Letter to “Female Underweight/Undernutrition Syndrome ( FUS ): An Emerging Health Concept in Premenopausal Women—Secondary Publication (English Translation of the Japanese Statement)”

bone health | female underweight/undernutrition syndrome | functional hypothalamic amenorrhea | FUS | low energy availability | premenopausal women | undernutrition | underweight Tamura et al. [1] proposed female underweight/undernutrition syndrome (FUS) as an emerging clinical concept encompassing diseases, symptoms, and signs arising in premenopausal women against a background of underweight or undernutrition.The proposed phenotype extends beyond body mass index (BMI) to include