Which of the following is NOT a way to lose iron?

A protein-rich diet is not a way to lose iron, as it can actually contribute to iron intake rather than loss. Foods rich in protein, particularly animal sources such as meat, fish, and poultry, often contain heme iron, which is more readily absorbed by the body compared to non-heme iron found in plant sources. This means that a protein-rich diet can help improve iron levels rather than diminish them.

On the other hand, bowel ischemia, aspirin, and non-steroidal anti-inflammatory drugs (NSAIDs) can contribute to iron loss through various mechanisms. For example, bowel ischemia can lead to gastrointestinal bleeding, which would increase iron loss. Aspirin and NSAIDs can also cause gastrointestinal irritation or ulcers, leading to bleeding and subsequently iron deficiency.