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Why similac step 1 formula leaves foam in the bottle after each feeding?

I'm feeding my 6 weeks old son with similac step 1 formula. Lots of foam was found in the bottle after each feed. I don't know whether the foam will cause colic to my baby. Does anyone encounter the same problem as mine?

Public Comments

1. The 'foam' is just bubbles. It will not cause colic. Try mixing the formula a little bit before you use it if your worried about it.
2. milk does the same thing when you shake it no it will no cause colic
3. all formulas do that.
4. I think it's common with most powdered formulas and happens when you shake it to mix it. The liquid is more expensive but wont do that if you're concerned. What worked for me was a plastic pitcher that had a mixing arm attached so that it stirred it on the bottom with a crank at the top. (I hope that paints a clear enough picture for you.) I think we found it in a baby product catalog but I've seen them in the grocery store since and at Bed, Bath, and Beyond. And when it got to the foam part, I called that bottle done! Good luck!