Who should a nutrition coach refer to if they notice a significant change in a client's gastrointestinal status?

A nutrition coach should refer a client to a gastroenterologist if they notice significant changes in the client's gastrointestinal status. Gastroenterologists specialize in diagnosing and treating conditions related to the digestive system, including issues with the stomach, intestines, liver, and other organs involved in digestion. Such changes may indicate underlying medical conditions that need detailed assessment and specialized treatment beyond the scope of nutrition coaching.

While an endocrinologist primarily focuses on hormonal issues, a sports nutritionist deals with optimizing nutrition for athletic performance, and a dietary technician assists with meal planning and dietary recommendations, none of these roles specifically address issues related to the gastrointestinal tract. Therefore, referring the client to a gastroenterologist is the most appropriate course of action when gastrointestinal concerns arise.