12WBT & supply

[PumpkinZulu]

I did two rounds at the start of last year and my supply was fine. If you feel like you're not eating enough, add more snacks or increase your portions.

[onthefly]

So long as your intake of calories and fluids are not compromised, and you continue feeding your baby when and as long as your baby requires, then it should be fine. The key to maintaining supply is to ensure your baby continues to take what they need.