100% spore-based Bacillus clausii probiotics for digestive health. Supports gut diversity and maintenance of key commensal flora, helping to relieve occasional gas and acidity. No refrigeration required — travel-friendly probiotic support for the whole family. Suitable for women, men, teens, and children age 5 and up. Immunobasics Bacillus clausii is the number 1 probiotic recommended by gastroenterologists.