Link, Effectiveness, and Research on Vitamin D for Eczema Treatment
In recent research, scientists have been exploring the connection between vitamin D deficiency and the development of eczema, as well as the potential benefits of supplementation in managing symptoms.
The "vitamin D hypothesis" proposes that lower levels of the vitamin may have links to eczema. This hypothesis is supported by a study that found lower vitamin D levels were associated with eczema severity, and supplementation improved symptoms in 67% of participants.
Vitamin D plays a crucial role in regulating the immune system, protecting the skin barrier, and influencing gene expression, which may predispose children to eczema. It also protects the skin's barrier function, which helps to prevent infections.
Atopic dermatitis, the most common type of eczema, primarily affects children and adolescents in the United States. Current research suggests that vitamin D supplementation may improve eczema symptoms by enhancing skin barrier function and regulating the immune system, though evidence is still evolving and not yet conclusive as a standalone treatment.
Regarding dosage, the recommended daily intake (RDA) of vitamin D is generally 15 micrograms (mcg) or 600 IU per day for most adults, and 20 mcg (800 IU) per day for elderly adults. The upper intake limit (UL) to avoid toxicity is typically considered to be 100 mcg (4000 IU) per day for adults, though specific limits can vary by health authority.
Vitamin D is obtained from various sources, including the sun, food, and supplements. Two forms of vitamin D supplements are available: D2 (ergocalciferol) and D3 (cholecalciferol). D3 potentially raises vitamin D levels higher and for longer than D2.
People who suspect they may be deficient in vitamin D should consult a doctor to test their levels. It's important to note that some groups of people may have a higher risk of vitamin D deficiency, including infants who solely consume breastmilk, older adults, people who seldom expose their skin to sunlight, people with darker skin, those with health conditions that limit fat absorption, people who are obese or have had gastric bypass surgery.
While the American Academy of Dermatology Association advises that there is not enough scientific evidence to recommend using vitamin D to treat eczema, the American Academy of Allergy, Asthma & Immunology highlights that there has been a recent increase in studies associating vitamin D deficiency with eczema.
Vegans can opt for D3 made from lichen or D2 due to some D3 being derived from sheep's wool. It's also worth noting that vitamin D is fat-soluble and is absorbed best with a meal or snack that includes some fat.
In summary, while more research is needed to establish definitive treatment guidelines focused on eczema, vitamin D supplementation shows promise as part of eczema management due to its skin and immune benefits. Daily intake should follow established RDA guidelines and avoid exceeding upper safety limits to prevent adverse effects.
- The "vitamin D hypothesis" suggests that lower levels of vitamin D may be associated with the development and severity of eczema.
- A study supported the "vitamin D hypothesis", as it found that supplementation improved symptoms in 67% of participants with eczema.
- Vitamin D plays a significant role in regulating the immune system, protecting the skin barrier, and influencing gene expression, which might predispose children to eczema.
- Current research suggests that vitamin D supplementation may help manage eczema symptoms by enhancing skin barrier function and regulating the immune system, though evidence is still evolving.
- To prevent vitamin D deficiency, people should consider obtaining it from various sources, such as the sun, food, supplements, or vegan alternatives like D3 made from lichen.
