This study aims to examining the effectiveness of a psychoeducational program (Healthy Eating in Young Adults; HEYA) on improving the dietary habits and body composition (e.g. weight and percentage fat mass) in young adults in Singapore.

Inclusion Criteria:

1. have a body mass index (BMI) ≥23kg/m2; and
2. are between the ages of 21 and 35 years old; and
3. can understand and read the English language; and
4. use a smartphone that can download apps; and
5. willing to travel to the National University Singapore.

Exclusion Criteria:

1. Pregnant or lactating; and
2. Participating in a structured weight loss program; and
3. Planning or receiving pharmacotherapy or bariatric surgery within the next 6 months; and
4. Has existing diagnosed mental disorder besides eating disorders.