Supplements are supplements

When a lot of people talk about 'supplements,' they mean something like Orovo or a diet pill. I'm not sure exactly when diet pills started taking over the word 'supplement.' It used to mean vitamin pills - something that supplements your diet. For example, I recently started taking Calcium tablets. These would normally be classified as 'supplements' but diet pills have taken over instead. I'm ready to take the word back so it means what it is supposed to mean!