Hippocrates was born c. 460 bc , island of Cos, Greece.  He died c. 375 , Larissa, Thessaly.  He was the most famous ancient Greek physician who lived during Greece’s Classical period and is traditionally regarded as the father of medicin.
Here are some quotes from him.  Given our current knowledge, how would you say he did?

Let food be thy medicine and medicine be thy food.
Make a habit of two things: to help; or at least to do no harm.
Walking is man’s best medicine.
Natural forces within us are the true healers of disease.
Healing is a matter of time, but it is sometimes also a matter of opportunity.
It is more important to know what sort of person has a disease than to know what sort of disease a person has.
There are in fact two things, science and opinion; the former begets knowledge, the latter…