How I Introduced Allergens to My Baby

Introducing allergens was one of those parts of starting solids that made me a little nervous the first time around. Peanut butter? Egg? Dairy? These are foods you spend months hearing about as potential allergens, and then suddenly you’re supposed to intentionally give them to your baby.

I ended up approaching allergen introduction completely differently with my two kids. With my first, I introduced allergens using the actual foods as soon as we started solids. With my second, I used Ready, Set, Food! because she wasn’t developmentally ready for solids yet, but our pediatrician had cleared us to begin allergen introduction using the powder.

Both approaches worked well for us, and after doing it both ways, I really think this is one of those areas where there doesn’t have to be one perfect method.

A quick note before we get into it: I’m a mom sharing what worked for my family, not a pediatrician or allergist. Talk to your pediatrician about when and how to introduce allergens, especially if your baby has eczema, an existing food allergy, a family history of allergies, or other risk factors.

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Why I Wanted to Introduce Allergens Early

The recommendations around allergens have changed from what many of us grew up hearing. Rather than automatically delaying foods like peanut and egg, current guidance supports introducing allergenic foods during infancy once a baby is developmentally ready for them. Research on peanut in particular has shown that early and continued exposure can reduce the risk of developing peanut allergy in certain babies.

That was something I wanted to be proactive about with both of my kids.

I talked to our pediatrician before introducing allergens with each baby, and I definitely recommend doing the same. Your pediatrician knows your baby’s medical history and can tell you whether there is anything you should do differently.

How I Introduced Allergens With My First Baby

With my first, we started solids around four months after getting the go ahead from our pediatrician. Once we started solids, I started introducing allergens too.

I kept it incredibly simple.

For peanuts, I put a tiny amount of peanut butter on my finger and let him taste it from my finger. I took a similar approach with egg and introduced dairy through foods like cheese.

I wasn’t using a special system or keeping an elaborate spreadsheet. I was simply introducing the actual foods in small amounts as we started exploring solids.

One thing I did intentionally was introduce allergens earlier in the day. I didn't want to give him a new allergen immediately before bedtime and then spend the night wondering if something was happening. Giving it in the morning gave me the rest of the day to keep an eye on him.

Thankfully, we never had an issue.

Current guidance recommends offering allergenic foods in developmentally appropriate forms and textures. Whole peanuts, for example, are a choking hazard for babies and young children, and thick spoonfuls of peanut butter aren't appropriate for an infant either. Talk to your pediatrician about safe preparation for your baby's age and feeding abilities. Solid Starts is a great resource as well.

Why I Did It Differently With My Second Baby

My second baby had a different timeline.

At six months old, she had not yet been cleared to start solids because we were still waiting for stronger head and neck control. I didn't want to rush solids before she was developmentally ready, but I also wanted to talk to our pediatrician about allergen introduction.

Our pediatrician gave us the okay to use Ready, Set, Food!, which is a powdered allergen introduction product that could be mixed into her bottle.

That gave us an option I hadn't really needed with my first.

I had actually heard about Ready, Set, Food! years earlier in my mom group. Several moms were using it when our first babies were little, so I was already familiar with the concept. This time, it made a lot more sense for our situation.

What Using Ready, Set, Food! Was Like

It was honestly pretty easy.

We added the powder to her first bottle of the day, swirled it into the bottle and fed her normally. I liked doing it with her first bottle because, just like I had done with whole foods with my first, I wanted plenty of time during the day to monitor her afterward.

There is an extra step involved. You have to remember to make the bottle, add the powder and stay consistent with it.

But I was already making a separate bottle every day for her vitamins, so adding another little task to our routine wasn't a big deal. Once it became part of our morning routine, I didn't really think about it.

We didn't have any allergic reactions.

There was one day when we noticed red blotches on her chest and immediately wondered if we were looking at hives. It turned out not to be an allergic reaction, but it definitely reminded me why introducing allergens can feel so intimidating as a parent.

Whole Foods vs. Ready, Set, Food!: Which Would I Choose?

After doing both, I genuinely don't think there is one answer that is right for every family.

Introducing the actual food was probably the simplest option for us. If your baby is already eating solids and your pediatrician has cleared you to introduce allergens, you may not feel like you need another product or another step in your routine.

On the other hand, I completely understand why some parents prefer something like Ready, Set, Food!.

Introducing allergens can be scary. I was nervous about it too.

Having a structured system can make the process feel a little less intimidating, especially if you're someone who would otherwise find yourself putting off introducing certain foods because you're nervous about a reaction.

