In my opinion, when you find a certain therapy being criticized as being unproven quackery, then that is a pretty good sign that the alternative therapy is effective and safe. Big pharma would not waste their time preparing reports designed to warn people against using an alternative therapy unless that therapy is effective and has the potential for being a threat to their monopoly.
Teas are a great way to get the benefits of sage all you need to do is steep one teaspoon of sage in a cup of water for about 10 minutes. You can also make a pretty awesome sore throat reliever by combining sage and thyme. Take an ounce of both grind them, and cover them with 16 ounces of apple cider vinegar. Be sure to shake it periodically and let it sit for ten days before using.