Country Life's Natural Vitamin A and D is derived from fish liver oil, sourced from deep water Atlantic fish such as halibut and cod which are considered to be the best natural source of Vitamins A and D. Suggested Use Adults take one (1) softgel daily with food. Ingredients Serving Size 1 softgel Amount per Serving Vitamin A (from fish liver oil) 10,000 IU Vitamin D (from fish liver oil) 400 IU 100 CT