The Impact of Fish Oil Supplementation on Self-Perception of the Voice in Vocal Performers: A Randomized, Single-Blind, Placebo-Controlled Study

Purpose: Physically active adults have experienced training benefits from fish oil--derived omega-3 fatty acid (FO n3), which may also be of benefit to singers. The purpose of this research study was to determine if self-reported vocal adaptations and body composition changes occur in singers following FO n3 supplementation in conjunction with a singer's normal training regimen. Method: Twenty college students, currently enrolled in vocal lessons at a university, were randomized to receive either 3.0 g of FO n3 or placebo, which they took during a 10-week study period. Participants were blinded to group assignment. Participants completed the Reflux Symptom Index (RSI), Singing Voice Handicap Index-10 (SVHI-10), and the Evaluation of Ability to Sing Easily (EASE) and submitted to body composition measures (weight, skeletal mass, and body fat mass) before and after the study period. Results: Sixteen participants completed all parts of the study protocol. Mean compliance for the placebo group (83.9%) and the supplement group (75.2%) was similar. There were no significant differences in body composition measures, RSI scores, and EASE scores between groups. Scores on the SVHI-10 decreased significantly over time for all participants. Conclusions: Improvements seen in the SVHI-10 were not meaningfully different between the supplement and placebo group, pointing to the benefit of weekly lessons. The lack of changes in the questionnaire scores in the supplement group are partially attributed to the low compliance rate and low sample size, which is supported by the lack of change in the body composition measures.