If you put seaweed in your food, especially the sweet, crispy flakes that your aunt bought you in Korea, and then you leave your food in the fridge overnight and then take it to work the next day and add a little water and heat it up, you may find that your food has turned pink. This is--I am pretty sure--from the seaweed. Do not be alarmed.
(On the other hand, if I am found dead later today, don't eat seaweed. Ever.)