Lactobacillus Johnsonii in Children and Adolescents With T1D

Inclusion Criteria: * have confirmed T1D by physician diagnosis * have normal values at screening for complete blood count (CBC) and complete metabolic profiles (with the exception of fasting glucose and HbA1c) * are able to swallow a capsule * are willing to complete weekly online questionnaires * are willing to consume a probiotic * are willing to provide stool samples throughout the study * are willing to provide blood samples throughout the study * are willing to take three stimulated C-peptide tests * are able to access a computer with Internet throughout the study Exclusion Criteria: * being treated for any diseases or illnesses such as gastrointestinal disease (gastric ulcers, Crohn's disease, ulcerative colitis, etc.) * being treated for chronic kidney disease * have had or are currently being treated for other immune-compromising diseases or conditions (HIV, AIDS, hepatitis, cancer, leukemia, organ transplant, Lupus, DiGeorge syndrome, selective deficiency of Immunoglobulin A (IgA), Bruton's disease etc.) * have an underlying structural heart disease * currently live with an immunocompromised person * are currently taking medications for constipation and/or diarrhea * have taken antibiotics within the past 2 weeks prior to randomization * are currently taking a probiotic supplement and are unwilling to discontinue it a minimum of 2 weeks prior to the study start * are a current smoker * are currently pregnant or lactating or a female who plans to become pregnant in the next 6 months * have a known allergy to milk or milk protein.