system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is microwaved food bad for you?

My parents always tell me that microwaving food is bad, but they don't know why. I've heard some myths about the change in the molecular structure, but don't quite get it.
gpt
It isn't bad. Microwave cooking isn't voodoo magic. It's just a particular way of transferring heat into food.

There are three ways to get food hot. There's conduction, convection and radiation.

When you heat up a pan, then plop a steak down in it, the surface of the steak that touches the pan gets really hot really quickly. That's conductive heat.

When you heat up your oven, then stick a blob of bread dough into it, the hot air in the oven transfers heat to the dough and turns it into a loaf of bread. That's convective heat.

When you draw a glass of water from the tap and then set it down in the sun, you'll come back later to find it warm, maybe even warmer than room temperature. The light from the sun is streaming through the glass, bumping into water molecules and other things, and causing the water to heat up. That's radiative heat.

Microwave cooking is just like leaving a glass of water in the sun … only instead of the sun, we have an artificial source of microwaves. The light from the microwave source is way more intense than sunlight, so as it passes through the food it bumps into big molecules — water molecules, mostly — and heats them up.

Microwaved food isn't bad for you.