I used them to a great success with my baby.
I had read the studies done on colic and probiotics and searched out the one that they used. it can be bought here
I tried to use the powder form of the same probiotic (Lactobacillus reuteri)
but it was very difficult to get her to take it- I had to mix it with a little bm in a little cup and measure and all- the drops are a bit pricer but so worth it for the convenience.
My DD was so colicy and cranky. We started the probiotics and I cut eggs, Dairy, and citrus out of my diet completely. Like night and day- she was a completely different child. So calm and happy, still a hold me girl though
I started adding in small amounts of dairy when she was 6 months, and eat small amounts still with no problems. No eggs or citrus for me yet though. Oh and She (at a year) can not eat even small amounts of these foods without problems.