A new study conducted by researchers at the University of California, San Francisco has linked excess sodium intake with the development, activation, and intensifying of atopic dermatitis, or eczema. Atopic dermatitis is a collection of inflammatory skin conditions that affects nearly 32 million people in the U.S., most of whom are children. Symptoms of atopic dermatitis can include rashes, dry and scaly skin, itching, and more. The study found that individuals with higher levels of dietary sodium intake had an increased risk of developing atopic dermatitis and experiencing more severe symptoms.
The study included data from 215,832 participants aged 37 to 73, with a mean age of 56.52 years. Urinalysis revealed that for every 1 gram of sodium above the mean, the risk of atopic dermatitis increased. It is believed that sodium stored in the skin can trigger inflammatory pathways leading to the development of atopic dermatitis. However, environmental factors and other causes also play a role in the development of the condition. The study’s findings suggest that reducing salt intake could be a simple way to prevent or alleviate atopic dermatitis.
Atopic dermatitis is most common in children, affecting around 1 in 5. Approximately 9.6 million children in the U.S. have AD, with a third of them experiencing moderate to severe symptoms. Additionally, roughly 7.5% of American adults, or 16.5 million people, have AD, with about 40% having a moderate to severe form of the condition. Because the causes of AD are multifactorial and vary from person to person, it is unlikely that sodium is the only factor contributing to the development of the condition. Other foods have also been associated with triggering AD, and a food elimination trial can help determine potential triggers.
It is important to note that eliminating dietary sodium altogether is not feasible, as sodium naturally occurs in many foods and is added to processed foods for preservation and flavor. Not getting enough sodium can lead to health issues, such as fatigue, muscle weakness, and nutrient deficiencies. RDN Michelle Routhenstein recommended adjusting to consuming less sodium by replacing it with other flavorful options like herbs, spices, citrus juices, vinegar, and garlic. It is also crucial for individuals attempting a food elimination trial to seek guidance from a registered dietitian to prevent nutrient deficiencies.
In conclusion, the study’s findings suggest that high levels of dietary sodium intake may increase the risk of developing atopic dermatitis. However, more research is needed to understand the full extent of how dietary factors impact the development and severity of the condition. Overall, reducing salt intake and exploring potential trigger foods through a food elimination trial may offer relief for individuals living with atopic dermatitis.
