Shoffel-Havakuk H, Lava CX, Reuven Y, et al. - In this randomized, double-blind, placebo-controlled, crossover trial, researchers sought to evaluate the presence and magnitude of the impact of empirical vitamin B₁₂ injection on the vocal performance of singers. This investigation was performed from November 7, 2017, to November 30, 2018, at an academic voice center among 20 active adult singers (10 men; median age, 22 years [range, 19-42 years]) without dysphonia but with mild vocal symptoms. The authors discovered that the improvement in self-reported voice measures in singers showed no substantial difference compared with placebo after empirical vitamin B₁₂ injection to improve mild voice-related symptoms.