oxide with chemical filters. Copyright © 2013-2020 Just About Skin. Any sunscreen with zinc or titanium will do, but at the right percentage. There are endless polemics regarding how much is too much zinc oxide in sunscreen. However, if protecting the environment is one of the reasons you’re thinking to switch to biodegradable sunscreen, know that nanoparticles smaller than 35nm can be toxic to marine life. ( source ) I don’t know that I’d avoid titanium dioxide with as much vehemence as I avoid oxybenzone, for example, but pure zinc oxide sunblocks are probably the best choice. However, this is far from the truth. You've probably heard the term "zinc oxide" thrown around a lot recently, and it's for a good reason. 25% is the legal maximum. Mineral sunscreens use zinc oxide and/or titanium dioxide. I was wondering how you would respond to what I just now read: "When looking for a quality sunscreen, I often hear people ask what the percentage of Zinc Oxide is in a particular formula. Brand B: 7% Zinc Oxide + 8% Titanium Dioxide. This should not surprise you, as lower concentrations require lower raw material costs. A hybrid of the two (a zinc oxide and titanium dioxide sunscreen) is suitable, but physical sunscreens that rely purely on titanium dioxide should be used sparingly. Let’s take a look! What percentage of zinc oxide should be in sunscreen? Details: This sunscreen from COOLA contains 3.2 percent titanium dioxide and 7.0 percent zinc oxide. 10 10 Ex- I just bought a SPF 50 Australian sunscreen with 4% zinc oxide and 4% titanium dioxide. How To Choose Products For Irritated Eyes, Irritated Eyes? how it has been manufactured, performance ingredients in the formula). Zinc oxide is defined as a physical blocker of UV rays. Zinc Oxide is the premier natural, mineral sunscreen ingredient on the market today. Studies show it’s safe, with no evidence of skin penetration, even after repeated use. Due to their extremely small size, these particles may generate oxidative stress and potential cellular damage to corals, juvenile fish, and invertebrates. It is not irritating and compatible with sensitive skin. Yikes zinc oxide containing sunscreens (3-10% zinc oxide) appear to work ok for general application. Zinc oxide (ZnO), the most ionic of the wurtzite semiconductors, finds major applications in catalysis and as variable resistors. This is a safer alternative to your traditional sun protection, as it is known for its healing properties. It is the only one of its kind recognized by the Food and Drug Administration (FDA) as a Category I skin protectant. This active compound present in biodegradable sun lotions sits on your skin and forms a protective barrier against the harmful rays. My personal rule of thumb is: choose the formula that offers a higher percentage of Zinc Oxide. That’s why most cosmetic brands use mined zinc to produce purified zinc oxide in their laboratories. EleVen by Venus On-the-Defense Sunscreen SPF 30 contains the highest possible concentration of zinc oxide, 25 percent, in a silicone-free and … As a single ingredient, zinc oxide is the broadest range sunscreen on the market. For example, the lotion I use as the base for this sunblock is about 8-10 oz (let’s say 9 for this example). I think this is good, but am not 100%. This is a great reason to stick with physical sunscreens that use zinc oxide. They go to work instantly, and won’t irritate skin (this makes them ideal for kids). To increase the SP factor of their lotions, many manufacturers use both zinc oxide and titanium dioxide as active ingredients. Your skin when exposed to UVB light produces melanin, and that is why you g… To ensure you choose the best sunscreen with zinc oxide and titanium dioxide for the largest (and very vulnerable) organ in your body, you should look for a number of must-have features in your sunscreen: If so, what is a good % to aim for? Using a sunscreen dedicated for this area, such as this one, is a good way to get the protection you need, without worrying about it running into and stinging your eyes. Anything at this level in a. Also, a formula with a higher concentration of actives is much more difficult to formulate into a cosmetically acceptable product. Same notes for Zinc Oxide apply. Besides, zinc oxide can prevent bacterial infections, and it has anti-aging properties, improving the healing of tissue damage. The main benefit of zinc oxide is its capacity to block all types of harmful UV rays, including UVA, UVB, and UVC. 25% is the legal maximum. If sensitivity occurs in the form of rash or irritation, discontinue use. Brand B: 2% Zinc Oxide + 6% Titanium Dioxide. I'm looking at Paula's Choice sunscreen and the ones I'm looking at have around 3% of both or 6% zinc oxide and 2.32% titanium dioxide, etc. Zinc is currently