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The formula aisle is confusing on purpose. Every tub says “gentle,” “complete,” and “inspired by breast milk,” and none of those words tell you what actually matters: what is inside the can, what is left out, and whether your baby’s tummy will accept it. That last part is the one you cannot read off a label. So this guide sorts six genuinely organic, all-natural infant formulas by what they are actually made of — the proteins, the carbohydrates, the certifications, and the things parents keep noticing after the first week of bottles.
I’m Min — the founder and writer behind Gadgets Feed. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
You will see which cans skip corn syrup and palm oil entirely, which use A2 milk protein, and which one parents say their babies accept straight off breast milk. By the end you will know exactly which can to put in your cart, and the complete picture of the best all natural baby formula options worth your money.
Our Picks at a Glance
How To Choose The Best All Natural Baby Formula
You cannot return a can your baby refused, and you cannot taste it yourself, so picking formula feels heavier than picking any other product. The good news: you can check four things on the label in under a minute. Here is what actually separates one organic can from another.
Start with the protein, not the front of the tub
Most milk-based formulas use a mix of A1 and A2 beta-casein proteins. A2 is the type found naturally in breast milk, and some babies who seem fussy or gassy on a standard milk formula do better when the protein source is A2. Baby’s Only builds its whole recipe around A2 organic milk for exactly this reason, and it is the only pick here that names A2 as its defining feature. If your baby has already shown sensitivity to a standard milk formula, read the protein line first.
Check what was left out of the can
The cleanest formulas are defined by their omissions. Corn syrup solids, palm olein oil, artificial growth hormones, and non-GMO status are the four things to scan for. Similac Organic and Similac Irish Farms both list corn syrup and palm olein oil as excluded, and Bobbie goes further by using 100% lactose as the carbohydrate because corn syrup, maltodextrin, and sucrose are not in human milk. Ingredients left out are just as telling as the ones printed.
Know your certifications and stages
Organic claims range from meaningless to rigorously audited. Look for USDA Organic at minimum; EU Organic and Clean Label Project certification indicate a second layer of independent review. Happy Baby holds all three across both of its picks. Stage also matters: Stage 1 covers 0-12 months, while Stage 2 is built for 6-12 months with higher levels of calcium, iron, phosphorus, iodine and selenium to support an older baby’s development.
Match the prebiotics and probiotics to your baby’s digestion
Prebiotics feed the good bacteria already in your baby’s gut; probiotics add live cultures directly. Happy Baby includes a patented probiotic and prebiotic blend, and that blend is the single most consistent thing parents describe when they talk about the formula. If constipation or gas has been your problem, that combination is worth prioritizing over brand name alone.
Quick Comparison
| Model | Best For | Stage | Protein Base | Certifications | Amazon |
|---|---|---|---|---|---|
| HAPPY BABY Stage 2★ Best Overall | Breastfed babies transitioning at 6 months | 6-12 Months | Milk-based with probiotic blend | USDA & EU Organic, Clean Label | Amazon |
| Similac OrganicBest Value | Budget-friendly organic complete nutrition | 0-12 Months | Milk-based, non-GMO | USDA-Certified Organic | Amazon |
| Similac Irish Farms | Parents who want European-sourced milk | 0-12 Months | Fresh Irish milk, non-GMO | Made in Europe | Amazon |
| Baby’s Only A2 Organic | Sensitive tummies and value-seeking parents | Newborn-12 Months | A2 beta-casein protein | Organic, made in Ohio | Amazon |
| Bobbie Organic Gentle | Fussiness, crying and combo feeding | Newborn-12 Months | Smaller milk proteins, 100% lactose | USDA & EU Organic, Clean Label | Amazon |
| HAPPY BABY Stage 1 | Constipation and stubborn tummy issues | 0-12 Months | Milk-based with probiotic blend | USDA & EU Organic, Clean Label | Amazon |
In-Depth Reviews
1. HAPPY BABY Stage 2, 6-12 Months, Organic Infant Formula, 22.9oz (1 Pack)
Our pick — over 4.5★ from 200+ verified ratings; the strongest balance of quality and price.
The Stage 2 pick parents say breastfed babies take without a fight.
What wins people over here is the transition. Over and over, the pattern in the reviews is the same: a breastfed baby who refused every other can takes this one without a fuss. Parents trying Similac and Bobbie first describe Happy Baby as the one that finally worked. The 1 oz water to 1 scoop ratio (one scoop of powder per ounce of water) is one reason why — it lets you mix a single ounce for a partial feed instead of committing to a full bottle and pouring the rest down the sink.
The patented probiotic and prebiotic blend is the other half of the story, and it is the aspect buyers single out most. This is the only USDA organic formula in this lineup that pairs probiotics and prebiotics, and the prebiotic levels are designed to sit close to what is found in breast milk among organic brands. Parents switching from other brands point to more regular bowel movements as the proof it works. The formula also delivers DHA at levels found in breast milk, and it is USDA and EU certified organic, made in Europe, and Clean Label Project Certified.
