Honestly I can feel myself filling up. I previously had the lotus biscuit ones and then delayed and got these to make sure my supply was still there (combination feeding). I had my first smoothie just after a morning feed and writhing 90minutes I could fill myself to be fuller. After feeding baby the lunch time feed she only took 1.5oz (usually 3-4) and then slept for 2 hours. Next feed was 4 hours later. Honestly best thing ever.