Eat Your SPF? The Science Behind Food and Natural Skin Protection

Jun 14

Estimated Read Time: 7 minutes

Sunlight has been part of human health for as long as we’ve existed, even if its full impact wasn’t always understood.

For almost all of history, people lived in close connection with the sun. They worked outdoors, exposed their skin to the elements regularly, and relied on natural light to regulate everything from their sleep and energy levels to hormone production and immunity.

Today, that relationship has changed. Sunlight is often treated as something to avoid, yet the right amount, at the right time, is not only safe but essential for long-term health. For example, sunlight not only produces vitamin D but is also involved in mitochondrial function and more.

At the same time, too much sun, especially without preparation or awareness, can lead to burns and long-term skin damage. That’s where a more balanced approach comes in.

Protection doesn’t just come from what you put on your skin. It also comes from how you nourish your body. Certain foods contain compounds that help support the skin’s response to sunlight, while others can aid in repair and recovery after exposure. Even traditional fats and plant-based ingredients applied topically can help strengthen the skin barrier and promote healing.

In this article, we’ll take a closer look at how to approach sun exposure wisely, what to know about sunscreen, and how nutrition and natural compounds can support healthier, more resilient skin from the inside out.

Why Sunlight Matters for Wellbeing

Before getting into sunscreen, it’s worth taking a step back and addressing that your body was designed to be in the sun.

Most people focus on how to block the sun, but far fewer think about why their body actually needs it. Avoiding the sun entirely can do more harm than good, which is why I don't recommend it.

Sunlight is your body’s most natural source of vitamin D. And vitamin D isn’t just about bones.

You also need it for healthy immune function, hormone balance, mood, and metabolic health. Vitamin D deficiency is extremely common—roughly 4 in 10 adults in the U.S. don't get enough—largely due to limited sun exposure.

Beyond vitamin D, sunlight exposure has been shown to:

Help regulate your circadian rhythm (your "internal clock") and improve sleep quality
Support mitochondrial function, which helps your body produce energy
Increase nitric oxide, which supports circulation and cardiovascular health
Influence hormones like testosterone

Some studies suggest people with higher sun exposure may have lower all-cause mortality rates, even when controlling for other factors.

In my own routine, living in Tennessee, I aim to get about 30 minutes of direct sun exposure around midday, typically between 10 a.m. and 3 p.m. I do this a few times per week, year-round, when possible.

Why do I head outdoors midday? Because that window provides the most effective UVB exposure for vitamin D production. I find that getting this amount of sunlight keeps my immune defenses up, especially in the winter when sicknesses seem to be everywhere, plus it helps me sleep better and generally feel more upbeat.

What About When Sunlight Isn’t Available?

Sunlight isn’t always consistent, especially during the winter months, and that’s where tools like UVB light can help.

I often supplement natural sunlight with a UVB lamp (not UVA) for about 10 minutes most days, especially when I’m not getting enough sun. UVB light is the specific wavelength responsible for vitamin D production in the skin.

Research shows that UVB exposure can help support:

Healthy vitamin D levels
Hormone production, including testosterone
Immune function
Bone health
Gut health

A UVB lamp can be helpful during colder months or flu season, when natural sun exposure is limited and immune resilience becomes even more important.

Sunscreen: Facts and Misconceptions

Now, as promised, let's talk about sunscreen. My overall view is that sunscreen has its place, but it’s often misunderstood.

Sunscreen can certainly help you avoid excessive exposure that leads to burning and long-term damage, and for that reason, it's useful in some situations.

That said, here are a few important things to keep in mind regarding the use of sunblock:

Short, controlled sun exposure can be beneficial before applying sunscreen
Overuse of sunscreen can significantly limit vitamin D production (by up to about 90%), especially when applied immediately before any sun exposure
There are several different types of sunscreens, and they each work somewhat differently

From my perspective, if you’re going to use sunscreen, mineral-based options tend to be a better choice. Here's what to look for when buying sunblock:

Zinc oxide (non-nano): Sits on the skin and reflects UV rays rather than absorbing them
Avoid nano-particle formulations that may be absorbed into the body
Avoid chemical sunscreens that rely on compounds that can potentially be absorbed and cause issues like disrupted hormones

What to Do If You Get Too Much Sun

Even with the best approach, sunburns can still happen. When it does, your goal is to calm inflammation and support repair.

One of the most effective remedies is fresh aloe vera gel. Fresh, high-quality aloe contains compounds that naturally:

Soothe irritated skin
Reduce inflammation
Support skin healing, including even serious burns

The closer that aloe is to its natural form, the better. Processed aloe products often lack the same potency, so make an effort to find 100% pure aloe (or consider growing it yourself, including indoors).

