It could be that IPT synergistically taps into a number of fundamental mechanisms of the human body, including metabolism, blood chemistry, immune function, detoxification, and membrane transport. If this is so, then it would not be so hard to accept that IPT, like good diet and rest, helps in the treatment of such a wide variety of diseases. Perez Garcia do not claim that IPT is a panacea. It only appears to be one, on first impression, because of its diversity of applications. Not all of their patients have been success stories.
Diabetic people require special care based on experience to achieve good results.
People whose liver or immune system is destroyed do not usually do well. Patients too close to death may not have the physical resources to recover, although IPT can reduce their suffering and increase their quality of life in the time that remains. And some diseases and conditions are probably not appropriate for IPT treatment. All these relationships will become clearer as more research is done, and as more doctors try IPT in their practices. In conclusion, then, IPT is not a panacea, but it does appear to be good medicine, and in many cases, better medicine.