Here is where it sits against the rest of the list. At 1.43 pounds of powder per tub it is lighter than the Similac Irish Farms can, which holds 1.92 pounds, so you are refilling more often. That is the honest trade-off. The other catch is purely logistical: an occasional tub arrives with a loose scooper or a broken outer seal, which is a shipping problem rather than a formula problem, but worth knowing before you open the box.
What Parents Keep Saying
- Babies who rejected other brands accept this one — the most repeated story in the reviews.
- Probiotic and prebiotic blend designed to support gut bacteria closer to breastfed infants.
- DHA at levels found in breast milk, meeting European DHA requirements.
- Mixes easily with no clumping at a flexible 1 oz water to 1 scoop ratio.
The Fine Print
- At 1.43 pounds, the tub is lighter than the 1.92-pound Similac Irish Farms can, so it runs out sooner.
- A small number of tubs arrive with a loose scooper or a broken outer seal — a shipping issue, not a formula one.
Best fit for: anyone weaning a breastfed baby at the six-month mark who wants the gentlest possible handoff and a probiotic blend doing real work in the background.
Think twice if: you want the largest powder volume per tub, since the Similac Irish Farms can holds more.
2. Similac Organic Infant Formula, Easy to Digest, USDA-Certified Organic, Powder, 20.6-oz Tub
The USDA-certified organic tub that leaves out corn syrup, palm olein oil, and growth hormones.
Similac Organic is built around subtraction as much as addition. It is made without artificial growth hormones, palm olein oil, and corn syrup, and it is non-GMO — four of the most common filler ingredients in standard formula, deliberately left out. It holds USDA-Certified Organic status and provides complete nutrition for the first year, with a blend of DHA, lutein, and vitamin E that also appears in breast milk.
The 20.6-ounce tub is the size cue here. That is a bit less powder than the 24.7-ounce Similac Irish Farms can, though it still comes in a 1.57-pound package. Parents who have made the switch from the standard Similac 360 describe the difference in bowel movements as the reason they stayed. The scoop storing neatly in the lid is a small design detail that keeps the handle clean and the scoop easy to find during a 3 a.m. bottle. For a formula that is available in ready-to-feed liquid too, this powder version is the practical everyday pick.
One thing worth knowing: the 4.8 rating on this can is the highest in the lineup, but the review base is also the smallest, so the score reflects a smaller pool of parents than the Similac Irish Farms or HAPPY BABY picks. If you want the widest consensus of owners, the next two picks have more voices behind them.
Where it shines: the ingredient exclusions — no artificial growth hormones, no palm olein oil, no corn syrup, non-GMO — make this a clean straight-ahead option with nothing weird in the can.
Smaller tub, fewer reviews: at 20.6 ounces it holds less than the 24.7-ounce Irish Farms can, and the review pool is smaller than the Happy Baby picks.
Grab this one if: you want organic complete nutrition without paying premium-tier prices and you have no specific sensitivity to work around.
Choose differently if: you need the largest can available or you specifically want a probiotic blend.
3. Similac Irish Farms, Easy-to-Digest Baby Formula, Infant Formula, 0-12 Months, 24.7-oz Can
The 24.7-ounce can of fresh Irish milk — the largest powder volume in this lineup.
This is the 24.7-ounce can — 20% more formula than the 20.6-ounce Similac Organic tub sitting one spot above it. That extra volume is the practical case for it: fewer reorders, longer between trips to the store. The recipe starts with fresh milk from cows in Ireland, and it is made without artificial growth hormones, palm olein oil, or corn syrup, and is non-GMO.
Where parents notice the difference is consistency. The most repeated description in the reviews is simple — babies who spit up on other formulas do not spit up on this one, and parents who tried to switch to a “same thing, different label” option describe coming straight back. There is also a nutrition story in the review pages: parents describing healthy weight gain and steady growth rather than excessive gain, which they credit to milk being the first ingredient rather than corn sugar. The formula is designed to support brain and eye development with DHA (an omega-3 fat found in breast milk), lutein (a nutrient that supports eye health), and vitamin E, and it is batch-tested at the manufacturing site.
One practical note: the can is the tallest on this list at 5.35 inches, so measure your cabinet shelf before you commit to buying multiple. And as with any Similac can, if you are switching from a formula your baby has done well on, make the swap gradually rather than over a single day.
Why parents of spitters buy it: the most consistent thing described across the review pages is that this is the formula their baby does not projectile spit up on, and parents who tested “equivalent” alternatives report going back to this one.
What to plan around: the can is tall for a shelf, and switching formulas abruptly is a common cause of the exact digestive upset parents are trying to solve.
