Why hormones are called non nutrient chemicals?

This is as per the latest definition of hormones.
they are non nutrient, having no role in nutrition as nutrients.
they act as messengers.
the latest definition says that they are non nutrient chemical messengers. This allows many new chemicals to be classified as hormones, which include those secreted by organs other than the endocrine gland like Gastro intestinal tract, kidney etc.
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