Food, supplements and alternative medicines are not “holistic,” they are substances which may be natural.
If you use a natural substance (i.e., an herb), you are using a natural substance, not a “holistic” substance.
Holistic is not defined by the use of one or several substances, natural or otherwise. Instead, holistic is an approach.
The Cambridge Advanced Learner’s Dictionary and Thesaurus defines holistic as “relating to the whole of something or to the total system instead of just to its parts; holistic approaches attempt to treat the whole person, including mind and body, not just the injury or disease.”
Holistic is a way of approaching life, and within that health and well-being.