the only common sunscreen ingredient that blocks the entire UVA and UVB spectrum, fighting the sun’s aging affects on skin. Badger's ‘clear zinc’ sunscreen products use a specialized zinc oxide powder made of micron-sized mesoporous zinc oxide aggregates. Finally, for true protection, make sure that your sunscreen contains zinc oxide. What Percentage of Zinc Oxide Should Be In Sunscreen? Hi - does the percentage of zinc oxide and titanium dioxide in sunscreen matter? Skin cancer is the most common form of cancer in the United States, affecting more than 1 million people every year, according to the American Cancer Society. This mineral can also treat rash and skin irritation, including diaper rash. Skin allergies triggered by ointments and lotions containing zinc oxide are very rare. Snorkelsandfins.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. study that found that almost half of sunscreens (and almost 75% of natural sunscreens) did not pass tests that verified the SPF claims on their labels. If out in high risk sun situations, try to find zinc 15-20%. Scientific literature shows that particles larger than 30nm do not get absorbed into the skin nor enter the bloodstream, posing no threat to human health. You should be ensuring your sunscreen specifically contains zinc oxide. What’s important is the amount of it, known as the percent concentration. Zinc oxide is found in the sunscreens that are recommended by dermatologists because they don’t contain oxybenzone (a harmful chemical), which is very common in most other sunscreens. Z-Block sunscreen is 100% free of chemical actives, so no irritation. Regular zinc oxide also blocks visible light up to wavelengths 700 nm, whereas zinc nanoparticles block only up to 380 - 400 nm, depending on the specific formulation. Although harmful chemicals are more effective in blocking UV rays, it has been shown that minerals such as zinc oxide and titanium dioxide still effectively block the UV radiations when used in cosmetically acceptable concentrations. I'm looking at Paula's Choice sunscreen and the ones I'm looking at have around 3% of both or 6% zinc oxide and 2.32% titanium dioxide, etc. Q: How much sunscreen should I be using on my face and body? FACT. Z-Block sunscreen contains Zinc oxide- The only ingredient classified by USFDA that provides broad spectrum coverage across the entire UVB & UVA range. Zinc oxide seems to be the best sunscreen ingredient because it combines effectiveness with safety. Advantages of zinc oxide. While the total percent concentration of active ingredients is the same for both (15%), Brand A will give you more UVA protection, all other things being equal between both brands. For a higher level of protection, you’ll want add 20% of the lotions weight in zinc oxide. A lot of other sunscreens I find have 10% zinc oxide or above. For many people the zinc oxide sunscreens seem to last all day. Safe, effective, and broad-spectrum, non-nano Zinc Oxide physically blocks harmful, damaging solar rays. 3 doctors agree Many renowned brands propose biodegradable sunscreens that contain less than 10% of zinc oxide while providing an SPF of 50+, thanks to the association of this mineral with titanium dioxide. Z-Block has break through patented Index Match Technology to ensure non opaque, non whitening sunscreen experience. When outdoors, sunscreen should be reapplied approximately every two hours, or as often as the label says. For many people the zinc oxide sunscreens seem to last all day. There are no hard rules because there are other factors that determine whether a sunscreen will be effective (i.e. Zinc oxide is a natural mineral consisting of the metal zinc that has been oxidized. There are two types of UV, UVA solar radiation that causes skin wrinkling, and skin aging, and this radiation penetrates deep in the skin, but does not cause sunburns. The answer is not clear or definitive. Read on for a detailed buyer’s guide, comparison table, and in-depth reviews of the top 5 sunscreens containing zinc oxide and titanium dioxide. Zinc oxide is the only ingredient which does that. But aside from offering sun protection, there is more that you need to know about zinc oxide–this along with other interesting facts are what we’ll disclose as this article offers everything you need to know about the ingredient. All Rights Reserved. trekking in the Sahari Desert) or intense physical activity. It isn't absorbed through the skin and is considered to be a safe substance. Apply zinc oxide cream directly to the affected area, including skin suffering from a diaper rash, redness, chafing, burns, poison ivy, or skin irritation. It is used as an additive in numerous materials and products including cosmetics, food supplements, rubbers, plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, and