Non-Conventional Medicine & Science.

One of the problems with scientific medicine is that it becomes difficult to develop when the principles don't apply objectively.

For example, principles of proper diet tend to be subjective. Some people are allergic or sensitive to some things, while others are not. Hence, conventional medicine has little to say about diet besides problems that are almost objective such as weight gain, and toxic substances.

Because of that difficulty, scientific support for genuine medicinal facts in subjective areas can be retarded. This problem is aggravated, because FDA approval is dependent on scientific data.

Hence, it may be that alternative medicine fields have knowledge that the general medical community lacks.

In other words, not everything true can be proven.