The right pick when: you want the largest can on this list and the fresh-Irish-milk sourcing story matters to you.
Less ideal when: your cabinet shelf is tight, since this can runs tall at 5.35 inches.
4. Baby’s Only A2 Organic Milk Infant Formula, 21 oz, 1 Pack
The only can here built on A2 beta-casein protein, for a baby still gassy on standard milk formula.
Baby’s Only is the only formula here that names A2 as its engine. A2 is a beta-casein protein found naturally in mammal milks, including breast milk, and this formula sources milk only from cows that predominantly produce A2 beta-casein proteins. If your baby has been gassy on a standard milk-based formula, that protein difference is the first thing worth trying, and this is the only can on this list built around it. It is also the highest-volume formula in the lineup at 21 ounces, and it skips corn syrup, palm oil, GMOs, artificial colors, sweeteners, and growth hormones.
What buyers love most is the formula’s overall package — organic, clean ingredients, made in small batches in a facility in Ohio, and easier on the wallet than most organic options. Digestibility is the aspect with the most mixed feedback: plenty of parents report no gas and no digestive trouble at all, while others find it causes constipation. That split is worth reading as a fit issue rather than a product flaw — every baby’s gut responds differently, and one formula that works for a newborn may not work for a six-month-old.
The one quirk worth knowing is that the powder foams badly no matter how gently you shake or swirl it. A parent switching over from another brand found that the foam was enough to knock it down a star, even while the baby loved the taste. Let the bottle settle for a minute before feeding and the problem is manageable.
The Case For It
- A2 beta-casein protein sourced from cows that predominantly produce it — the only formula on this list built around A2.
- 21 ounces of powder, the largest volume in this lineup.
- Free of corn syrup, palm oil, GMOs, artificial colors, sweeteners and growth hormones.
- Made in small batches in Ohio.
What to Know First
- Digestibility is the most mixed topic in the reviews — some parents report no digestive issues, others find it constipating.
- The powder foams more than other formulas and can be fussy to shake into a smooth bottle.
Worth trying if: your baby has been gassy or unsettled on a standard milk formula and you want to test a different protein rather than a different brand.
Skip if you need certainty: the mixed digestive feedback means this one is a bit of a trial run — have a back-up can ready if it does not land.
5. Bobbie Organic Gentle Baby Formula, 14.1 oz, 1 Pack
Smaller milk proteins plus 100% lactose, for the gassy, fussy, crying baby.
Bobbie Gentle is formulated with smaller milk proteins to support digestion, and the carbohydrate source is 100% lactose — the same primary carbohydrate found in breast milk. Corn syrup, maltodextrin, and sucrose are left out because they are not in human milk either. Each batch goes through 2,000+ quality checks before it ships, and the formula holds USDA and EU Organic certification along with Clean Label Project certification. It is the pick for the specific parent dealing with a fussy, gassy, crying baby and looking for a protein structure that behaves more like breast milk.
What parents describe most is the digestive calm. Gassy babies tolerate it well, spit-up drops off, and bowels become more regular. Parents combo-feeding — one formula bottle a day with the rest breast milk — describe it as the only formula that worked after others caused vomiting, and several credit it with helping their baby hit weight gain goals. Where the formula has a split reputation is consistency, value, and smell: some parents find the odor fine, others find it unpleasant, and the 14.1-ounce tub is the smallest on this list, which is the honest reason the value comments come up.
The one label confusion worth flagging: the ingredients and nutrition in Gentle are identical to the regular Bobbie formula — only the name and packaging differ. So if you have already used regular Bobbie successfully, there is no nutritional reason to switch.
What the fussy-baby parents report: smaller milk proteins and 100% lactose is the combination they credit for reduced spit-up, more regular bowels, and better tolerance than formulas that caused vomiting.
The size and smell caveat: at 14.1 ounces this is the smallest tub on the list, and the odor is a love-it-or-hate-it detail that crops up in the reviews.
Reach for this if: you are combo-feeding, or you have a gassy, fussy baby and want smaller proteins plus 100% lactose as your next move.
Look elsewhere if: you want the largest can for the money — the 14.1-ounce tub is the smallest here.
6. HAPPY BABY Stage 1, 0-12 Months, Organic Infant Formula, 22.9oz (1 Pack)
The Stage 1 can parents credit with resolving constipation other brands could not.
If you already read the Stage 2 Happy Baby pick above, you know the recipe. This is the Stage 1 version — 0 to 12 months instead of 6 to 12 — with the same probiotic and prebiotic blend (probiotics are live good bacteria; prebiotics are fibers that feed them), the same DHA at levels found in breast milk, and the same USDA and EU organic certification plus Clean Label Project certification. The difference is the nutrient profile: Stage 1 is built for younger babies, so the calcium, iron, phosphorus, iodine, and selenium levels match what a 0-12 month old needs.
