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A consumer satisfaction study was conducted to examine the effectiveness on hangover of After-Effect©, a new food supplement dedicated to improve well-being after an occasion of alcohol consumption. N = 113 persons were invited to participate in a home-based open label study to test the effectiveness of After-Effect©. On a night when they intended to consume alcohol, three pills were taken before alcohol consumption and two pills afterwards, before going to bed. The following day, participants completed a survey on the amount of alcohol consumed, hangover symptom severity, and satisfaction of the product. N = 103 participants completed the study. 88% of participants reported After-Effect© to be effective in reducing alcohol hangover. After-Effect© significantly improved overall hangover severity, and all individual hangover symptoms, except for palpitations. In addition, a significant reduction (P = 0.0001) in the severity score on concentration problems was reported when using After-Effect©. No gender differences were observed, and there was no relationship with the number of alcoholic drinks that were consumed. Consumers were satisfied with the product. In conclusion, consumer satisfaction and hangover severity scores suggest that After-Effect© may be effective in reducing alcohol hangover. However, controlled, double-blind clinical trials should confirm these findings.