Wheat grass should not cause per se any problem with either chemo or to CKD
. . However wheat grass juice is high in potassium and CKD patients are unable to remove this potassium and develop hyperkalemia
( high potassium) which is dangerous.
medications can be stressful for kidneys should be monitored during and after chemo.
The concept of everything natural is safe is so obviously fallacious - as if there are no poisonous plants or fruits in nature.
All plants are also chemicals - simplest example is sugar (actually a chemical C6H12O6) extracted from sugarcane (natural)