Milk and dairy
A 2017 study suggests that milk has anti-inflammatory properties, which led to many dietitians recommending it to their arthritis patients. However, dairy products contain a special type of protein that may irritate the tissues around the joints. Because of this, some people with arthritis experience worsening of symptoms after increasing their dairy intake. While the evidence is conflicting, experts recommend that people with arthritis evaluate their symptoms; if dairy seems to exacerbate the condition, eliminate it from the diet.