For us, it was particularly helpful because my second baby wasn't ready for solids yet and our pediatrician specifically approved this approach for her.

If a friend asked me which way she should do it, I'd explain both options. You can introduce allergens through actual foods in safe, age appropriate forms, or you can ask your pediatrician about whether an allergen introduction product makes sense for your baby.

I don't think you need to make it more complicated than it needs to be.

What If You're Really Nervous About Introducing Allergens?

Talk to your pediatrician.

I can't emphasize this enough, especially if there is a history of food allergies in your family or your baby has other risk factors.

My brother in law has a peanut allergy, and my sister was understandably nervous about introducing peanuts to her baby. She talked to her pediatrician and ended up doing the peanut introduction at the pediatrician's office.

I think that's a great reminder that you don't have to force yourself to do something at home if you're really uncomfortable. Depending on your baby's individual risk factors, your pediatrician may recommend a specific introduction plan, testing or supervised introduction.

Babies with severe eczema, egg allergy or other factors that put them at higher risk for peanut allergy may need a different approach, so this is definitely something to discuss with your baby's doctor.

What I'm Doing Now That My Baby Has Started Solids

Now that my second baby has been cleared to start solids, I'm not planning to rely solely on the powder forever.

I want the common allergens to become normal parts of her diet, so I'll continue incorporating them into the foods she eats in safe, age appropriate forms.

That's also something I didn't fully appreciate the first time around. Introducing an allergen once isn't necessarily the end of the story. Current guidance encourages keeping tolerated allergenic foods in a baby's diet routinely.

My Biggest Takeaway

I introduced allergens two completely different ways with my two babies, and both approaches worked well for us.

With my first, I used actual foods from the beginning. With my second, Ready, Set, Food! gave us a way to start allergen introduction with our pediatrician's approval while we were still waiting for her to be ready for solids.

If you're approaching this stage and feeling nervous, you don't have to figure it out entirely on your own. Talk to your pediatrician, ask about your baby's individual risk factors and choose an approach that feels manageable for your family.

And if you're staring at the peanut butter wondering how you're supposed to casually give your baby something you've spent months worrying about, I get it. That part felt scary to me too.

Frequently Asked Questions

When should I introduce allergens to my baby?

Timing can depend on your baby's development and individual allergy risk. Current American Academy of Pediatrics guidance says there is no evidence that delaying allergenic foods prevents food allergies. Once babies are developmentally ready for solids, common allergens can be introduced in safe, age appropriate forms. Peanuts may be recommended as early as 4 to 6 months for certain babies, particularly those at higher risk, but those babies should have an individualized plan from their healthcare provider.

What allergens should I introduce to my baby?

Common food allergens include milk, egg, peanut, tree nuts, wheat, soy, sesame, fish and shellfish. Ask your pediatrician about which foods to introduce, when to introduce them and the safest forms for your baby's developmental stage. Ready. Set. Food! incorporates peanut, egg and milk allergens into their stage 1 powder.

Should I introduce allergens in the morning?

I personally introduced new allergens earlier in the day because it made me more comfortable knowing I could monitor my babies afterward. Ask your pediatrician what they recommend for your baby and what symptoms you should watch for.

Can I use Ready, Set, Food! instead of whole foods?

I used Ready, Set, Food! with my second baby after discussing it with our pediatrician because she had not yet been cleared for solids. Once she started eating solids, I planned to incorporate the actual foods into her diet regularly as well. Whether an allergen introduction product is appropriate for your baby is something I'd discuss with your pediatrician.

What should I do if my baby has a reaction to a food?

Stop feeding the suspected food and contact your child's healthcare provider for guidance. Allergic reactions can vary in severity, and severe reactions can be life threatening. Before beginning allergen introduction, ask your pediatrician what symptoms to watch for and what you should do if you suspect a reaction. If your baby develops symptoms of a severe allergic reaction, seek emergency medical care immediately.

Do I need to keep giving an allergen after my baby tolerates it?

Current guidance generally encourages keeping tolerated allergenic foods in a baby's diet routinely rather than treating introduction as a one time event. Your pediatrician can help you determine appropriate foods, amounts and frequency for your baby.

This article is based on my personal experience and is for informational purposes only. It is not medical advice. Always talk to your pediatrician or other qualified healthcare professional about your baby's feeding, allergen introduction and individual allergy risk.

Check out our article here about everything you need to start solids.