Xanthine in the Diet

Xanthine forms in the human body as a part of the metabolism of purines, substances found in certain meats and yeast products. It also appears in the diet as the caffeine in caffeinated foods and drinks.

Description

Xanthine, an alkaloid normally found in muscle tissue, urine and blood, also occurs in some forms of plant life. Purines degrade into xanthine, which then combines with xanthine oxidase to form uric acid in the body, according to Great Vista Chemicals.

Foods

Caffeine represents a form of xanthine, according to Ask the Dietician. Foods and beverages containing caffeine include chocolate, cola, coffee and tea. Foods high in purine, the precursor to xanthine, include bacon, seafood and yeast-based products such as bread or beer, according to Joint-Pain.com.

Impact on Health

People suffering from gout from excessive uric acid should avoid purine-rich foods. Xanthine in the form of caffeine has a minimal effect on gout, according to Ask the Dietician. It can, however, contribute to gastrointestinal irritation. The Atlantic Coast Gastroenterology Associates recommends patients who suffer from digestive complaints to avoid xanthine.