Effects of Family-Based Health Behavior Development Program on Obesity Risk Factors and Body Mass Index in Obese and Overweight Primary School Children: A Randomized Controlled Trial

Inclusion Criteria: * Mothers must be the primary provider of nutrition at home, * The child must be in fourth grade, * Mothers must be open to and accept communication via email, SMS, and WhatsApp. Exclusion Criteria: * Children with genetic disorders: Prader-Willi syndrome, Laurence-Moon-Biedl syndrome, Down syndrome, Cohen syndrome, Carpenter syndrome, Alstrom syndrome, Cowden syndrome, Turner syndrome, and other genetic diseases that cause obesity. * Children with endocrine disorders: Cushing syndrome, growth hormone deficiency, hypothyroidism, hypothalamic disorders, insulinoma, hypogonadal syndromes, and polycystic ovary syndrome. * Children with psychological disorders: Children taking lithium, tricyclic antidepressants, and other psychiatric disorders. * Children with hypertension and chronic conditions. * Children taking medications that cause obesity, including glucocorticoids, estrogen, and progesterone. * Children with a BMI \<85th percentile. * Mothers who do not speak advanced Turkish (this is intended to prevent potential communication problems due to Turkey being a country with high immigration).