Editing Dermatitis (section)

==Prevention==
There have been various studies on the prevention of dermatitis through diet, none of which have proven any positive effect.

Exclusive [[breastfeeding]] of infants during at least the first few months may decrease the risk.<ref name=Gre2019>{{cite journal | vauthors = Greer FR, Sicherer SH, Burks AW | title = The Effects of Early Nutritional Interventions on the Development of Atopic Disease in Infants and Children: The Role of Maternal Dietary Restriction, Breastfeeding, Hydrolyzed Formulas, and Timing of Introduction of Allergenic Complementary Foods | journal = Pediatrics | volume = 143 | issue = 4 | pages = e20190281 | date = April 2019 | pmid = 30886111 | doi = 10.1542/peds.2019-0281 | doi-access = free }}</ref> There is no good evidence that a mother's diet during [[pregnancy]] or breastfeeding affects the risk,<ref name=Gre2019/> nor is there evidence that delayed introduction of certain foods is useful.<ref name=Gre2019/> There is tentative evidence that probiotics in infancy may reduce rates but it is insufficient to recommend its use.<ref name=Kall2010>{{cite journal | vauthors = Kalliomäki M, Antoine JM, Herz U, Rijkers GT, Wells JM, Mercenier A | title = Guidance for substantiating the evidence for beneficial effects of probiotics: prevention and management of allergic diseases by probiotics | journal = The Journal of Nutrition | volume = 140 | issue = 3 | pages = 713S–721S | date = March 2010 | pmid = 20130079 | doi = 10.3945/jn.109.113761 | doi-access = free }}</ref> There is moderate certainty evidence that the use of skin care interventions such as emollients within the first year of life of an infant's life is not effective in preventing eczema.<ref name=":0">{{Cite journal |last1=Kelleher |first1=Maeve M. |last2=Phillips |first2=Rachel |last3=Brown |first3=Sara J. |last4=Cro |first4=Suzie |last5=Cornelius |first5=Victoria |last6=Carlsen |first6=Karin C. Lødrup |last7=Skjerven |first7=Håvard O. |last8=Rehbinder |first8=Eva M. |last9=Lowe |first9=Adrian J. |last10=Dissanayake |first10=Eishika |last11=Shimojo |first11=Naoki |last12=Yonezawa |first12=Kaori |last13=Ohya |first13=Yukihiro |last14=Yamamoto-Hanada |first14=Kiwako |last15=Morita |first15=Kumiko |date=14 November 2022 |title=Skin care interventions in infants for preventing eczema and food allergy |journal=The Cochrane Database of Systematic Reviews |volume=2022 |issue=11 |pages=CD013534 |doi=10.1002/14651858.CD013534.pub3 |issn=1469-493X |pmc=9661877 |pmid=36373988}}</ref> In fact, it may increase the risk of skin infection and of unwanted effects such as allergic reaction to certain moisturizers and a stinging sensation.<ref name=":0" />

===Healthy diet===
{{see also|Healthy diet}}

There has not been adequate evaluation of changing the diet to reduce eczema.<ref name="CC-Bath-Hextall">{{cite journal | vauthors = Bath-Hextall F, Delamere FM, Williams HC | title = Dietary exclusions for established atopic eczema | journal = The Cochrane Database of Systematic Reviews | issue = 1 | pages = CD005203 | date = January 2008 | volume = 2008 | pmid = 18254073 | pmc = 6885041 | doi = 10.1002/14651858.CD005203.pub2 | url = https://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0013319/ | url-status = live | veditors = Bath-Hextall FJ | archive-url = https://web.archive.org/web/20131021223144/http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0013319/ | df = dmy-all  | archive-date = 21 October 2013 }}</ref><ref name="IQWiG-eliminate">{{cite web|last=Institute for Quality and Efficiency in Health Care|title=Eczema: Can eliminating particular foods help?|url=https://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0005096/|work=Informed Health Online|publisher=Institute for Quality and Efficiency in Health Care|access-date=24 June 2013|url-status=live|archive-url=https://web.archive.org/web/20131021223600/http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0005096/|archive-date=21 October 2013}}</ref> There is some evidence that infants with an established [[egg allergy]] may have a reduction in symptoms if eggs are eliminated from their diets.<ref name="CC-Bath-Hextall" /> Benefits have not been shown for other elimination diets, though the studies are small and poorly executed.<ref name="CC-Bath-Hextall" /><ref name="IQWiG-eliminate" /> Establishing that there is a [[food allergy]] before dietary change could avoid unnecessary lifestyle changes.<ref name="CC-Bath-Hextall" />

====Fatty acids====
Oils with fatty acids that have been studied to prevent dermatitis include:<ref>{{cite journal |last1=Søyland |first1=E |last2=Funk |first2=J |last3=Rajka |first3=G |last4=Sandberg |first4=M |last5=Thune |first5=P |last6=Rustad |first6=L |last7=Helland |first7=S |last8=Middelfart |first8=K |last9=Odu |first9=S |last10=Falk |first10=ES |title=Dietary supplementation with very long-chain n-3 fatty acids in patients with atopic dermatitis. A double-blind, multicentre study. |journal=The British Journal of Dermatology |date=June 1994 |volume=130 |issue=6 |pages=757–764 |doi=10.1111/j.1365-2133.1994.tb03414.x |pmid=8011502|s2cid=25066444 }}</ref><ref>{{cite journal |last1=Callaway |first1=J |last2=Schwab |first2=U |last3=Harvima |first3=I |last4=Halonen |first4=P |last5=Mykkänen |first5=O |last6=Hyvönen |first6=P |last7=Järvinen |first7=T |title=Efficacy of dietary hempseed oil in patients with atopic dermatitis. |journal=The Journal of Dermatological Treatment |date=April 2005 |volume=16 |issue=2 |pages=87–94 |doi=10.1080/09546630510035832 |pmid=16019622|s2cid=18445488 }}</ref>
* [[Corn oil]]: [[Linoleic acid]] (LA)
* [[Fish oil]]: [[Eicosapentaenoic acid]] (EPA) and [[docosahexaenoic acid]] (DHA)
* [[Hemp seed oil]]: [[Linoleic acid]] (LA), and [[alpha-Linolenic acid]] (ALA)

In the 1950s Arild Hansen showed that infants fed [[skimmed milk]] developed essential fatty acid deficiency which was characterized by an increased food intake, poor growth, and a scaly dermatitis, and was cured by the administration of [[corn oil]].