I've bought this for 3 of my grandkids. The first one that I bought it for, was a VERY drooly baby. His mom had to change his shirts 3-4x per day. A few days after we put the amber necklace on, there was a huge difference in the amount of baby slobber! His mommy said that she, then, could use only a bib and didn't have to change his shirts all day.As for the other two babies, one won't have it...He pulls at it so they need to wait & try again later. My granddaughter was quite young, when we put it on her (2 months old) so she doesn't know any difference. She's now 8 months old & very curious and gets into EVERYTHING she can get her hands on, but she has never noticed her necklace. I'm not sure if it helps, as we're afraid to take it off of her. LolI'm very pleased with the quality of this product!