- Include step 1 (0-6 months), step 2 (6-12 months), step 3 (1-2 years), step 4 (2-6 years).  - 36+ essential nutrients.  - BB-12™ probiotics and FOS for healthy digestion.  - Calcium, Vitamin D3 & K2 for bone and height growth.  - 24h colostrum for immune support.  - DHA, ARA, Choline, Taurine for brain development.