She has been a part of many research projects specially focusing on validating food frequency questionnaires to assess food and nutrient intake. She was the co-investigator of the research study looking at the role of soy and isoflavones on the pubertal onset of boys and girls, the associations between diet, physical activity and sleep on the health status (anthropometric) of adolescents, and validation of food frequency questionnaires. As a researcher in the HAT trial, Dr. Siapco will primarily be responsible for the dietary assessment aspect of the study, using 24-hour diet recalls. She will be training the clinicians who will be conducting the 24-hour diet recalls.