--- topic: "Infant Formula" title: "Choosing an Infant Formula" order: 1 description: "How to choose a regulated infant formula, what added ingredients really do, how to prepare it safely, and why homemade or raw-milk formulas are not an option." question: "How do you choose a safe infant formula, and are homemade formulas okay?" answer: "A regulated, iron-fortified formula is likely a safe choice for most babies; homemade formulas and raw milk are not safe substitutes." actions: - "Choose a regulated, iron-fortified formula of the type your pediatrician suggests; most babies do fine on any brand of the same type, including store brands [1]." - "Prepare it exactly as labeled: measure the water first, never dilute or concentrate it, use it within 2 hours (24 if refrigerated), discard leftovers and never microwave bottles [2]." - "If your baby is two months old or younger, was born early or has a weakened immune system, ask your pediatrician about sterile liquid formula instead of powder [2]." cautions: - "Never feed a baby homemade formula or raw (unpasteurized) milk: they can lack vital nutrients or carry dangerous bacteria, and babies have been hospitalized [1][3][4]." - "Do not give cow's milk or toddler drinks in place of formula before 12 months; infants given cow's milk had nearly four times the risk of iron-deficiency anemia [1][5]." - "Call your pediatrician if your baby vomits repeatedly, has diarrhea, blood or mucus in the stool, loses weight or seems unwell after a formula change [1]." confidence: 3 confidenceNote: "Regulation, preparation rules and the dangers of homemade formula are well documented, but claims for added ingredients rest on single trials or observational data." evidenceSummary: rctCount: 1 observationalCount: 3 metaAnalysisCount: 3 totalParticipants: "18,000+" replicated: false newestStudyYear: 2026 references: - id: "1" url: "https://www.fda.gov/food/infant-formula-homepage/infant-formula-information-parents-caregivers" title: "Infant Formula Information for Parents & Caregivers" authors: "U.S. Food and Drug Administration" year: 2026 journal: "FDA" - id: "2" url: "https://www.fda.gov/food/buy-store-serve-safe-food/handling-infant-formula-safely-what-you-need-know" title: "Handling Infant Formula Safely: What You Need to Know" authors: "U.S. Food and Drug Administration" year: 2024 journal: "FDA" - id: "3" pmid: "24344105" title: "Consumption of raw or unpasteurized milk and milk products by pregnant women and children" authors: "Committee on Infectious Diseases, Committee on Nutrition" year: 2014 journal: "Pediatrics" - id: "4" pmid: "34411077" title: "Notes from the Field: Vitamin D-Deficient Rickets and Severe Hypocalcemia in Infants Fed Homemade Alkaline Diet Formula - Three States, August 2020-February 2021" authors: "Calello DP, Jefri M, Yu M, et al." year: 2021 journal: "MMWR Morb Mortal Wkly Rep" - id: "5" pmid: "25989719" title: "Health effects of cow's milk consumption in infants up to 3 years of age: a systematic review and meta-analysis" authors: "Griebler U, Bruckmüller MU, Kien C, et al." year: 2016 journal: "Public Health Nutr" - id: "6" url: "https://www.fda.gov/food/infant-formula-homepage/fdas-infant-formula-product-testing-results" title: "FDA's Infant Formula Product Testing Results" authors: "U.S. Food and Drug Administration" year: 2026 journal: "FDA" - id: "7" pmid: "32310746" title: "Food Safety and Invasive Cronobacter Infections during Early Infancy, 1961-2018" authors: "Strysko J, Cope JR, Martin H, et al." year: 2020 journal: "Emerg Infect Dis" - id: "8" pmid: "28107288" title: "Effects of Infant Formula With Human Milk Oligosaccharides on Growth and Morbidity: A Randomized Multicenter Trial" authors: "Puccio G, Alliet P, Cajozzo C, et al." year: 2017 journal: "J Pediatr Gastroenterol Nutr" - id: "9" pmid: "22161363" title: "Long-chain polyunsaturated fatty acid supplementation in infants born at term" authors: "Simmer K, Patole SK, Rao SC" year: 2011 journal: "Cochrane Database Syst Rev" - id: "10" pmid: "35998087" title: "Lactose-reduced infant formula with corn syrup solids and obesity risk among participants in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC)" authors: "Anderson CE, Whaley SE, Goran MI" year: 2022 journal: "Am J Clin Nutr" - id: "11" pmid: "37432055" title: "The Effect of Goat-Milk-Based Infant Formulas on Growth