15% off every subscription delivery  ·  Free Welcome Kit in your first box  ·  Free shipping for first-time subscribers 15% off every delivery + free Welcome Kit 15% off every delivery + free kit

4.8 from 2,316 reviews

Save 15% on every delivery. Plus a free Welcome Kit.

A Family Size tub of Daily Growing Up Prebiotics next to an open box of seven travel sachets

Free Welcome KitA $19.98 value, in your first box

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$59.50 instead of $70.00, every delivery

Tasteless, textureless prebiotic fiber that helps kids’ poop slip out better.

“My child is a super sleuth at detecting if I add something to his food or drink, but they don’t notice these! Works well too.”
Katelyn N., verified buyer
4.8★ from 2,316 reviewsRecommended by pediatriciansFree shipping for first-time subscribers100k+ families servedTasteless & textureless3g prebiotic fiber per serving

15% off every box. A free gift in the first.

The savings keep going. The Welcome Kit comes once.

Daily Growing Up® Prebiotics, Family Size / Unflavored
A Family Size tub beside an open box of seven travel sachets
Poop Tracker Gamecards and Stickers
A child adding a sticker to a Poop Tracker gamecard
What to expect after six weeks of daily prebiotics
3g of prebiotic fiber Made with HMOs Packaged in the USA 0g added sugar

2,316 Reviews

Daily Growing Up® Prebiotics

Prebiotic fiber supplement for kids.

Tasteless and textureless, perfect for picky eaters, and helps kids’ poop ‘slip out better’. Gentle enough for every day, from age 1.

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Subscribe & Save 15%

$59.50$70.00every 4 weeks

Save $10.50$1.06/serving
  1. Today$59.50+ free Welcome Kit
  2. Every 4 weeks after$59.50still 15% off

Free with your first subscription order

  • Poop Tracker Gamecards and StickersSticker pack$9.99 FREE
  • A box of seven Growing Up Prebiotics travel sachets7 travel sachets$9.99 FREE
  • PDFConstipation guideFREE

Welcome Kit value $19.98 FREE, ships once in your first box

  • 15% off every delivery
  • Free shipping for first‑time subscribers
  • Skip or cancel anytime

45 days of consistent use for best results

Your free Welcome Kit

A $19.98 value, free in your first box.

A child placing a sticker on a Begin Health Poop Tracker gamecard

Poop Tracker Gamecards and Stickers

Adventure sticker sets your kiddo decorates as they build healthy poop habits. Every sticker is a little win.

Value $9.99FREE

An open box of seven Growing Up Prebiotics travel sachets

7-count travel sachets

Seven single servings for the diaper bag, the lunchbox or grandma’s house, so the routine never takes a day off.

Value $9.99FREE

Constipation guide (PDF)

Our guide for families working through constipation, with practical help you can use from day one.

Digital downloadFREE

Total value $19.98, yours free with your first box

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How Subscribe & Save works

Savings on every box. The kit, once.

  • Box 1 · Today$59.50+ free Welcome Kit
  • Box 2 · Week 4$59.5015% off
  • Box 3 · Week 8$59.5015% off
  • Box 4 · Week 12$59.5015% off

Then every 4 weeks at the same price, until you cancel. Skip a delivery or cancel anytime in your Begin Health account.

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Why Parents Love Us

  • Tasteless & textureless
  • Safe for long-term use
  • 3 grams of fiber (per serving)
  • Allergen-friendly
  • Ages 1 year +
  • Convenient, powder formula

2 Simple Ingredients to Help Balance Your Kiddo’s Gut

Rooted in Science, Inspired by Nature

A mother giving her toddler a drink

2’-FL HMOs(Human Milk Oligosaccharides)

Special sugars in mom’s breast milk that fuel the growth of beneficial gut bacteria.

  • Supports the gut’s natural balance
  • Helps your kiddo build a healthier gut microbiome

Ingredient sourced from Germany

Chicory root and its blue flowers

Chicory Root Fiber(Inulin)

A gentle plant-based fiber sourced from the chicory root to support softer stooling.

  • Delivers 3g of high-quality prebiotic fiber
  • Helps soothe digestive discomfort

Ingredient sourced from Belgium

Growing Up Prebiotics vs Laxatives

BenefitsGrowing Up PrebioticsTraditional Laxatives
Gentle ReliefSupports natural, comfortable digestionOften leads to abrupt and harsh bowel movements
Gut HealthNurtures gut microbiome for overall well-beingShort-term relief only
Long-Term BenefitsPromotes healthy digestion patternsAddresses symptoms, not the root cause
Kid-FriendlySpecifically designed for kids and toddlersGenerally not tailored for kids
No Dependency RiskEncourages natural, regular bowel movementsMay create reliance on external aid

Ready to ditch the laxatives?

Choose an option that works with your kiddo’s body, not against it.

