Dim 400mg is the most potent Dim formulation that we have to offer - twice the strength of our original Sm Nutrition Dim 200mg formula. This provides the strongest Dim concentration in just 1 capsule per day. And each bottle of this bulk Dim supplement contains a 3-month Supply! Dim (diindolylmethane) is an extract found in cruciferous vegetables, like broccoli and cauliflower.