The Food and Drug Administration (FDA) is a group of grown-ups who make sure that the food and medicine we eat is safe and won't make us sick. They do this by testing and approving new drugs and making sure food companies are following safety rules.
Sometimes, people criticize the FDA because they think they're not doing a good enough job. Some people say the FDA takes too long to approve new drugs, which means sick people have to wait longer for treatments that could help them. Other people worry that the FDA isn't strict enough with food companies and lets unsafe foods get sold to people.
Another reason people criticize the FDA is that they get money from the very companies they're supposed to be regulating. This means it's possible that the FDA might be too friendly with companies and not as focused on protecting people.
Some people also think the FDA should have more power to regulate things like supplements and vitamins, which are often sold without being tested or approved by the FDA.
Overall, people want the FDA to do a really good job so we can trust that the food and medicine we use is safe and healthy. But sometimes people don't think the FDA is doing its best, and they want things to change.