Yogurt and GI Health

Participants will be provided with a commercial yogurt that contains only cultured dairy, traditional live active cultures (Streptococcus thermophilus, Lactobacillus delbrueckii subsp. bulgaricus, and possibly other non-brand-specific strains), sugar, and, optionally, vanilla flavor. The yogurt will contain no starches or pectin, gums, fiber or other added ingredients. Participants will be asked to consume two 6-ounce portions of yogurt each day, and to log their consumption in a provided booklet. They will be advised to incorporate the yogurt into their diet however they choose (as part of meals or as snacks), to avoid other fermented foods, and to otherwise maintain their habitual diet.