Thank you for your recent e-mail.
The current formula of Call of the Wild™ contains 45.5 mg/kg of iodine. Batches can vary depending upon the type of kelp used.
There are 0.326 kg (326 g) of product per bottle of the Call of the Wild™, which would be 14.8 mg of iodine per bottle.
There are approximately 91 teaspoons per bottle, which would be 0.163 mg of iodine per teaspoon. That is how much iodine a pet would be getting from Call of the Wild™ if ingesting 1 teaspoon with a meal.
With regard to evaluation pet foods based upon percentages, see: Does Your Pet Need A % Of Something?
With regard to the iodine inadequacy of modern foods, see: http://www.optimox.com/pics/Iodine/opt_Research_I.shtml
As for feeding amounts, no calculation is needed. It is recommended to add 1 teaspoon of the Call of the Wild™ per 3 oz. of meat/food.