Did anything come down to us in the Prophetic Sunnah concerning the preservation of health, skin, and hair, and what did the Prophet, peace and blessings be upon him, and his household (such as Aisha, Khadijah, and Fatimah, may Allah be pleased with them) do to live a healthy life?

The Prophet, peace and blessings be upon him, maintained his health in four ways: Ruqyah (exorcism) with the Quran and legitimate incantations, supplication and seeking well-being, disease prevention, and treatment with what Allah taught him.

The Prophet, peace and blessings be upon him, took care of his hair by washing, combing, and oiling it. He encouraged honoring the hair and used oil. He also applied kohl (antimony) to his eyes, which improves vision and promotes hair growth.

For those who desire details, it is recommended to refer to the book "Zad al-Ma'ad fi Hady Khair al-'Ibad" by Ibn al-Qayyim, and "Al-Adab al-Shar'iyyah" by Ibn Muflih al-Hanbali.

The concern for the afterlife should be paramount, for whoever makes his concerns a single concern, which is the concern for his afterlife, Allah will suffice him for the concerns of his worldly life.