Great question! The reality is that without lab testing to back up what is on the label, you will not know exact proportions. lab testing by a reputable lab is the only way you will get an absolute answer. U fortunately, many products are inaccurate in the dosage as the methods of manufacturing may not be consistent and/or the plant itself may be different from batch to batch. Lab test results are always a good idea so you know you have clean medicine. There are many to choose from Steep Hill, CW Labs and so on. I hope this helps.