Jamieson’s Extra Strength Vitamin D3 Chewables are great tasting and deliver 2,500 IU of pure, naturally sourced vitamin D3 to help prevent vitamin D deficiency. This extra strength formula is great way to boost your intake of Vitamin D with a higher potency dose in a convenient single serving. Each chewable provides 2,500 IU of vitamin D3. Helps to prevent vitamin D deficiency. Delicious natural tangy orange flavour. Gluten-free.