noun
Academic field studying the therapeutic use of diet and nutrition in medical treatment.
彼女は大学で食事療法学を専攻している。
She is majoring in dietetics at university.
栄養学 is the broader study of nutrition, while 食事療法学 specifically focuses on dietary therapy in clinical settings.
Compound of 食事 (meal, diet), 療法 (therapy, treatment), and 学 (study, -ology).