[s_y_n_t_a_x]

Probably a memory of the taste and the vitamins that follow it.

My wife craves mints when she's low on iron.

[samstave]

But do mints provide any iron?

[bjoli]

If they are fortified they do, or better up if they are some kind of mint-flavoured supplements.

[s_y_n_t_a_x]

Depends on which kinds. Spearmint can contain up to 15% of your DV of iron.