Goodbye, Vitamin by Rachel Khong

Freshly disengaged from her fiancé and feeling that life has not turned out quite the way she planned, thirty-year-old Ruth quits her job, leaves town, and arrives at her parents’ home to find family life more complicated than she’d realized.

Goodbye, Vitamin is the wry, beautifully observed story of a woman at a crossroads, as Ruth and her friends attempt to shore up her father's career; she and her mother obsess over the ambiguous health benefits - in the absence of a cure - of dried jellyfish supplements and vitamin pills; and they all try to forge a new relationship with the brilliant, childlike, irascible man her father has become.