Your baby is getting 400 IU of **Vitamin D3** per drop — exactly the dose the American Academy of Pediatrics recommends for breastfed and partially breastfed infants from birth. This is the cholecalciferol form (D3), which is more effective at raising blood levels than D2, and it's delivered in fractionated coconut oil (MCT) to support absorption since vitamin D is fat-soluble.

At 300 drops per bottle, you're looking at roughly 10 months of daily use — solid value for a single-ingredient liquid. The drop format makes dosing easy and flexible, which matters when you're giving it to an infant who can't swallow capsules.

Keep in mind that 400 IU is the infant recommendation, not a therapeutic adult dose. If you're considering this for yourself, adult clinical research typically uses 1,000–5,000 IU daily. For your baby, though, this delivers exactly what the guidelines call for.