This is probably not recommended, however, I started the Tony Ferguson diet about 2 months ago and it hasnt affected my milk supply. If anything, I have more milk. I guess its the high protien? I have an 11 month old though, so I dont have as many feeds during the day as you would. Good luck with your dieting though!! I am 35kgs down (since I had bub) and 5 more to go!! Cant wait!