In the case of vitamins, hormones and antioxidants, in spite of medical evidence which indicates they have salubrious effects on the body, their use is a contentious issue in the healthcare community.
即使連經過醫學驗證有益身體的維生素、荷爾蒙、抗氧化劑等，是否應該服用，或如何服用，也引起保健工作者的爭議。