Over-the-counter weight loss supplements are not governed by the Food and Drug Administration (FDA) as pharmaceuticals, and the FDA does not demand premarket evaluation or clearance of these items. Instead, it is the duty of supplement producers to guarantee the safety of their goods and that any statements they make about them are true and do not in any way deceive customers. According to Adarsh Gupta, D.O., director of the Valley Forge Weight Management Center in Norristown, Pennsylvania, weight reduction supplements—which might include over-the-counter medicines, herbs, and other items that claim to stimulate weight loss—should be taken with caution. Dr. Gupta advises using vitamins for weight reduction. He emphasises the importance of this topic, saying that "it is very important for everyone to recognise that these supplements are not approved by the FDA." The sole restriction placed on the supplement is that it cannot assert that it can cure a disease.