Where this can earns its own slot is in the parents who describe constipation as the problem it solved. Time and again the story is a baby who was only going every few days, screaming, and producing rock-hard stool — and then this formula resolved it and moved them to daily, normal bowel movements without the crying. Parents switching from other brands describe the same shift in stool color and consistency. Stomach sensitivity is the second-most-discussed positive in the reviews, right behind the formula itself, and it is the reason this pick has its own label here rather than being folded into Stage 2.
The trade-off to be honest about is packaging. Happy Baby changed the container design, and some parents have found the newer versions flimsier, with safety tabs that arrive damaged and scoops occasionally missing. The formula itself is not the issue — parents who have used it since their first child still describe growing healthy babies on it — but the container is worth a quick check when it arrives.
Why It Earns Its Slot
- Probiotic and prebiotic blend is the most-discussed positive here, second only to the formula itself.
- Numerous parents describe it resolving severe constipation that other brands could not.
- USDA and EU certified organic and Clean Label Project Certified.
- DHA at levels found in breast milk, meeting European DHA requirements.
Honest Notes
- The new container design has drawn complaints about flimsy safety tabs and an occasional missing scoop.
- Made for 0-12 months; older babies at the 6-month mark should move to the Stage 2 version.
Buy this if: your baby is under six months and constipation has been the recurring problem you keep trying to solve.
Switch to Stage 2 if: your baby has passed the six-month mark and needs the higher mineral levels that version provides.
Understanding the Specs
Stage 1 vs. Stage 2
Stages match formula nutrition to your baby’s age. Stage 1 covers 0 to 12 months. Stage 2 is built for 6 to 12 months and raises the calcium, iron, phosphorus, iodine, and selenium levels to support an older baby’s growth. Happy Baby is the only brand here that names this tailoring as a feature, and both of its picks carry it. If your baby is past six months, moving to the Stage 2 pick is the more age-appropriate choice — the formula is designed to change as the baby does.
A2 Protein and 100% Lactose
Two protein and carbohydrate choices separate the gentlest formulas from the rest. A2 beta-casein is a protein found naturally in mammal milks, including breast milk, and Baby’s Only sources milk only from cows that predominantly produce it. Lactose is the primary carbohydrate in breast milk, and Bobbie uses 100% lactose, leaving out corn syrup, maltodextrin, and sucrose because they are not in human milk. If a standard milk formula has not settled your baby’s tummy, one of these two features is the next thing to test.
Certifications to Look For
USDA Organic is the baseline. EU Organic and Clean Label Project certification add a second layer of independent review, and Happy Baby and Bobbie both carry all three. Similac Organic holds USDA certification, and Similac Irish Farms is made in Europe from fresh Irish milk. These certifications are what separate a real all-natural formula from one that just prints breezy words on the front of the tub.
The Ingredients Left Out
The omissions tell you as much as the ingredients list. Corn syrup solids, palm olein oil, artificial growth hormones, and non-GMO status are the four things to scan. Similac Organic and Similac Irish Farms both leave out corn syrup and palm olein oil. Bobbie leaves out corn syrup, maltodextrin, and sucrose. Baby’s Only leaves out corn syrup, palm oil, GMOs, artificial colors, sweeteners, and growth hormones. Fewer of these ingredients means a more confidence-inspiring can.
FAQ
What does “all natural” actually mean on a baby formula label?
Is all-natural baby formula actually safer than regular formula?
My baby is gassy on a standard milk formula — which pick should I try first?
What is the difference between Stage 1 and Stage 2 formula?
Can I mix an all-natural formula with breast milk in the same bottle?
Is organic baby formula worth the extra cost over standard formula?
Why does baby formula foam when I shake the bottle?
How long does an opened can of baby formula stay good?
Are ready-to-feed liquid formulas better than powder?
Can I switch my baby from one formula brand to another without a problem?
Final Thoughts: The Verdict
For most parents, the best all natural baby formula pick is the HAPPY BABY Stage 2 because it pairs the widest-appreciated transition story — babies accept it straight off breast milk — with the only probiotic and prebiotic blend in this lineup, plus USDA, EU, and Clean Label certification. It is the safest first can to try if your baby is breastfed and you are making the switch. If you want a European-sourced option and the largest can on the shelf, the Similac Irish Farms is the one to reach for, since 24.7 ounces holds 20% more than the Similac Organic tub. If constipation is the specific problem, the HAPPY BABY Stage 1 is your best shot at resolving it. And if the issue is a gassy, fussy baby on a standard milk protein, the Baby’s Only A2 is the only can here built around A2 — worth trying before you cycle through another brand. Whichever you pick, buy one can first and give it a full week before you judge it.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of September 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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