The goal of this interventional study is to determine whether reducing ultra-processed food consumption in children and adolescents can improve cognitive function. The main question it aims to answer is:

Does reducing ultra-processed food consumption through online nutritional education improve cognitive function in children and adolescents with attention difficulties? Researchers will compare a nutritional education group to a non-intervention group to assess whether reducing ultra-processed food intake leads to cognitive improvement.

Participants will:

Attend a weekly online nutritional education course for 12 weeks Be encouraged to replace ultra-processed foods with whole foods

Inclusion Criteria:

• Participants must meet all of the following conditions:

Age: 10-15 years old. Attention difficulties: Diagnosed with attention deficit hyperactivity disorder (ADHD) or identified as having learning difficulties based on a specialist's or teacher's recommendation.

Ultra-processed food consumption: Consumes at least six types or six servings of ultra-processed foods daily.

Exclusion Criteria:

• Younger than 10 years old or older than 15 years old.