Bulk herbs are great. It is incredible how much more you pay for packaging when you purchase encapsulated supplements. By shopping at Mountain Rose Herbs, I am not only saving money, but getting high quality organic herbs, and I haven't seen any place that sells organic in capsules. Putting the herb in capsules is sort of a pain, but it's worth it. Of course, the herbs can be used many other ways, including tea, so capsules are not a necessity. Ashwagandha is used in Ayurvedic medicine to strengthen the immune system. It is known as Ayurvedic ginseng and acts to strengthen the entire system. It's an adaptogen, which means it is bidirectional rather than unidirectional, offering the strengthening effects that your particular body needs, and it has no known side effects. I recently read that it works best if used on an occasional "as needed" basis. Like all ginseng, it is good for stress. I have always been very happy with all of Mountain Rose Herbs products and with their service and couldn't recommend them more.