Simply put, yes, formula can be more filling.
The answer is not what you would imagine. The reason why baby formulas are more filling than breastmilk is because babies can drink MORE of formulas. Breastmilk is limited because its process is fickle, while formulas are measured in bottles to provide an exact amount during each feeding.
Formula can also bring more vitamins to your baby in one feeding session because the ingredients included are exactly measured. In contrast, breastfeeding amounts could change throughout the day and feedings.
Plus, depending on how long baby nurses for, they may only get the foremilk and not the extra-filling nutrients found in the hindmilk. This is why it is important to nurse for at least 10 to 15 minutes.
For mothers who are exclusively pumping, ensure sessions are no less than 15 minutes. If you are supplementing with formula and unable to produce an entire bottle for a feeding session, you should feed your baby breastmilk first. Give them formula second, so they can still receive all the antibodies from the breastmilk and get filled up on the formula.
Some organic baby formulas are made with organic maltodextrin, a natural thickener.The thicker the product, the longer is stays in your baby’s system, allowing them to feel fuller longer. This can be a lifesaver for restless parents.
Additionally, newborns may get longer sleep as they are not hungry in the middle of the night. This is not always the case of course, but it can help many parents. For parents that are supplementing with formula, it might be best to use the formula for night-time feedings and the breastmilk during the day.
Overall, in the organic baby formulas vs. breastmilk debate, formulas have an advantage simply because the ingredients can be modified; however, when breastmilk is fully mixed with hindmilk and foremilk, there might not be much difference. It's difficult to properly study and have a scientific answer to support either side because babies can't tell us if they are full, and they could fuss for any sort of different reasons.