Allah revealed the Qur'an from Himself.
Allah revealed the Qur'an from Himself. It is the words of Allah, which existed before creation, and thus nothing can be added, subtracted or altered. In essence, the Qur'an existed and was complete before the creation of Prophet Mohammed (pbuh&hf), so it could not possibly contain any of the Prophet's own words or advice. An inclusion of such information would clearly contradict the purpose for which the Qur'an exists, compromise its authority and render it inauthentic as a divine revelation.
Consequently, there was no "home remedies" in the Qur'an which one could claim to be outdated; nor does it contain any man's view about what is beneficial to health, what food is best to eat, or what will cure this or that disease. In fact, the Qur'an only mentions one item dealing with medical treatment, and it is not in dispute by anyone. It states that in honey there is healing. And certainly, I do not think that there is anyone who will argue with that!
Prophet Mohammed (pbuh&hf)) and the Qur'an If one assumes that the Qur'an is the product of a man's mind, then one would expect it to reflect some of what was going on in the mind of the man who "composed" it. In fact, certain encyclopaedias and various books claim that the Qur'an was the product of hallucinations that Mohammed underwent. If these claims are true - if it indeed originated from some psychological problems in Mohammed's mind - then evidence of this would be apparent in the Qur'an.
Is there such evidence? In order to determine whether or not there is, one must first identify what things would have been going on in his mind at that time and then search for these thoughts and reflections in the Qur'an. It is common knowledge that Mohammed (pbuh&hf) had a very difficult life.
All of his daughters died before him except one, and he had a wife of several years who was very dear and important to him, who not only proceeded him in death but died at a very critical period of his life. As a matter of fact, she must have been quite a woman because when the first revelation came to him, he ran home to her, afraid. Certainly, even today one would have a hard time trying to find an Arab who would tell you, "I was so afraid that I ran home to my wife." They just aren't that way.
Yet Mohammed (pbuh&hf) felt comfortable enough with his wife to be able to do that. That's how influential and strong woman she was.