Kirkland vs. Name Brand Formula

Every infant formula sold in the United States — from the priciest European import to the Costco house brand — must comply with FDA regulations under 21 CFR 107. This isn't a suggestion. It's federal law.

The FDA sets minimum levels for 29 nutrients, including protein, fat, vitamins, and minerals. It also sets maximum levels for certain nutrients to prevent oversupplementation. Every manufacturer must register with the FDA, follow current good manufacturing practices (cGMP), test each batch before distribution, and notify the FDA at least 90 days before introducing a new formula to market.

This means Kirkland formula doesn't just happen to be similar to Similac. It is required by law to meet the same nutritional floor. The FDA doesn't have a separate, lower standard for store brands. There is one standard. Every formula meets it, or it doesn't get sold.

Here's something most parents don't realize: nearly every store-brand infant formula in the United States is made by the same company. Perrigo Nutritionals, headquartered in Vermont, is the largest manufacturer of store-brand infant formula in the country. They produce formula for Costco (Kirkland), Walmart (Parent's Choice), Target (Up&Up), Walgreens (Well Beginnings), Kroger (Comforts), and many other retailers.

The formula inside these cans comes from the same facilities, using the same manufacturing processes, and meeting the same FDA requirements. The primary difference between a can of Kirkland and a can of Parent's Choice is the label and the price, which varies by retailer.

This is not a secret. Perrigo publicly states that they are the leading manufacturer of store-brand infant formula. But the name-brand companies spend hundreds of millions on marketing each year to make sure you don't think too hard about this fact.

Formula is expensive regardless of which brand you choose. But the gap between store brand and name brand adds up fast. A baby who is exclusively formula-fed for the first year will go through roughly 50-60 cans of powdered formula. At a $15-20 difference per can, that is $750-1,200 in savings over the course of a year.

That's not a rounding error. That's a month or two of groceries for many families. Or a chunk of a childcare payment. Or a college fund contribution. The nutritional content is functionally equivalent, which means the savings come at no cost to your baby's health.

The infant formula industry is worth over $4 billion in the United States alone. Name-brand companies like Abbott (Similac) and Reckitt (Enfamil) spend hundreds of millions on advertising, hospital partnerships, and pediatrician marketing each year. That money doesn't go into the formula. It goes into making sure you associate their brand with safety, quality, and good parenting.

Here's what the marketing doesn't say:

The $15-20 price premium per can is almost entirely branding. The actual manufacturing cost difference between store-brand and name-brand formula is minimal. You're paying for the advertising budget, the hospital sample program, and the brand name on the can.

"Closer to breast milk" claims are carefully worded marketing, not clinical proof of superiority. Every formula company claims their product is "closest to breast milk." These claims are based on adding specific ingredients (like HMOs or MFGM) that exist in breast milk, but the FDA does not allow any formula to claim it is equivalent to breast milk. The addition of these ingredients has not been proven to produce meaningfully different health outcomes compared to formulas without them.

Hospital samples are marketing, not medical endorsement. When the hospital sends you home with Similac or Enfamil samples, that's not your doctor recommending that specific brand. It's the result of an exclusive contract between the formula company and the hospital. The formula companies pay for that placement.

None of this means name-brand formula is bad. It's perfectly good formula. It just isn't better formula — and the price tag doesn't reflect a quality difference. It reflects a marketing spend.

If you're considering switching your baby from a name-brand formula to Kirkland or another store brand, the process is straightforward. Because the nutritional profile is so similar, most babies handle the switch without any issues.

Some parents prefer a gradual approach — mixing 75% old formula with 25% new for a couple of days, then 50/50, then fully switching over 3-5 days. This is reasonable but not medically required for most babies. Many families switch cold turkey with no problems at all.

If you're tracking your baby's feeds with an app like tinylog, the transition is a good time to pay attention to intake patterns. Note how much your baby is eating, how they're tolerating the new formula, and whether their diaper output stays consistent. Most of the time, everything continues normally.

Store-brand formula covers the most common formulation — standard milk-based, iron-fortified infant formula. This works for the majority of babies. However, there are situations where a specialty formula is needed, and the store-brand options may be more limited:

If your baby has been diagnosed with cow's milk protein allergy (CMPA), you'll need an extensively hydrolyzed or amino acid-based formula. Store brands offer some sensitive and gentle options, but for true hypoallergenic formulas, your options may be limited to name brands like Similac Alimentum or Enfamil Nutramigen.

If your pediatrician has recommended a specific formula for a medical reason — such as a metabolic condition or severe reflux — stick with what was prescribed. In these cases, the specific formulation matters more than cost savings.

For babies on standard formula with no special dietary needs, store brand is nutritionally equivalent and significantly less expensive.

Most formula decisions don't require a doctor's input — but some do. Talk to your pediatrician if:

Your baby shows signs of formula intolerance after switching — persistent vomiting (not just spitting up), blood in stool, or a rash that doesn't resolve within a few days.

You're considering switching to a specialty formula (hypoallergenic, soy-based, or amino acid-based) — these are best used under medical guidance, not based on marketing claims.

Your baby isn't gaining weight appropriately — regardless of which formula you use, inadequate weight gain should be evaluated.

You're unsure which formula type is right for your baby's specific needs — your pediatrician can help match the formulation to your baby's situation without the influence of marketing.

For more on how to tell if your baby is eating enough regardless of formula brand, see our guide on adequate intake signs.

Kirkland formula and other store brands are not inferior versions of name-brand formula. They are nutritionally equivalent products that meet the same FDA requirements, are often made by the same manufacturer (Perrigo), and cost significantly less. The price difference between store brand and name brand is driven by marketing budgets, not ingredient quality.

If your baby is on standard formula and doing well, switching to a store brand is one of the simplest ways to save money without compromising nutrition. And if you're already using store brand, you can feel confident that your baby is getting exactly what they need.

For a broader look at how different formula types compare, see our guides on organic formula options and goat milk vs. cow milk formula.

• Cheapest Formulas — Options that meet every nutritional standard
• Best Baby Formulas 2026 — An evidence-based guide
• How to Read a Formula Label — Understanding ingredients that matter

• U.S. Food and Drug Administration — 21 CFR 107: Infant Formula Requirements
• U.S. Food and Drug Administration — "Infant Formula Guidance Documents & Regulatory Information"
• Perrigo Company — "Infant Nutrition" (corporate information on store-brand formula manufacturing)
• American Academy of Pediatrics — "Choosing an Infant Formula" (HealthyChildren.org)
• U.S. Government Accountability Office — "Infant Formula: Regulatory Framework and FDA Oversight" (GAO report)
• Consumer Reports — "Best Baby Formula" (comparison testing and analysis)

This guide is for informational purposes only and is not a substitute for professional medical advice. If you have concerns about your baby's formula or nutrition, please consult your pediatrician.