Probiotics for Babies
Medically reviewed by Dr. Sarah Chen, MD, FAAP · Board-Certified Pediatrician
Content reviewed against published AAP, WHO guidelines
Last reviewed:
Digestive issues are common in infants and toddlers. If your baby is experiencing probiotics for babies, here is what you need to know.
The short answer
Probiotics are live beneficial bacteria that may help support digestive health. Some research suggests certain strains (especially Lactobacillus reuteri) may help with colic in breastfed babies. However, the evidence is still evolving, and not all probiotic products are the same. Always talk with your pediatrician before starting any probiotic, as they can recommend specific strains and products if appropriate for your baby.
Key takeaways
- Probiotics are live beneficial bacteria that may help support digestive health. Some research suggests certain strains (especially Lactobacillus reuteri) may help with colic in breastfed babies. However, the evidence is still evolving, and not all probiotic products are the same. Always talk with your pediatrician before starting any probiotic, as they can recommend specific strains and products if appropriate for your baby.
- Usually normal when: Your baby has typical digestive patterns and you are curious about probiotics for general wellness
- Call your doctor if: Your baby has a severe allergic reaction after taking a probiotic - swelling, difficulty breathing, or widespread rash
- Varies by age — see the age-by-age breakdown below
“The biggest concern with vomiting is dehydration. Young children can become dehydrated quickly, so it's important to replace fluids. Offer small amounts of an oral rehydration solution frequently.”
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What Parents Should Know
According to AAP, WHO guidelines, probiotics are live beneficial bacteria that may help support digestive health. Some research suggests certain strains (especially Lactobacillus reuteri) may help with colic in breastfed babies. However, the evidence is still evolving, and not all probiotic products are the same. Always talk with your pediatrician before starting any probiotic, as they can recommend specific strains and products if appropriate for your baby. At 0-3 months, this is when colic peaks and many parents consider probiotics. Some studies show that Lactobacillus reuteri may reduce crying time in breastfed colicky babies. Evidence is less clear for formula-fed babies. Probiotics are generally considered safe for healthy, full-term infants, but always consult your pediatrician first, especially for premature babies or those with immune concerns. It is generally considered normal when your baby has typical digestive patterns and you are curious about probiotics for general wellness. However, you should contact your pediatrician promptly if your baby has a severe allergic reaction after taking a probiotic - swelling, difficulty breathing, or widespread rash.
Normal vs. Concerning
By Age
What to expect by age
0-3 months
This is when colic peaks and many parents consider probiotics. Some studies show that Lactobacillus reuteri may reduce crying time in breastfed colicky babies. Evidence is less clear for formula-fed babies. Probiotics are generally considered safe for healthy, full-term infants, but always consult your pediatrician first, especially for premature babies or those with immune concerns.
3-6 months
As colic typically improves, the need for probiotics may decrease. If your baby has ongoing digestive discomfort like excessive gas or irregular stools, probiotics may still be discussed with your doctor. The most studied infant strains include Lactobacillus reuteri and Bifidobacterium infantis. Probiotics are not regulated like medications, so choose products specifically designed for infants.
6-12 months
As solids are introduced, your baby's gut microbiome is rapidly diversifying naturally through food exposure. Fermented foods like plain whole milk yogurt (after 6 months) contain natural probiotics and are generally a good way to support gut health. If your baby is on antibiotics, your pediatrician may recommend a probiotic to prevent antibiotic-associated diarrhea.
1-3 years
Toddlers can get probiotics through foods like yogurt, kefir, and certain cheeses. Probiotic supplements may be recommended during or after antibiotic courses. For toddlers with chronic constipation or recurrent diarrhea, some studies suggest probiotics may help, though results are mixed. Work with your pediatrician to determine if a specific probiotic would benefit your child.
What to Tell Your Pediatrician
- Describe when you first noticed probiotics for babies and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you want to start a probiotic and need guidance on which strain and product to choose.
- Mention if your baby has persistent digestive issues that are not improving with standard care.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Your baby has typical digestive patterns and you are curious about probiotics for general wellness
- Mild gas or occasional fussiness that is part of normal digestive development
- Your pediatrician suggests trying a probiotic for a specific concern like colic
- Your baby is taking antibiotics and your doctor recommends a probiotic alongside
- You want to start a probiotic and need guidance on which strain and product to choose
- Your baby has persistent digestive issues that are not improving with standard care
- Your baby has any immune system concerns or was born prematurely - probiotics should only be used under medical guidance
- Your baby has a severe allergic reaction after taking a probiotic - swelling, difficulty breathing, or widespread rash
- Your immunocompromised baby develops fever or worsening symptoms after starting probiotics
What You Can Do at Home
- Keep track of when you notice probiotics for babies — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your baby has typical digestive patterns and you are curious about probiotics for general wellness — this is generally within the range of normal.
- At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Keep your baby upright for 20-30 minutes after feeding. Note any patterns between feeds and symptoms.
- While monitoring at home, seek immediate care if your baby has a severe allergic reaction after taking a probiotic - swelling, difficulty breathing, or widespread rash.
Related Resources
Poop Color & Texture Guide
What your baby's poop color and consistency mean, and when to worry.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is probiotics for babies normal?
When should I call the doctor about probiotics for babies?
When is probiotics for babies normal?
What causes probiotics for babies?
What should I mention to my pediatrician about probiotics for babies?
Is probiotics for babies normal at 0-3 months?
Is probiotics for babies normal at 3-6 months?
Should I go to the ER for probiotics for babies?
Does probiotics for babies go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Probiotics for Babies.
Things to mention
- Describe when you first noticed probiotics for babies and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if you want to start a probiotic and need guidance on which strain and product to choose.
- Mention if your baby has persistent digestive issues that are not improving with standard care.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- You want to start a probiotic and need guidance on which strain and product to choose
- Your baby has persistent digestive issues that are not improving with standard care
- Your baby has any immune system concerns or was born prematurely - probiotics should only be used under medical guidance
Urgent signs to report immediately
- Your baby has a severe allergic reaction after taking a probiotic - swelling, difficulty breathing, or widespread rash
- Your immunocompromised baby develops fever or worsening symptoms after starting probiotics
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of probiotics for babies are normal. Talk to your pediatrician if your baby has a severe allergic reaction after taking a probiotic - swelling, difficulty breathing, or widespread rash.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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