Denver Sun: Dark Skin Still Needs Summer D?

Photograph of Franklin Everett ShawBy Franklin Everett Shaw
December 24, 2025

Imagine stepping out into the bright Denver sunshine, ready to soak up some Vitamin D. But for those of us with darker skin tones, it’s not quite that simple. The Mile High City’s unique altitude and intense sun, combined with the melanin in our skin, create a unique challenge in getting enough of this essential nutrient. We need a tailored approach.

This isn’t about generic advice; it’s about understanding how Denver’s specific environment impacts Vitamin D absorption for people of color. It’s about actionable steps you can take, right here in Denver, to optimize your health.

Vitamin D deficiency is a widespread issue, but it disproportionately affects individuals with darker skin. Melanin, the pigment that gives our skin its color, acts as a natural sunscreen, reducing the skin’s ability to produce Vitamin D from sunlight. This means we need more sun exposure than our lighter-skinned counterparts to achieve the same levels.

Denver’s altitude adds another layer of complexity. While the thinner atmosphere means more UVB rays (the kind that stimulate Vitamin D production) reach the surface, it also means a higher risk of sunburn. Finding the right balance is crucial.

So, how do we navigate this? Let’s break it down into practical steps.

First, let’s talk about sun exposure. Forget the blanket recommendations you see online. In Denver, during the peak summer months (June-August), aim for 15-20 minutes of sun exposure on your arms and legs, ideally between 10 am and 2 pm. This is when UVB rays are strongest.

But here’s the catch: pay attention to your skin. If you start to feel any burning sensation, get out of the sun immediately. Sunscreen is essential for preventing skin cancer, but it also blocks Vitamin D production. Consider skipping sunscreen for those 15-20 minutes, then applying it liberally afterward.

A common mistake is thinking you can get enough Vitamin D through a window. Glass blocks UVB rays, rendering it useless for Vitamin D synthesis. You need direct sunlight on your skin.

Now, let’s move on to food. While sunlight is the primary source of Vitamin D, certain foods can help boost your levels. Unfortunately, many commonly fortified foods, like milk, aren’t staples in everyone’s diet, especially those with lactose intolerance.

Here’s where Denver’s local resources come in. Look for Vitamin D-rich foods at local farmers’ markets and grocery stores. Fatty fish like salmon, trout, and mackerel are excellent sources. Check out seafood counters at stores like Pacific Ocean Marketplace on Federal Boulevard for affordable options.

Eggs are another good source, particularly the yolks. Opt for eggs from pasture-raised chickens, as they tend to have higher Vitamin D levels. You can find these at farmers’ markets like the South Pearl Street Farmers Market.

Mushrooms are unique in that they can produce Vitamin D when exposed to UV light. Look for UV-treated mushrooms at stores like Whole Foods Market.

However, relying solely on food is often not enough, especially for those with darker skin in a sunny but high-altitude environment like Denver. This is where supplementation comes in.

Before starting any supplement regimen, it’s crucial to get your Vitamin D levels checked by a doctor. Ask your primary care physician for a 25-hydroxyvitamin D blood test. This will give you a baseline and help determine the appropriate dosage.

The recommended daily intake of Vitamin D is 600 IU (International Units) for adults, but many people with darker skin may need significantly more. Your doctor can advise you on the right dosage based on your individual needs.

When choosing a Vitamin D supplement, opt for Vitamin D3 (cholecalciferol), which is more effective at raising blood levels than Vitamin D2 (ergocalciferol). You can find Vitamin D3 supplements at most pharmacies and health food stores in Denver, such as Natural Grocers.

Be wary of extremely high doses of Vitamin D, as they can be toxic. Always follow your doctor’s recommendations.

One challenge many Denver residents face is access to healthcare and affordable testing. If you’re uninsured or underinsured, consider exploring resources like Denver Health, which offers a sliding scale fee program for medical services.

Another potential pitfall is assuming that summer sun exposure will last you through the winter. Denver’s winters are long and sunny, but the angle of the sun is lower, and we tend to spend more time indoors. Continue taking Vitamin D supplements throughout the winter months to maintain optimal levels.

It’s also important to be aware of potential health disparities. Studies have shown that African Americans, for example, are more likely to be Vitamin D deficient than Caucasians. This can contribute to a higher risk of various health problems, including bone diseases, cardiovascular disease, and certain cancers.

Addressing these disparities requires a multi-pronged approach, including increased awareness, improved access to healthcare, and culturally sensitive health education. Organizations like the Colorado Black Health Collaborative are working to address these issues in the Denver community.

Finally, remember that Vitamin D is just one piece of the puzzle. A healthy diet, regular exercise, and adequate sleep are also essential for overall health and well-being.

Don’t fall for the myth that simply living in a sunny place like Denver guarantees adequate Vitamin D levels. For those with darker skin, a proactive and informed approach is necessary. By understanding the unique challenges posed by Denver’s environment and taking targeted steps to optimize sun exposure, diet, and supplementation, you can ensure you’re getting enough of this vital nutrient and protecting your health.

Take control of your health, Denver. It’s time to shine, inside and out.

The information provided on Core Wellness Guide is intended for general informational purposes only. The content on this site should not be construed as medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare professional before making any changes to your diet, exercise routine, or health regimen. I am not a licensed fitness or health professional. Any exercise or wellness programs or advice you choose to follow are done at your own risk. Core Wellness Guide is not liable for any injuries or damages resulting from the use or misuse of the information on this website. Some of the links on this website are affiliate links, meaning I may earn a small commission if you purchase products through these links. However, I only recommend products that I trust and believe will add value to my readers. Results from fitness and health programs may vary depending on individual factors such as age, gender, and fitness level. Testimonials or success stories on this blog are based on individual experiences and do not guarantee the same results for everyone. This blog may contain links to third-party websites, and I am not responsible for their content, privacy policies, or practices.