Take cancer, for example. If you were to take only the traditional western approach to treating cancer, you would simply concern yourself with your chemotherapy and nothing else. Chemotherapies are designed to attack the cancer and only the cancer, while doing little or no damage to other parts of the body. And, your doctor will tell you that's a small price to pay for getting rid of the cancer, so grin and bear it. Chemo is usually administered in a sterile medical environment where there is little concern for anything other than a swift and efficient infusion of the chemo.
Little concern is shown for the many other things a patient of chemo can experience.
In other words holistic isn't a product or a tangible substance that you can actually take, it's a philosophy. You can't really think of an herb or a specific treatment as holistic in and of itself. Many people regularly work out at a gym or take an aerobics or yoga class every week. Some just go out dancin' every weekend. Many PWAs find that some form of individual mental health counseling or therapy coupled with at least one good support group on a weekly basis is an important component of an holistic approach.