text: Psoriasis Diets supplemented with cod liver oil have shown beneficial
  effects on psoriasis.
  Pregnancy
  Some studies reported better psychomotor development at 30 months of age in infants whose mothers received fish oil supplements for the first four months of lactation. In addition, five-year-old children whose mothers received modest algae based docosahexaenoic acid supplementation for the first 4 months of breastfeeding performed better on a test of sustained attention. This suggests that docosahexaenoic acid intake during early infancy confers long-term benefits on specific aspects of neurodevelopment.
  In addition, provision of fish oil during pregnancy may reduce an infant's sensitization to common food allergens and reduce the prevalence and severity of certain skin diseases in the first year of life. This effect may persist until adolescence with a reduction in prevalence and/or severity of eczema, hay fever and asthma.
  Crohn's disease
  A 2014 Cochrane review found that, based on two large studies, fish oil supplements did not appear to be effective for maintenance of remission in Crohn's disease.
  Supplements
  Fish oil is a commonly used dietary supplement, with sales in the US alone reaching $976 million in 2009. By 2020 the global omega-3 supplement market size had reached $5.58 billion, and fish oil based supplements accounted for 63.1% of that market.