Vitamin D3 Drops 400IU 30ml by Viridian

What the brand says

Viridikid Vitamin D3 offers a delightful boost of Vitamin D, promoting normal bone, teeth, and immune health. This vegan, plant-sourced vitamin D, derived from lichen, is 100% active and formulated by expert nutritionists. Suitable for use from birth, but avoid additional vitamin D if the infant consumes 500ml or more of formula daily.