During Novel Systemic Treatment for Hair Loss, What Lab Studies Should Be Monitored?

A 32-year-old woman with a history of Hashimoto’s thyroiditis presented with two years of progressive, patchy hair loss. She previously failed topical and intralesional steroids and topical immunotherapy. On examination, she has multifocal, sharply demarcated patches of alopecia on the biparietal and occipital scalp. You decide to initiate a novel systemic treatment for her hair loss disorder and counsel about risk of side effects.