Lemongrass, is a super-grass. To name only a few properties, studies(1) show that it reduces the absorption of cholesterol from food consumed, plus it actively oxidises LDL-cholesterol which in turn reduces the risk of atherosclerotic plaque, stroke and heart disease. Lemongrass contains an active compound called "citral" (among many others) which studies(2) have identified as inhibiting the growth of some types of cancer. In particular, scientists have observed citral causing cancer cells to die (apoptosis) while keeping healthy cells untouched in breast cancer cases. This effect is so prolific that some countries, like Israel, are prescribing Lemongrass tea as part of the treatment for patients undergoing traditional cancer therapy.
Lemon Myrtle is a native Australia botanical that we are only just beginning to discover in the West (although it has been used for a long time by Australian Aboriginal people). Scientists(3) have found potent anti-viral, anti-bacterial and antioxidant properties, demonstrating its ability to reduce the recovery time for viral diseases as well as being able to regrow connective tissue, reducing effects of aging and cellulite.
Ginger is an ancient Chinese medicine with substantial scientific evidence and thousands of years of experience in it's medical use. A recent study(4) compared ginger’s effectiveness at killing 2 common types of disease-causing bacteria. The findings demonstrated that ginger out-performed the 3 common antibiotics prescribed! To top this all off ginger is also an age old remedy for nausea, especially morning or motion sickness calming the stomach.
3. Biomedicine & Pharmacotherapy, Vol. 58, Issue 4, May 2004, pages 245-247 , http://www.sciencedirect.com/science/article/pii/S2214750014000493