The Best Plant-Based Infant Formulas of 2025

Let’s Start Here: It’s Okay to Need Something Different If […]

Heather Taylor
3 min read

Let’s Start Here: It’s Okay to Need Something Different

If you’re looking into soy-based infant formulas, it probably means your baby can’t tolerate dairy—or maybe you’ve chosen a plant-based path as a family. Either way, this isn’t just about ingredients. It’s about finding something that supports your baby’s body, your values, and your peace of mind.

And that can feel like a big ask when you’re sleep-deprived, worried about fussiness, or managing sensitivities. Some of the best baby formulas in the UK and the US are plant-based, and they give your baby all organic nutrients.

There’s no perfect formula. But there are gentle, well-made, plant-based options that many babies do beautifully on. The three formulas below are nutritionally complete, widely available, and thoughtfully made. Each offers something different, so you can choose based on what your baby needs most.

3 Gentle Soy Formulas – Different Strengths, Same Goal: Comfort

Why You Might Choose ItFormulaWhat Makes It Stand OutWhere to Find It
You need something reliable and dairy-freeEnfamil ProSobee Soy Infant FormulaNutritionally complete, widely trusted for gas and milk intoleranceEnfamil ProSobee – Store
You prefer organic and plant-based purityEarth’s Best Organic Soy Infant FormulaUSDA-certified organic, non-GMO, and free from corn syrup or synthetic additivesEarth’s Best Soy – Amazon
Your baby is extra fussy or colickySimilac Soy Isomil Infant FormulaDesigned for digestive sensitivity and includes gentle prebiotics for gut supportSimilac Isomil – Amazon

Enfamil ProSobee Soy Infant Formula

For babies who need a clean, dairy-free base that supports calm digestion

Why families choose it:
ProSobee is often a first stop for families whose babies are showing signs of lactose intolerance or cow’s milk protein sensitivity. It’s fully dairy-free and designed to be easy on developing systems.

What’s inside:

  • Soy protein isolate (provides complete amino acids)
  • DHA & ARA for brain and eye development
  • Iron, choline, and vitamin D

What parents notice:
Babies tend to spit up less, cry less after feedings, and sleep longer stretches. Many say it’s the first formula their baby seemed to really tolerate without discomfort.

Why it helps:
With proper fortification, soy formulas can support growth and development just like cow’s milk–based formulas. And for babies who truly can’t tolerate dairy, this kind of formula offers relief without compromise.

Earth’s Best Organic Soy Infant Formula

For families who want organic, non-GMO, and plant-based peace of mind

Why families love it:
This formula checks every box for parents who prioritize organic standards and simple ingredients. It’s made without dairy, lactose, or corn syrup solids, and it’s USDA-certified organic.

What’s inside:

  • Organic soy protein isolate
  • Organic glucose solids and brown rice syrup
  • DHA, ARA, and iron

What parents notice:
Parents describe babies as calmer and less gassy after switching. Many appreciate the lack of artificial additives, especially if they’re avoiding corn or GMOs.

Why it helps:
For babies who are sensitive, and families who want to stick to organic guidelines, this formula offers a solid nutritional foundation with clean sourcing.

Similac Soy Isomil Infant Formula

Gentle on digestion with added prebiotics for immunity and gut health

Why families choose it:
If your baby seems especially uncomfortable—gassy, colicky, or arching during feeds—this formula might be a good fit. It’s one of the few soy formulas that also includes 2’-FL HMO, a prebiotic modeled after human milk, which supports immune and digestive health.

What’s inside:

  • Soy protein isolate
  • Corn syrup solids and sucrose (lactose-free)
  • DHA, lutein, vitamin E, and 2’-FL HMO

What parents notice:
Parents often report quicker improvements in digestion: less gas, fewer spit-ups, and easier sleep windows. Some say it helped when nothing else did.

Why it helps:
The addition of prebiotics makes a difference in gut balance, especially when paired with a dairy-free protein source. This combo can help reduce inflammation and calm digestion over time.

Final Thoughts: You’re Allowed to Shift, Pause, and Try Again

Feeding isn’t just functional. It’s emotional. Especially when sensitivities or health concerns are involved.

What matters is not whether you picked the “best” formula—it’s whether your baby is comfortable and growing, and whether you feel supported in the process. You can try seed-oil free formulas if your baby rejects the soy-based formulas. If something’s not working, you’re not locked in. Try something else. That’s not giving up. That’s parenting.

These three formulas give you real options. You’re the expert on your baby. And your intuition? That’s just as important as the ingredient list.

Citations