10 Risk Factors for Inflammatory Bowel Disease - Bacteria in the colon The gastrointestinal tract contains trillions of bacteria that help digest your food. These are "good" germs. However, infections with "bad" germs, such as salmonella and campylobacter, have been associated with a greater risk of IBD. Both types of bacteria can be ingested through contaminated food, and they are responsible for thousands of cases of food poisoning each year.
10 Risk Factors for Inflammatory Bowel Disease - Age Although there is a spike in new IBD cases in people ages 50 to 60, most patients are diagnosed as adolescents or young adults. And pediatricians believe there is a decrease in age of onset, says Dr. Sartor. About 15% of IBD patients develop it before age 18.
10 Risk Factors for Inflammatory Bowel Disease - Medication Environmental exposures that affect the risk of IBD may include medication. For example, some research has linked long-term oral contraceptive use to a higher risk of both UC and Crohn’s disease, and long-term hormone replacement therapy to a higher risk for Crohn’s.
A growing body of research suggests that not only may vitamin D deficiency be a risk factor for rheumatoid arthritis, it may also make rheumatoid arthritis patients significantly more susceptible to cardiovascular disease. http://www.naturalnews.com/040699_rheumatoid_arthritis_vitamin_d_deficiency_cardiovascular_disease.html