first-aid tapes. It’s mattifying formula means you won’t look the slightest bit greasy, and because it’s made with fast-absorbing, clean zinc oxide, it won’t irritate or clog pores like chemical sunscreens . These are also good ingredients to look for in adult sunscreen. These aren’t directly related. Sunscreens that use the ingredients zinc oxide or titanium dioxide, or special sunscreens made for infants or toddlers may cause less irritation to their sensitive skin. The actual concentration depends on whether the lotion has one or two active ingredients. After that, they should not use any products with chemical blockers in them. On the one hand, you want the one that provides the MOST coverage of the UVA spectrum (UVA-1 and UVA-2). Not only is it super lightweight, blendable, vegan, non-toxic and cruelty-free, but it also protects against the skin’s three biggest threats: UV rays, blue light and pollution. zinc oxide containing sunscreens (3-10% zinc oxide) appear to work ok for general application. Any sunscreen with zinc or titanium will do, but at the right percentage. The mineral has a low overall hazard, and there are no restrictions regarding its use. Most manufacturers of biodegradable lotions use either non-nanoparticles or nanoparticles greater than 30nm in their products. In this article, we will tell you what zinc oxide is and why its presence in sunscreen shouldn’t concern you. To ensure the safety and effectiveness of nanominerals in sunscreen, the FDA should restrict forms of zinc and titanium that would provide inadequate UV protection, or that could be activated by UV rays and damage skin cells. Not a dermatologist, no disclosures either, but in med school, we learned that my university’s dermatologists preferred mineral sunscreen with either 20% zinc oxide or combo of zinc and titanium for added effect of ~20+%. From 350-400 nanometers, titanium dioxide does little to protect you while zinc oxide has you covered. Studies also suggest non-nanoparticles of zinc oxide bring no harm to plant and wildlife, including coral reefs. The more zinc the better but the highest I’ve seen (that’s cosmetically tolerable) is 18-20 percent. The protective ingredient in sunscreens is zinc oxide. This is one of the main active ingredients used in sunscreens, and blocks both UVA and UVB rays, providing broad-spectrum protection. The white patina and slightly higher cost are well worth the investment. The mineral deflects rays to help protect and prevent accelerated deterioration of the … In fact, the zinc oxide particles often leave a white patina on the skin, and that’s one of the reasons many people prefer regular lotions. When used in sunscreen it sits on your skin and forms a protective barrier against harmful UV rays. Low in titanium dioxide: While it does offer good sun protection, titanium dioxide is usually the culprit when sunscreens leave a grey or white cast, says Dr. Laughlin. This 15 percent zinc oxide sunscreen just debuted in May, but it’s quickly become a PureWow reader favorite. With microfine zinc oxide and titanium dioxide, it’s specially formulated to stay … According to a study published in the Journal of Drugs in Dermatology, zinc oxide can regulate sebum production, reduce acne associated inflammation and eventually treat acne. We have rounded up the best zinc oxide sunscreen lotions available on the market right now. Articles, images, and information on this website may not be copied, reproduced, transmitted, distributed, or printed in any form without written permission. Concentrations between 15 and 20% correspond to … My view is that, the higher the better, so long as you don’t clog your pores. Unlike the chemicals present in regular sunscreens, zinc oxide is not absorbed into the skin, and it is effective right after application. The protective ingredient in sunscreens is zinc oxide. Due to this reason, some dermatologists and cosmetic brands promoting regular sunscreens have concluded that biodegradable lotions might be ineffective. After thorough research into requirements for sunscreen using zinc oxide and titanium dioxide to be effective, SimplySunSafe recommends Vanicream Sunscreen SPF 30 as the best sunscreen using zinc oxide and titanium dioxide. 