I dont think any natural product has been shown to help more than placebo effect, including valerian, which is used a lot by ordinary docs in russia
next problem is widespread disagreement amoungst naturapaths, some say valerian is good, some say its useless, one told me it works for 4 out of 5 but stimulates the 5th
however I wouldnt discourage anyomne who seems to get help from natural or herbal remedies as there are still lots of unknown things about health