Some Ans. Questions 2014 by -'Abdu'l-Bahá- 1 Para

Now, the equilibration of these bodily components can be accomplished by one of two means, either through medicines or with foods, and when the constitution has recovered its equilibrium, the illness is banished. Since all the constituent elements of the human body are also found in plants, if one of these components were to become deficient, and if one were to partake of foods that are rich in that component, then equilibrium would be restored and the cure realized. So long as the aim is the equilibration of the component parts of the body, this can be equally effected through medicines or various foods (73:5)

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