I love this website! Check out the attached chart.
However, please don't look at this chart and assume it is the only information I (should) use to decide what to prescribe. I also prescribe based on historical precedent [something has been working for hundreds/thousands of years] and/or clinical results [naturopaths see positive effects, but no one has coughed up the cash for a big research study].
In fact, evidence likes this can often prove just as useful when determining what you might consider NOT taking, such as large doses of calcium to prevent or treat osteoporosis (notice that calcium for this purpose falls below the 'worth it' line for post-menopausal).
Ultimately, this is one of the advantages of consulting a naturopathic doctor. We have the training to sift through the vast amount of information out there and make educated prescription recommendations based on solid clinical experience!
Dr. Dielle Raymond, ND