noun
dietitian; nutritionist
A professional who studies or advises on nutrition; often used in academic or clinical contexts.
彼女は病院で働く栄養学者です。
She is a dietitian working at a hospital.
栄養士 is a more common term for a nutritionist or dietitian, often referring to a licensed professional, while 栄養学者 emphasizes the academic or research aspect.
Compound of 栄養 (nutrition) + 学者 (scholar, academic).