Every Dietitian is a Nutritionist, but not Every Nutritionist is a Dietitian.
Registered Dietitians Nutritionists (RDNs) are highly regulated, credentialed healthcare professionals authorized to treat medical conditions using medical nutrition therapy. In contrast, a “nutritionist” is a broad, largely unregulated title; while some hold advanced degrees, others lack formal training, making RDNs the safer choice for medical needs
 are highly regulated, credentialed healthcare professionals authorized to treat medical conditions using medical nutrition therapy. In contrast, a “nutritionist” is a broad, largely unregulated title; while some hold advanced degrees, others lack formal training, making RDNs the safer choice for medical needs){kind=link}