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How To Get Started

Help your kiddo “go” with confidence in 3 simple steps!

Measure a sachet, stir it into a bowl, serve it to your kiddo
  1. 1. Measure & Mix

    Add one serving into at least 4 to 6 oz of your kiddo’s favorite food or drink.

  2. 2. Dissolve

    Stir until the powder completely disappears.

  3. 3. Serve & Smile

    Serve daily and cheer as your little one enjoys smoother digestion and happier poops ahead.

Pro Tips

  • Start Slow! Begin with ½ a serving for the first few days and gradually work up to a full serving.
  • How much? Ages 1 to 3: one serving a day. Ages 4 and up: up to two, given separately.
  • Trouble Mixing? Dissolve in a small amount of warm water first, then add to the rest of the food or drink.
A child stirring a drink

Consistency is Key!

Daily use for at least 6 weeks helps build gut health and support regularity. Stick with it and see the difference!

Pediatrician and Parent Approved

  • A smiling girl holding a Growing Up Prebiotics sachet

    It’s life changing

    Our daughter’s journey from severe constipation to daily comfort has been nothing short of miraculous.

    - Molly H

  • A toddler drinking from a blue cup

    Finally relief

    After a year of withholding, our 3-year-old now goes regularly. This product changed our family’s life.

    - Veanna E

  • A toddler holding a Growing Up Prebiotics tub

    Poop problem gone

    Helped my picky eater so with her constipation so I no longer have to give her Miralax. We are so thankful for this prebiotic.

    - Mary G

  • A smiling boy in a kitchen

    Withholding now to a minimum

    It started working 2 days in, and now we’ve gone from withholding for 5-6 and sometimes 7 days, down to going every 2 days now!

    - Katie Van H

“Begin Health has been a game-changer for the kids in my practice. They’re a gentle, effective way to ease constipation without relying on laxatives.”
Dr. Wendy Hunter, MD, pediatrician and host of The Pediatrician Next Door podcast

2,316 Reviews

Loved By Parents Just Like You

Amazing

“She was only pooping once every 7-10 days and was hardly eating. She was absolutely miserable! This has been the only thing that has worked for her.”
Brooke E. Verified Buyer

Begin Health Prebiotics

“My son is a picky eater so the unflavored powder makes it great to mix into his water bottle and he cant even tell!”
Flora T. Verified Buyer

Actually helps!

“Noticed a difference in 6YO’s BMs almost immediately. And unlike other fiber powders, this one dissolves super quickly and my daughter can’t taste it. Worth it!”
Danielle S. Verified Buyer

Works great!

“Took a week or two to see regular benefits but she has been much more comfortable since we started, and now we do not go a day without it.”
Anna B. Verified Buyer

Questions parents ask

Still wondering? We’ve got you.

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What’s in the Welcome Kit, and do I get it every time?
Poop Tracker Gamecards and Stickers, a 7-count pack of travel sachets and our constipation guide (PDF), a $19.98 value. It comes once, with your first subscription order. The 15% off is on every delivery, the first one and every one after it.
How much is each delivery, and how often does it come?
Your prebiotics arrive every 4 weeks at the subscription price you see above, 15% off the regular price. For a Family Size tub that is $59.50 instead of $70.00, every time.
Can I skip or cancel?
Yes. Skip a delivery or cancel anytime from your Begin Health account.
How do I give it to my kid?
Mix one serving into at least 4 to 6 oz of milk, water or a preferred drink, or stir it into yogurt or other soft foods. Trouble mixing? Dissolve it in a little warm water first, then add the rest.
How much should my kid take?
Ages 1 to 3: one serving a day. Ages 4 and up: up to two servings a day, given separately. Some kids have a little gas or bloating at first, so start with half a serving and build up over a few days.
When will we see results?
Some families notice changes within days, but science supports at least 45 days of daily use for best results. A subscription keeps the routine going without a reorder.
Is it safe for everyday use?
Yes. It is gentle on the gut and pediatrician-recommended for ages 1+. If your kiddo takes any medication or has a medical condition, check with their health care professional first.
Which size should I choose?
The 28-Pack covers four weeks of one serving a day. Family Size (56 servings) covers two kids on one serving a day, or one kid on two. Whole Family (112 servings) is for bigger households. Flavors come in Family Size; the other sizes are Unflavored.
What’s in it?
2’-FL HMOs and chicory root fiber, with 3g of prebiotic fiber per serving. May contain traces of milk. Free from soy, eggs, tree nuts, peanuts, wheat, gluten, shellfish and fish.

Happy tummies, happy kiddos.

Subscribe and save 15% on every shipment, not just the first. Your first box also comes with a free Welcome Kit: stickers, seven travel sachets for days on the go and our constipation guide, a $19.98 value.

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$59.50 every 4 weeks · skip or cancel anytime