Why do we feel so hungry before periods?

My usual weight is 49, but I was losing weight and getting close to my target weight of 47, but today I felt awful craving for pizza, so I ordered a big pizza and ate all of it.

Then I checked and seems like I am going to get my period 3 days later. I guess that’s why I wanted to eat. I feel so guilty for eating so much on my way of losing weight.

My friend is the same, she gets awful cravings before periods and she buys lots of sweets, candies and jellybeans about 3-4 days before period. Why’s that?

And do you or your partner experience the same?

Why do we feel so hungry before periods?
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