Your baby is getting **Limosilactobacillus reuteri DSM 17938** at 100 million CFU — the exact strain and dose used in clinical trials on infant colic, spit-up, and digestive comfort. This is one of the most-studied probiotic strains in pediatric research, with strain-level identification that lets you trace it directly to published trials. The 5-drop liquid format makes dosing straightforward for newborns and infants.

**Vitamin D3** is included at 400 IU (10 mcg), matching the recommended daily intake for infants under 12 months. It's delivered as cholecalciferol in a sunflower oil base, which supports absorption since vitamin D is fat-soluble. For your baby's bone development and immune function during the first year, this covers the baseline.

The probiotic dose of 100 million CFU is clinically appropriate for the specific strain used here, but it's worth knowing this is far lower than the billion-plus CFU counts you'll see on adult probiotics — that's by design for infants, not a shortcoming.