Question: how much weight do you have to lose to notice?
Answer: For a weight change to show up on your face, you'd need to change your BMI by 1.33 points, the study found. That means a woman and man of average height would need to gain or lose eight pounds and nine pounds, respectively. For this study, the average woman was 5 feet 4 inches tall; the average man 5 feet 10 inches.