Psoriasis is a lifelong autoimmune skin condition in which the immune system triggers the overproduction of skin cells.
Psoriasis causes red, scaly patches of skin called plaques. Plaques usually appear on the elbows, knees, and scalp, but they can develop anywhere on the body.
Probiotics are beneficial bacteria that are present in yogurt and fermented foods. People can also consume them in supplements.
Having the right balance of bacteria in the body may help the immune system. Psoriasis is an autoimmune disease, so probiotics may be helpful in managing symptoms.
Research has also shown that omega-3 fatty acids, which fish and fish oil supplements often contain, can reduce inflammation and improve autoimmune diseases.
A 2014 meta-analysis found moderate evidence that fish oils might help people with psoriasis, which is both inflammatory and autoimmune.
References:
Balbás, G. M., Regaña, M. S., & Millet, P. U. (2011). Study on the use of omega-3 fatty acids as a therapeutic supplement in treatment of psoriasis. Clinical, cosmetic and investigational dermatology, 4, 73.
Navarro-López, V., Martínez-Andrés, A., Ramírez-Boscá, A., Ruzafa-Costas, B., Núñez-Delegido, E., Carrión-Gutiérrez, M. A., ... & Chumillas-Lidón, S. (2019). Efficacy and safety of oral administration of a mixture of probiotic strains in patients with psoriasis: A randomized controlled clinical trial. Acta dermato-venereologica, 99(11-12), 1078-1084.