The Truth about SPF — Why We Use Zinc in Our Safe, Natural Sun Protection

Sunscreens. Used to be you could just slap one on and go out feeling protected and at ease.

Not so much anymore. Studies have shown that a number of chemicals in sunscreens, such as PABA, cinnamates, oxybenzone, and more can react with the sun’s rays to create damaging free radicals, which may actually increase the risk of skin cancer.

Chemical sunscreens have also been linked with hormone disruption. Research has found that they can act like estrogen in the body, throwing natural hormones off balance. In a study of six common sunscreen chemicals, five acted like estrogen, causing an increase in human breast cancer cells.

Another concern with these sunscreens is that they have the potential to penetrate deeply into skin, getting inside the body. A 1999 study, for instance, found that all sunscreen agents tested penetrated into the skin, with benzophenone-3 (oxybenzone) passing through in significant amounts. In 2008, the Centers for Disease Control and Prevention (CDC) reported that nearly all Americans were contaminated with oxybenzone, which has been linked with hormone disruption and allergies.

To get away from these risks, most dermatologists and other skin care experts recommend using so-called “physical” sunscreens like titanium dioxide and zinc oxide.

Here’s more on the subject, and why we chose zinc oxide for our formula to protect skin from cancer and premature aging.

Chemical Sunscreens vs. Physical Sunscreens

For many years now, people have been categorizing sunscreens into two groups—physical and chemical. Chemical sunscreens are made in the laboratory and are like those listed above—cinnamates, oxybenzone, etc. They are said to reduce sun damage by absorbing UV rays and robbing them of their harmful power.

Physical sunscreens, on the other hand—like zinc oxide and titanium dioxide—are made of natural elements found on the earth, and are said to “block” or “scatter” UV rays so they never penetrate the skin in the first place. Later research showed this wasn't entirely true—physical sunscreens absorb UV rays as well—but they do retain some scattering ability, depending on the size of the UV wavelength. It all gets very scientific, but you can still think of these two groups when thinking about the different types of sunscreens available.

In general, physical sunscreens are considered to be the safer options because they offer a more broad-spectrum protection and lack the hormone-disrupting effects.

What is SPF?

Most sunscreens list an SPF number on the label. SPF stands for “sun protection factor,” and is a measurement of protection from only UVB rays, which are the ones that cause redness and sunburn.

UVA rays are considered even more dangerous, as they penetrate skin more deeply and are linked to skin cancer. But SPF does not measure a sunscreen’s protection against UVA rays—only UVB rays.

To further explain—the SPF is a measurement of the difference between the amount of sunlight that causes redness in sunscreen-protected skin and the amount that causes redness in unprotected skin. A sunscreen with an SPF of 15 theoretically gives you 15 times the minutes to stay out before you burn.

Example: if you usually burn in 10 minutes, and you apply an SPF 15 product, you can stay out for 150 minutes.

There are some problems with this equation, though. It makes people believe that an SPF of 30 would allow them to remain twice as long in the sun as an SPF 15. In truth, an SPF 15 blocks about 93 percent of UVB rays, while an SPF 30 blocks about 97 percent, and an SPF 50 about 98 percent. So going higher and higher doesn't necessarily create more protection after a certain point.

In addition, these numbers have nothing to do with UVA rays, so people who slather on an SPF of 50 and stay in the sun for hours are likely to suffer even more severe skin damage if they don’t have a “broad spectrum” sunscreen that protects from both UVA and UVB rays.

In addition, high SPF products are often made with greater percentages of chemical ingredients, which may be linked to hormone disruption, trigger allergic reactions, and potentially expose you to more free-radical damage.

The Benefits of Zinc Oxide

When formulating our natural sun protection, our highest priorities were broad-spectrum protection and safety. We wanted to offer our customers protection from both UVA and UVB rays, which cause premature aging.

Zinc oxide has had a long history of use as a sun protection. It offers broad-spectrum protection, shielding you from both UVB rays, which cause sunburn, and UVA rays, which penetrate more deeply and may be more dangerous.

Zinc is an essential mineral that we actually need in our bodies for optimal function, and is the only active sunscreen ingredient approved by the FDA for infants under six months.

Bottom Line

There’s no doubt that UV exposure increases the risk for skin cancer and accelerates the effects of aging. A healthy skin-care regimen must include protection. We've combined the best of all worlds by including the following in our formula:

  • Zinc oxide, which is still considered the safest option in sunscreens. It’s the only sunscreen recommended by the FDA for babies. It offers superior broad-spectrum protection against both UVA and UVB rays.
  • Antioxidants, which help the skin with environmental stressors. That’s why we pack our products full of them! If you’re regularly using our skin care products, or apply other forms of antioxidants to your skin, you’re getting an added boost of protection. We added antioxidant-rich buriti fruit and sunflower seed oil to the new formula.
  • Naturally soothing ingredients help reduce skin’s reaction to the sun, allowing it to glow with radiance. We've included ingredients like lavender and hemp seed oil that can naturally make your skin feel calm and cool.
  • Natural moisturizers which keep skin soft and healthy. The stronger your skin is, the better it is able to resist harmful stressors. Moisture is a key part of this process, as dry skin is likely to crack and flake, making skin more vulnerable to premature aging. Our Sun Love formula is an oil-based product that both protects from the sun’s rays and deeply moisturizes.

We’re excited about our new Sun Love – Natural Sun Protection. Have you tried it? What do you think?


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  1. Lynne says

    There’s some serious research and thinking you’ve done to produce this product. I appreciate that you’re using zinc oxide, though you haven’t stated the percentage of it in relationship to the whole product amount, nor the percentage needed for effectiveness over a given time period.
    AND, your info about titanium dioxide means I’ll be returning my brand new children’s SPF 50 sunscreen for babes . . . I’m the ‘baby’ here and likely purchasing yours! For the lady above mentioning not using the sunscreen on overcast days I just want to say: “Beware!” Sunburns can easily occur on overcast days, so once you start a sunscreen regimen you will want to do it all the time!

    • admin says

      Hi Lynne-
      The Zinc Oxide makes up 18% of the entire formula. We recommend reapplying the Sun Love every hour (if actively in the sun) or every couple of hours throughout the day if you are moderately in the sun.
      Hope this info helps!

  2. J says

    What about applying Sun Love to the lips as well for sun protection? Also, it would be so very nice if you could/would formulate a chemical-free lipstick to add to your line of products!! Thanks!

    • admin says

      Hi J! You can try applying Sun Love to your lips, but since it’s tinted, it might not give you the lip color you want. Hopefully you’ll a lip product from us soon. 🙂

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