This trial studies glucosamine and chondroitin in preventing inflammation. Glucosamine and chondroitin often used as a dietary supplement to promote joint health may have a preventive role in inflammation and cancer. This trial may help identify the bacteria that help process them in the gut.

Inclusion Criteria:

- From the Greater Seattle area

Exclusion Criteria:

• Chronic medical illness, history of gastrointestinal, hepatic, or renal disorders, or inflammatory conditions (including autoimmune and inflammatory diseases)
• Pregnancy or lactation
• Currently on a weight-loss diet
• Alcohol intake of greater than 2 drinks/day (2 drinks being equivalent to 720 ml beer, 240 ml wine or 90 ml spirits)
• Current use of prescription or over-the-counter medications other than oral contraceptives and hormone secreting intrauterine device (IUD)s, multivitamin pills or infrequent use of aspirin and nonsteroidal anti-inflammatory drugs (NSAIDs), or use of aspirin or NSAIDs more than 2 days per week
• Abnormal renal, liver or metabolic test
• Inability to swallow pills
• Known allergy to shellfish
• Not willing to take pills made from shellfish or animal sources
• Intention to relocate out of study area within next 2 months
• Any antibiotic use in the past 6 months