ProbioticsI'm a big fan of probiotics for newborns--especially when they show signs of colic.
There was a good study published about this a few years ago...colicky babies were given probiotics or not given probiotics, and the ones who went on probiotics were some large percentage less likely to continue with colic.
It makes sense, if you think about it. Colic can be caused by an imbalance of the correct gut flora. Just like in adults, that causes gas and discomfort. Probiotics help restablish a healthy balance of gut flora, reducing gas and discomfort.
We have given probiotics with our little ones during their first fussy periods...usually around 6-8 weeks, but I wouldn't hesitate to give it sooner. We buy the loose powder (Babydophillus brand, I believe), and I wash my finger, dip it in, then put it on the inside of the baby's mouth and nurse. 3-5 times a day at first, then less often as needed. Works great.