We use S26 Gold. I have used it for all three of my bubs - DD1 did have some constipation, DS was fine, DD2 is about 50% BF and poo is fine! I started with S26G for DD1 as that's what the hospital used, then used it for the others simply because I had used it before. I do remember looking at NanHA for DD1 when it was recommended due to the constipation, but I *think* (it was 8 years ago!) it was much higher in Sodium than S26G and that didn't sit well with me.

The S26G does smell pretty average, but DD2 doesn't seem to mind although she has a definite preference for sweeter BM. OMG... have you ever lost a bottle and found it several weeks later?? The smell is enough to induce vomiting!!