Do you lose weight when you poop 2 a day?

Yes, in a way depending on the person. If you do not defecate generally every other day you may experience weight gain, stomach cramps and feeling uncomfortable. If you do defecate every other day or every day you should not experience these problems associated to your bowels unless it is something else.

By defecating twice a day this would usually mean that your inner workings are operating fine.