Can You “Eat Your SPF”?

You may have heard the idea that certain foods act like “internal sunscreen.” That’s not exactly accurate, since no food replaces the need for mindful sun exposure.

But certain nutrients can help your skin respond better to sunlight, reduce oxidative stress, and support recovery from sun exposure.

Foods That Support Skin Resilience:

Polyphenol-Rich Foods:

Polyphenols are plant compounds that help protect against oxidative stress, including the kind caused by UV exposure. Research shows that diets high in polyphenols can help reduce skin damage from UV radiation over time.

Good sources include:

High-polyphenol olive oil
Green and black tea
Berries (blueberries, strawberries, raspberries)
Pomegranates
Red and purple grapes
Cherries
Red onions
Artichokes
Spinach and kale
Dark chocolate (70%+ cacao)
Herbs and spices (oregano, cloves, turmeric)
Flaxseeds
Nuts (especially walnuts and almonds)
Sea buckthorn

Herbal blends like Healing Leaves:

These compounds help neutralize free radicals and support skin repair. Many herbs also contain natural anti-inflammatory compounds that can calm the skin and support recovery after sun exposure, especially when consumed consistently over time.

Leaves that are rich in polyphenols and supportive for skin include:

Olive leaf: High in oleuropein, supports antioxidant activity and skin protection
Green tea leaf: Rich in catechins like EGCG, helps reduce UV-related oxidative stress
Black tea leaf: Contains theaflavins that support skin repair and circulation
Mint leaf (peppermint/spearmint): Calming, supports digestion, and has mild antioxidant effects
Chamomile: Contains flavonoids that help calm inflammation and support skin healing
Rooibos (red bush): High in antioxidants that support skin health

Healthy Fats for Skin Protection:

Your skin is made up of lipids, so the types of fats you consume matter.

Omega-3 fats: Found in fish, they help reduce inflammation associated with damage or burns, and support skin structure
Omega-7 fats: Found in sea buckthorn, help support skin hydration and repair

Sea buckthorn is especially unique because it contains both omega-3 and omega-7 fatty acids, along with antioxidants that support skin health from within.

Key Supplements for Skin Support

Astaxanthin:

Astaxanthin is a powerful antioxidant found in algae and seafood like salmon. It’s known for its ability to:

Reduce oxidative stress
Support skin elasticity
Help protect against UV-related damage

Some studies suggest that astaxanthin supplementation can improve skin moisture, reduce wrinkles, and increase resistance to UV stress. Certain people even find that supplementing with it helps their skin have a natural "glow" from within.

According to one review, supplementation with astaxanthin was especially beneficial for photoaged skin, such as by enhancing skin elasticity and reducing wrinkle depth in as little as 6–8 weeks.

Polypodium Leucotomos:

Also known as tropical fern extract or calaguala, this lesser-known plant has been shown in studies to help:

Reduce UV-induced skin damage (one study found it improved protection against sun damage in 80% of participants)
Support the skin’s response to sun exposure
Decrease inflammation following UV exposure

Polypodium Leucotomos is sometimes even referred to as an “internal sunscreen,” but a better way to think about it is internal skin support.

Topical Products that Support Healthy Skin

Some people also use traditional fats and plant oils to support the skin. These aren’t replacements for sunscreen in extreme conditions, but they can support the skin’s natural resilience.

Tallow: Rich in fat-soluble nutrients that support skin health
Coconut oil: Provides light protection and supports the skin barrier
Lavender oil: Known for its soothing and antioxidant properties
And others like olive, jojoba, argan, and almond oil

The Takeaway on Protecting Your Skin & Balancing Sunlight Exposure

Sunlight isn’t the enemy, but overexposure is.

You can benefit from an appropriate amount of sunlight, such as to support vitamin D production, as long as you do it mindfully. And certain plants, oils, and supplements can also help your skin stay strong, better protected, and able to handle sun exposure more easily.

Action Steps for Smarter Sun Exposure:

Get regular sun exposure: Aim for short periods of direct sunlight, ideally around midday.
Avoid burning: Aim for about 20 to 30 minutes in the sun without sunscreen, but not hours. Build tolerance gradually instead of overexposing your skin.
Use better sunscreen when needed: Choose non-nano zinc oxide if protection is necessary.
Support your skin with nutrition: Focus on polyphenols and healthy fats.
Consider targeted supplements: Astaxanthin and Polypodium leucotomos can support skin health.
Treat sunburns with supportive topicals: Use fresh aloe vera and support recovery.