Sunscreen: What You Need to Know

Sunscreen: What You Need to Know

By Dr. Justin Marchegiani

Summer is upon us, which means vacations, BBQs, poolside lounging, and all-around more time outdoors! I have previously discussed the benefits of sunshine and spending time outside, however, for many of us, our sun exposure will be shooting up pretty quickly with the changing of the seasons. If you haven’t built your “sollar callus,” you may be more prone to burning in the sun. The most common way we are taught to prevent sunburn is by using sunscreen. Today I want to talk to you about the pros and cons of using sunscreen, and the safest ways to protect yourself against sunburn and skin cancer.

Dirty Sunscreen Secrets

This year the Environmental Working Group (EWG) published a report with shocking results: nearly two-thirds of sunscreens on the market don’t actually work, or contain worrisome ingredients that are absorbed into the body. The United States tends to have very lax safety standards regarding skin care ingredients. In fact, about half of the sunscreen sold in the US wouldn’t pass the European Union’s safety standards!

Sunscreen: What You Need to Know

Here are some common ingredients you can find in sunscreens sold in the United States:

  • Oxybenzone: Easily absorbed into the skin, and can be detected in urine, blood, and breast milk samples. Studies show that oxybenzone is a potential endocrine disruptor, affecting hormone levels. Due to their increased susceptibility and potential bioaccumulation, children are at an even higher risk. (*)
  • Octinoxate: Animal studies on octinoxate report lower sperm counts, sperm abnormalities, and delayed puberty. It can be detected in a mother’s milk. Octinoxate has hormone-like activity, and affects the reproductive system, thyroid, and alters behavior.
  • Homosalate: Another widespread sunscreen ingredient, homosalate disrupts estrogen, androgen, and progesterone.

A major problem with many ingredients in sunscreen (and other skin care products) is that there really just hasn’t been enough research done to prove their safety. And from the little we do know, all signs point to avoiding these ingredients.

How to Choose the Right Sunscreen

We know our skin is our largest organ and absorbs what you put on it. This is why the ingredients in all personal care products matter, especially for the products that we apply and leave on, like sunscreen and lotion.

Firstly, avoid spray sunscreens. Inhaling these ingredients pose a whole new set of health dangers, and it’s hard to apply them correctly. The FDA has even raised concerns regarding spray-on sunscreen. Plus, using spray-on sunscreens subjects anyone in the vicinity to breathing in these airborne toxins.

It’s important to note that SPF can be misleading. When you properly apply SPF 50 sunscreen, it blocks 98 percent of UVB rays; SPF 100 blocks 99 percent. The misinformation regarding SFP values leads consumers to believe they are more protected than they actually are. This false sense of protection causes sunbathers to spend more time outside, applying sunscreen less frequently, and ultimately, higher incidence of sunburn.

Sunscreen: What You Need to Know

In addition to the known toxic ingredients in sunscreen, about 40% of sunscreens contain the seemingly harmless vitamin A. While this sounds innocuous, studies show that vitamin A ingredients react poorly with UV rays, increasing the risk of skin developing tumors and lesions. It is recommended to avoid sunscreens, lip products, and skin lotions containing vitamin A, also listed as retinyl palmitate, retinyl acetate, retinyl linoleate, and retinol.

Badger is a widely available sunscreen that is EWG-approved. The sun protection comes from non-nano zinc oxide. Many mainstream sunscreens use “nanoparticles” which help the sunscreen absorb into your skin. While this helps the sunscreen rub all the way in so that it’s no longer visible, it also means you’re absorbing all of the ingredients into your skin and bloodstream.

The non-nano particles in a safe sunscreen such as the Badger brand mean that they are not readily absorbed. These are the sunscreens that will leave you with a little bit of a whitish-blue tint to your skin, but it’s much better than the alternative!

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Sunscreen: What You Need to Know

Safe Sun Habits

Food for thought: The EWG reports that melanoma doesn’t tend to appear on parts of the body that get daily sun exposure. Plus, people who work indoors are at a much higher risk for melanoma than those who work outside.

Sunscreen: What You Need to Know

It’s commonly accepted that increased sun exposure leads to increased risk of melanoma. However, studies show that:

  • Those who wear sunscreen are more likely to develop melanoma.
  • Melanoma patients who got higher amounts of sun exposure tended to have less aggressive tumor types,
  • Higher sun-exposure melanoma patients were less likely to die than other melanoma patients. (*)

Now, this may be due to the toxicity of mainstream sunscreen ingredients. However, there are many ways to minimize sunscreen usage.

  • Build your solar callus: Gradually work up a tan. Many of us emerge in the summer after many months indoors. You may only be able to start with 15 minutes outside if you are pale and prone to burning. However, over the course of days/weeks, you’ll build up your ‘solar callus’ and you will be able to spend more and more time outside.
  • Seek the shade: You can reap the benefits of sunlight without having to be under direct sun.
  • Cover up: Instead of always relying on sunscreen, you can simply layer up. Using clothes or sun cover ups are a great way to decrease the sun’s intensity on your skin.
  • Choose a healthy sunscreen: When you know you’re going to need sunscreen, choose a natural, non-nano sunscreen, such as Badger sunscreen.


UV from the sun actually provides our bodies with an essential “stress” which signals to molecules on our skin to convert to the active form of vitamin D. Vitamin D is considered perhaps the most common medical condition in the world. Vitamin D deficiency has been linked to virtually all forms of cancer (prostate cancer, breast cancer, leukemia, gastrointestinal cancer, bladder cancer…), cardiovascular disease, and autoimmune disease.

The sun is perhaps our greatest healer, but we must respect its intensity. By practicing safe sunning practices, you can get vitamin D without burning or ingesting the toxic side effects of mainstream sunscreen ingredients!

Have more questions about sunscreen? Click here to talk to a professional!


The entire contents of this website are based upon the opinions of Dr. Justin Marchegiani unless otherwise noted. Individual articles are based upon the opinions of the respective author, who retains copyright as marked. The information on this website is not intended to replace a one-on-one relationship with a qualified health care professional and is not intended as medical advice. It is intended as a sharing of knowledge and information from the research and experience of Dr. Justin and his community. Dr. Justin encourages you to make your own health care decisions based upon your research and in partnership with a qualified healthcare professional. These statements have not been evaluated by the Food and Drug Administration. Dr. Marchegiani’s products are not intended to diagnose, treat, cure or prevent any disease. If you are pregnant, nursing, taking medication, or have a medical condition, consult your physician before using any products.