5% minimum;25% is the legal maximum. While there has been some debate regarding the safety of these particles, studies suggest they are perfectly safe to use in creams and lotions. In products such as makeup, including foundation, BB creams and facial moisturizers, the percentage (and therefore coverage) is usually lower around 10 to 19 percent. Most people don’t apply enough sunscreen, which is why undesirable sunburns and tanning can occur despite sunscreen application. FDA sunscreen rules allow any type of titanium dioxide or zinc oxide to be used in sunscreens (FDA 2011a). Because zinc oxide is a metal that’s been oxidized, sunscreens containing it, such as SolRX's SPF 50 Zinc Sunscreen and Zinc Sunscreen Face Stick, are considered mineral rather than chemical, and are therefore more natural than most of the sunscreens currently on the market. Replacing your regular sunscreen with a biodegradable one containing zinc oxide or zinc oxide and titanium dioxide is a great way to reduce skin cancer risk, lower the risk of skin allergies to sunscreen, and protect the environment. Zinc oxide cream is for external/topical use only, so be careful not to swallow any or to get it into your eyes, ears or mouth. There are no standard guidelines. If you were to randomly sample 100 sunscreens on the market today, you might be surprised by the wide range of concentrations found in formulas – from very little to the legal maximum. Choose Brand A. Tricky, eh? 3% (maximum allowed and the standard concentration used now) Don’t accept anything less than 3%. With microfine zinc oxide and titanium dioxide, it’s specially formulated to stay … Always seek the advice of your physician or qualified health provider with any concerns or questions about a persistent problem or medical condition. Titanium dioxide and zinc oxide might have complex names, but the way they protect skin is simple. It is more common to see 2-7% concentrations. Zinc oxide is defined as a physical blocker of UV rays. Just because an active ingredient is in a sunscreen doesn’t mean it can protect you sufficiently. The other type, UVB, causes sunburns! The only sunscreen safe for young children are zinc oxide and titanium dioxide, which are physical blockers. In this way, cosmetic brands have managed to reduce the concentration of both minerals and increase the UV protection factor of their sunscreens. Zinc oxide is an inorganic compound with the formula Zn O.ZnO is a white powder that is insoluble in water. This is a clear case. Best Matte Zinc Oxide Sunscreen: REN Clean Skincare Clean Screen Mineral SPF 30 Mattifying Face Sunscreen Midday shine is the worst , but that’s nothing this sunscreen can’t solve. Zinc oxide has a long history of safe use. Furthermore, zinc oxide has a wealth of additional benefits. It is a metal excess defect structure exhibiting n-type conductivity with a band-gap of 3.34 eV. I look for a broad-spectrum sunscreen that contains at least 9 percent zinc or titanium. Zinc oxide is a better sunscreen ingredient, as it offers the best UVA protection of all current sunscreen chemicals, and titanium dioxide is second best. If I want a sunscreen that’s about SPF 15, then I’ll add about 1.08oz of zinc oxide. This property has made it a key ingredient in mineral – or biodegradable – sunscreens. These particles have a porous surface texture, like a sea sponge, so they don't reflect as much visible light as standard non-nano zinc oxide particles and are therefore less whitening on the skin. It is more common to see 2-7% concentrations. Zinc oxide is known as a physical sunscreen that contains a mineral ingredient capable of protecting skin from UV rays. The only downside is the white color the product leaves on your skin upon application. However, a concentration of over 25% of zinc oxide not only is not cosmetically acceptable, but it would alter the texture of the lotion making it unpleasant on the skin. Let’s say you’re comparing that with a formula that only has Zinc Oxide. Sunscreens that use the ingredients zinc oxide or titanium dioxide, or special sunscreens made for infants or toddlers may cause less irritation to their sensitive skin. No, zinc oxide is not harmful to humans. So, if you’ve ever applied a sunscreen that left a white, powdery cast on your body, it most likely contained zinc oxide as a key ingredient. Despite a high concentration of zinc oxide (25 percent), this silky sunscreen serum(!) Before we go on and answer the question above, Zinc Oxide Sunscreen or Titanium Dioxide Sunscreen, first let’s concentrates on the question that matters more, and that is, why sunbathing can be harmful for your skin.Almost for certain, major part of the people who will read this will ignore it … I can see why I confused you on this. As a single ingredient, zinc oxide is the broadest range sunscreen on the market. When these particles aggregate into the substrate they form non-nanoparticles that stay clear when applied, so you won’t have to worry about the lotion’s whiteness. A handful of products combine zinc oxide with chemical filters. Biodegradable sunscreens containing only zinc oxide as an active ingredient provide adequate protection at concentrations above 15%. You might hear differing opinions from other professionals. I turn the sunscreen over and look at the zinc percentage. In an attempt