Most of us are familiar with chamomile, peppermint, rosehip and hibiscus teas. Although they have therapeutic value they are also consumed for relaxation and enjoyment. Other teas like this are made with lemon, honey and ginger. Of course all of these things have proven medicinal value.
Not all medicinal herbs taste awful, but generally we don't take them for enjoyment, but they are used to treat illnesses. One of the mistakes made by studies which prove herbs worthless is that they use a much lower dose than herbal practitioners use. For example in the famous JAMA study proving that Ginkgo does not improve mental performance they used a 40mg daily dose. They bought these pills from some nasty quack who rips people off. In contrast the therapeutic dose is 3g, and some of our products have 6g or even higher than 7g. I have used herbs for a long time, and dose is everything. Certainly a concoction of chinese herbs is usually a bitter, pungent brew made from over 100g of mixed herbs, and boiled down to high concentration.
Other double blind Ginkgo studies using less than 200mg a day did report statistically significant results. What does that tell you? Commonsense and practical knowledge are more powerful than scientific rigour? Lets face it, the ancients discovered herbs long before scientists did.