At Little P’s 9-month well check, his nurse practitioner confirmed my long-held suspicion that he likely had a milk protein allergy. Starting around 2 weeks, I noticed things about Little P’s feedings that seemed off — mainly that he was very fussy after eating yet he always seemed hungry. He also often projectile vomited and had rashes and explosive diarrhea. It was a cruel cycle of cry, eat, spit up, scream, eat again, scream louder, projectile vomit, refuse to sleep, finally fall asleep, then wake up screaming/ vomiting/ covered in diarrhea.

Around 4 weeks I insisted on bringing him to talk to the pediatrician about a possible milk allergy. Unfortunately we got assigned to our least favorite pediatrician in the practice who told me all babies spit up and that it was very unlikely Little Pea was allergic to dairy (although “if I was really worried about it, I could try eliminating dairy from my diet to ease my mind”). I should have just gone with my gut, but instead I trusted his advice.

Finally after 5 more months of suffering, I took matters into my own hand and tried a sensitive formula. Almost immediately Little P seemed happier. He guzzled his bottles, slept peacefully, and didn’t vomit. Unfortunately a few days later the cruel cycle started again. Thankfully he had his 9-month well check that week, so I came ready to defend my belief that he may be allergic to dairy. And this time our health care provider agreed.

His nurse practitioner suggested trying soy formula and gave us a few samples to take home. I had read online that babies with a cow’s milk protein allergy are also sensitive to soy. But again I trusted our provider and tried soy. At first, the results seemed miraculous. Little P was like a different baby, a happier one that slept and barely fussed! But a few days later the cruel cycle started again.

After a furious middle-of-the-night googling session one night as poor Little P wailed in my arms, I vividly remember sending Mr. P on a mission to find any 24-hour store with Similac Alimentum or Nutramigen in stock. He found one with Similac Alimentum, so we tried that next. It worked great for about a week and then, you guessed it, the cycle of fuss-eat-vomit-cry started again. At that point we were desperate. I reached out to a friend who seems to know everything about babies and their GI tracts, who reached out to an old colleague that graciously advised us to try an amino acid-based, hypoallergenic formula. We tried that and it worked. And kept working!

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I won’t pretend to understand how all this works (as I am definitely not an expert or a health care provider; just a mom with an obsessive information-seeking habit), but this is my basic understanding:

  • Babies are rarely lactose intolerant. If they are sensitive to milk, they likely have an allergy to the cow’s milk protein. The only solution is remove all dairy from their diet completely (and from yours if you’re breastfeeding – we had so many issues feeding Little P that sadly my milk supply had plummeted by the time we figured this out. I actually tried re-lactating but it didn’t work out, so we were left to navigate the world of hypoallergenic formulas).
  • Some babies with milk protein allergies can tolerate soy. But many, including Little P, cannot.
  • Some babies with milk protein allergies can tolerate a hydrosolate, hypoallergenic formula like Similar Alimentum, which breaks down (or hydrolyzes) the milk protein so that the baby’s immune system may not detect the tiny pieces of proteins as being an allergen. I think this tricked Little P’s immune system for a few days but ultimately didn’t worked.
  • Most babies with milk protein allergies can tolerate an amino-acid based, hypoallergenic formula like Neocate or Elacare, which are milk-free and made up of non allergenic amino acids. Little P thankfully did great on Elacare.
  • Most babies outgrow milk protein allergies between 9 months and 2 years. After Little P’s 1st birthday, we gradually started to re-introduce dairy into his diet. We had a few failed attempts but around 13 months he seemed totally fine with dairy. We also re-introduced soy around that time and again he seemed totally fine with it.
  • Hypoallergenic formula is very expensive and hard to find (we could only find Elacare in certain Walgreens or online). In some states (not ours unfortunately), you can get reimbursed by your health insurance provider for the cost, which retails around $50.00 for a 14 oz can. My babies are heavy milk drinkers, so we were literally spending almost $100.00 a week on formula. I am very thankful our family could absorb the cost but have a heightened awareness of the struggles many families face when their little ones have health conditions that require special diets or medication.
  • A lot of babies have milk protein allergies. I know of at least 2 friends with babies close in age to Little P who had same allergy and have since heard from many others who struggled with the same problem. If your baby is very fussy or irritable (especially after feeding), projectile vomits, has diarrhea, breaks out into hives or rashes, is extremely gassy, has blood in his stool, and/or wheezes, he could potentially have a milk protein allergy. Obviously these symptoms can be caused by a lot of things, but it’s worth looking into further and talking to your pediatrician (and keep talking about it if needed).

Ultimately we figured out what was wrong with Little P and fixed it. I am so glad we did because almost immediately he was happier, slept better, ate more, and basically never cried (except when we told him no ha!).

Have you dealt with a similar, frustrating problem trying to figure out what is wrong with your baby? Any other mamas out there with babies that have or had milk protein allergies? Please share your stories!