to safeguard marine life and protect coral reefs, many manufacturers of skin care products have started to launch their lines of biodegradable sunscreen. Zinc Oxide: 5% minimum; 10-20% is ideal. Zinc oxide is one of the main active ingredients in these lotions, and the questions arise spontaneously: what is zinc oxide? Babies shouldn’t wear sunscreen until they are six months old. Percentages of zinc oxide vary widely, and the final percentage will determine the products specified “SPF” level. On the other hand, you want a higher concentration of active ingredients. There is no right answer because what you need depends on your situation and habits, such as where you are, how often you re-apply, whether you’re sweating from physical activity, etc. Below are my personal recommendations for a typical daily routine that does not involve intense sun exposure (e.g. Here's what you need to know about titanium dioxide and zinc oxide. remains sinks in remarkably easily. Although zinc oxide occurs in nature, the mineral is quite rare. The mineral deflects rays to help protect and prevent accelerated deterioration of the … The percentage of zinc oxide used is a factor in determining SPF levels. Biodegradable sunscreens containing only zinc oxide as an active ingredient provide adequate protection at concentrations above 15%. Zinc oxide is a harmless mineral able to provide UV protection and not only. I might choose Brand B over Brand A if it contained good antioxidants and Brand A didn’t. In sunscreens, zinc oxide percentages are usually around 25 to 30 percent. Zinc oxide has a long history of safe use. 3 doctors agree ( source ) I don’t know that I’d avoid titanium dioxide with as much vehemence as I avoid oxybenzone, for example, but pure zinc oxide sunblocks are probably the best choice. Zinc oxide: is a very effective sunscreen regardless of your skin color. The cause of these debates is the lack of clear regulations and studies that show what amount of mineral to use to achieve the desired level of protection. When the FDA began to consider sunscreen safety, it grandfathered in active ingredients from the late 1970s without reviewing the evidence of their potential hazards. What percentages of zinc oxide/titanium dioxide need to be in a sunscreen for good protection? Zinc oxide is available in several grades — Blue Lizard Sunscreen uses the very high-grade zinc oxide, which is preferred for pharmaceutical dermatology products. The information provided by this website is for educational purposes and should not be construed as medical advice, diagnosis, or treatment. However, two -- zinc oxide and titanium dioxide -- are physical blockers that block UVA and UVB. We’ve learned that, given a choice between Zinc Oxide or Titanium Dioxide, you should choose Zinc Oxide. Here’s a breakdown of the amount of zinc oxide in the most common skincare products you’re using: Sunscreens – 25-30% Makeup Products – 10-19% There have been reported sporadic cases of allergies and respiratory toxicity related to aerosolized products. What percentage of zinc oxide should be in sunscreen? Quite often, a formula will combine both. Zinc is currently the only common sunscreen ingredient that blocks the entire UVA and UVB spectrum, fighting the sun’s aging affects on skin. Regular zinc oxide also blocks visible light up to wavelengths 700 nm, whereas zinc nanoparticles block only up to 380 - 400 nm, depending on the specific formulation. Most people don’t apply enough sunscreen, which is why undesirable sunburns and tanning can occur despite sunscreen application. zinc oxide and titanium dioxide Zinc oxide and titanium dioxides are safest for a baby's delicate skin. Safe, effective, and broad-spectrum, non-nano Zinc Oxide physically blocks harmful, damaging solar rays. Titanium dioxide and zinc oxide might have complex names, but the way they protect skin is simple. See below. Like anything new, biodegradable sunscreens are looked at with suspicion by most consumers. Surprisingly, not all sunscreens offer this level of protection. If sensitivity occurs in the form of rash or irritation, discontinue use. A lot of other sunscreens I find have 10% zinc oxide or above. For a low to moderate level of protection, you’ll want to add 5-15% of the lotions weight in zinc oxide. Babies shouldn’t wear sunblock of any kind until they are six months old. Like anything new, biodegradable sunscreens are looked at with suspicion by most consumers. Physical blockers made it a key ingredient in mineral – or biodegradable – sunscreens regular sunscreens, oxide... See why I confused you on this, given a choice, opt for zinc sunscreen it on. Irritating and compatible with sensitive skin manufacturers use both zinc oxide has long. 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