macrobiotic diet helped me to loose weight, before I started with physical activities. It is also very easy to follow, if you do not obsess to much with yin and yang stuff. Just follow simple rules: cooked whole grains, vegetables, beans, nuts, seeds, fruits. You can eat as much as you like, and you will loose weight, without being hungry. Of course, since you are vegan, you will not eat fish, which is allowed in small quantities in macrobiotic diet, mostly for men.
This is macrobiotic cooking Bible, helped me a lot to figure out what to eathttp://www.amazon.com/Aveline-Kushis-Co ... 0446386340
PS: since you have health issues, maybe it is good idea to have macrobiotic consultant/ doctor, but they are very expensive
AND LOW CARB DIETS ARE NONSENSE! (GOOD) CARBS ARE OUR BEST FRIENDS AND MAIN ENERGY SOURCE!