I am 65 and doing great on the reboot. Its day 5 for me and the energy really kicked in today. I want to back up a bit and say after the 1st day I felt good on day 2. On day 3 I no longer had those "sick" feelings I normally experience everyday, like feeling heavy, bloated, achy joints, etc. I could feel my blood pressure going down day by day and feeling more and more energized. Fortunately for me I am not on any meds or under a doctors care so I don't have to evaluate what will work with any medications. By the way, I used to take an advil almost daily just so I didn't hurt enough so I could get through my day. I no longer take any over the counter drugs or supplements and feel great.
I say give it a try especially since your doctor seems to have given you the go ahead.
Reading Joe's book "Reboot with Joe Juice Diet" helped me with preparing for the reboot. It also has the different reboots, shopping lists, daily meals list, recipes, etc. Plus lots of helpful information.
I decided to do a combo juice & eating reboot. I find I need extra protein and carbs in my diet and decided along with the juices I will have whole grains, nuts, seeds, and yes low fat dairy. Right now I limit my dairy and will later incorporate lean meats like turkey, chicken and fish in to my diet. But I want to add those after I finish my reboot.
The reboot is helping me lose my appetite for sweet, sugary snacks and salty snacks. I have had a couple of hungry days but I think a lot of that had to do with just starting out. Today I am on day 5 and feeling good and surprisingly light. I have lost 9 lbs in less than a week and feel great. My success so far has been very encouraging as I am sure it will be for you.