Eat to live and not live to eat

For the last 2 months, I've been surviving on low salt,low protein, low phosphorus and low potassium meals (except for the occasional restaurant food like the mini Japanese curry rice), I've lost 4 kg of body weight. I am on the above special meals not to lose weight but due to my low kidney filtration rate or GFR of 54.
In my next medical checkup, I hope to see my GFR going up, say to 60+

I'm having kidney issues

My latest medical checks shows my kidney function is not doing too good. The eGFR (estimated Glomerular Filteration Rate) is 54 which means my kidney is functioning at half a normal person's. In this respect, my doctor has advised me to eat less salty and processed food. I am also told not to eat too much protein food like meat and fish. Also, I must not overeat. I also feel a need to lose some of my body weight.
So this may explain why the pictures of food that I consumed are in small portion and blend.
If I ignore the doctor's advice and continue eating the way I was, my kidneys may failed to function and I need to be placed on dialysis.