The unit of analysis is a branch of applied statistics students at grade 1-4 years of education, number 2557 (2014) 20 people, Faculty of science and technology, rajamangala University of technology thanyaburi. Tool used to gather information is a questionnaire both 3 times by the questions used in the query in the same subject that meets the objectives of the study by the question: "you have a way to buy quality supplements, however," he said.
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