St. Louis Sun: Are Sidewalks Causing Vitamin D Deficiency?
By Franklin Everett ShawAre you feeling sluggish, even when the sun is shining? You might be suffering from Vitamin D deficiency, and your city’s design could be partly to blame. Let’s talk about St. Louis, Missouri.
St. Louis, with its rich history and unique urban landscape, presents a particular challenge when it comes to getting enough Vitamin D. The city’s layout, characterized by extensive sidewalks and a relative scarcity of large, open green spaces compared to some other cities, can inadvertently limit residents’ opportunities for optimal sun exposure. This is a problem we can solve.
Vitamin D, often called the “sunshine vitamin,” is crucial for bone health, immune function, and overall well-being. Our bodies produce it when our skin is exposed to ultraviolet B (UVB) rays from the sun. But in a city like St. Louis, maximizing that exposure requires a conscious effort.
The urban design of St. Louis, while offering walkability, often prioritizes concrete over green. Think about it: long stretches of sidewalk lined with buildings, limiting the amount of direct sunlight reaching pedestrians. This is especially true in densely populated areas like Downtown or the Central West End.
Consider the impact of building height. Tall buildings cast long shadows, particularly during the winter months when the sun is lower in the sky. This reduces the amount of UVB radiation reaching street level, making it harder for residents to synthesize Vitamin D naturally.
Furthermore, the limited availability of large, open green spaces in some neighborhoods means fewer opportunities for residents to spend time outdoors in direct sunlight. While Forest Park is a fantastic resource, it’s not easily accessible to everyone in the city.
So, what can St. Louisans do to combat this urban Vitamin D deficit? It starts with understanding optimal sun exposure.
The amount of sun exposure needed to produce sufficient Vitamin D varies depending on several factors, including skin pigmentation, time of day, and season. People with darker skin pigmentation require more sun exposure than those with lighter skin.
In St. Louis, located at approximately 38.6 degrees north latitude, the angle of the sun changes dramatically throughout the year. During the winter months (roughly November to February), the sun’s angle is too low to allow for significant Vitamin D synthesis. UVB rays are largely filtered out by the atmosphere.
Therefore, focusing on sun exposure during the spring, summer, and fall is crucial. Aim for 10-30 minutes of midday sun exposure (between 10 am and 3 pm) several times a week. Expose as much skin as possible without sunscreen during these brief periods.
Don’t be afraid to strategically choose your location. Seek out areas with minimal shade, such as the open fields in Tower Grove Park or the riverfront area along the Mississippi. Even a short walk during your lunch break can make a difference.
But what about those winter months when sun exposure is less effective? Dietary sources of Vitamin D become even more important.
Fortunately, there are several foods rich in Vitamin D. Fatty fish like salmon, tuna, and mackerel are excellent sources. Egg yolks, cheese, and fortified foods like milk, yogurt, and orange juice can also contribute to your daily intake.
Consider incorporating these foods into your diet regularly, especially during the winter. A simple salmon dinner a couple of times a week can significantly boost your Vitamin D levels.
However, relying solely on dietary sources can be challenging. Many people find it difficult to consume enough Vitamin D through food alone. This is where supplementation comes in.
Vitamin D supplements are readily available and relatively inexpensive. The recommended daily intake for adults is typically 600-800 IU (International Units), but some individuals may require higher doses, especially if they are deficient.
It’s always a good idea to consult with your doctor or a registered dietitian to determine the appropriate dosage for your individual needs. They can also test your Vitamin D levels to assess your current status.
Now, let’s talk about some specific challenges St. Louisans might face. One common pitfall is relying on sunscreen year-round. While sunscreen is essential for protecting against skin cancer, it also blocks UVB rays, hindering Vitamin D synthesis.
During those brief periods of sun exposure aimed at boosting Vitamin D, consider going without sunscreen for a short time. Just be sure to limit your exposure to avoid sunburn.
Another challenge is the perception that you need to be actively sunbathing to get enough Vitamin D. This is not the case. Even incidental sun exposure, such as walking to work or running errands, can contribute to your daily intake.
Make a conscious effort to incorporate outdoor activities into your routine. Take a walk in Forest Park, bike along the Katy Trail, or simply sit outside and read a book. Every little bit helps.
Furthermore, be mindful of the time of day. The sun’s UVB rays are strongest during midday, so that’s the optimal time for sun exposure. Avoid prolonged sun exposure during the hottest part of the day to minimize the risk of sunburn.
Let’s consider a real-world scenario. Imagine a St. Louis resident who works in a downtown office building. They spend most of their day indoors, with limited access to sunlight.
To combat this, they could take a 15-minute walk during their lunch break, choosing a route that maximizes sun exposure. They could also incorporate Vitamin D-rich foods into their diet, such as salmon or fortified milk. And they could consider taking a Vitamin D supplement, especially during the winter months.
Another example: a parent in the Shaw neighborhood. They could take their children to the Missouri Botanical Garden, ensuring they spend some time in the open areas where they can get some sun. They could also pack a lunch that includes Vitamin D-rich foods.
Remember, optimizing your Vitamin D levels in St. Louis requires a proactive approach. By understanding the city’s unique urban environment, maximizing sun exposure during the appropriate times of year, incorporating dietary sources of Vitamin D, and considering supplementation, you can ensure you’re getting enough of this essential nutrient. Don’t let the concrete jungle keep you from the sunshine vitamin.