and Safety Parameters: A Systematic Review and Meta-Analysis" authors: "Jankiewicz M, van Lee L, Biesheuvel M, et al." year: 2023 journal: "Nutrients" - id: "12" pmid: "38596433" title: "Gastrointestinal tolerability of organic infant formula compared to traditional infant formula: A systematic review" authors: "Al-Beltagi M, Saeed NK, Bediwy AS, et al." year: 2024 journal: "World J Clin Pediatr" --- For most healthy babies, a regulated, iron-fortified infant formula is a safe, nutritionally complete food, and most do fine on any brand of the same type [1][2]. FDA testing found most samples had undetectable or very low contaminant levels [6]. What matters most is preparing it exactly as labelled [2]. Homemade formula and raw milk are not safe alternatives [1][3]. Powdered formula is not sterile, so newborns may need liquid formula [2]. ## How it works **What "regulated" means.** In the US, the FDA requires minimum amounts of 30 nutrients in routine infant formula and maximums for 10 that can harm in excess, such as vitamins A and D. Makers must register, notify the FDA before changing a formula, and test every batch for Cronobacter [2]. Specialized formulas for medical conditions are exempt from some of these rules, so use them only on a clinician's advice [2]. Outside the US, check that a product meets your national standard. **Types.** Routine formulas can be cow's-milk, goat's-milk or soy based. Partially hydrolyzed, thickened "spit-up" and lactose-free versions exist for common digestive complaints, while extensively hydrolyzed, amino-acid, premature and metabolic formulas are for medical needs. The American Academy of Pediatrics recommends formula with iron to prevent iron-deficiency anemia [1]. Ask your pediatrician before switching types. **What the extras do.** - *Human milk oligosaccharides (HMOs).* One trial of 175 infants found HMO formula supported normal growth and fewer parent-reported chest infections, which still needs confirming [8]. - *DHA and ARA oils.* Trials have not shown consistent developmental benefits for term babies [9]. - *Carbohydrates.* Lactose is the main sugar in human milk [1]. Formula with corn syrup solids was linked to modestly higher obesity risk in one large observational study [10]. - *Goat milk.* Four industry-funded trials found growth and safety similar to cow's-milk formula [11]. - *Organic.* Direct comparisons are scarce, so health advantages remain unproven [12]. - *Contaminants.* Most of 312 samples FDA tested had undetectable or very low levels of toxic elements, pesticides, PFAS and phthalates [6]. **Preparing it safely.** Cronobacter, a rare but serious cause of infant meningitis and sepsis, can get into powdered formula after the container is opened. Babies two months or younger, born prematurely or with weakened immunity are most at risk, and sterile liquid formula is safer for them [2][7]. Wash your hands, sanitize bottles, use safe water, and follow the label for mixing, storage and discarding leftovers [2]. **Homemade and raw-milk formulas.** The FDA and the American Academy of Pediatrics advise against both [1][3]. Three infants fed homemade "alkaline diet" formulas developed severe low calcium and rickets [4]. **Age limits.** Cow's milk is not a substitute for formula in the first year, and "toddler" drinks are not for babies under 12 months [1][5]. ## The evidence in detail ### Regulation and contaminant testing FDA's 2023 to 2025 market-basket survey tested 312 samples from 16 brands (278 powdered, 11 concentrated liquid, 23 ready-to-feed; 258 cow's-milk, 44 soy, 10 amino-acid based). Mercury was undetected in 95% of samples. Lead ranged up to 1.1 ppb, with 95% of samples under 0.5 ppb; cadmium reached 1.5 ppb; arsenic, undetected in only 6%, reached 4.7 ppb (95% under 2.0 ppb) and was inorganic in the subset speciated. Of 318 pesticides tested, 99% of samples had none detectable and glyphosate was never found; 25 of 30 PFAS were never found; phthalates were undetected in 54%. FDA says detection does not make a product unsafe and calls US formula safe, while noting that snapshots miss lot-to-lot variation and some samples triggered follow-up [6]. ### HMOs, oils and sugars Puccio randomized 175 healthy newborns to a cow's-milk formula with or without 2'-fucosyllactose (1.0 g/L) and lacto-N-neotetraose (0.5 g/L) for six months. Weight gain was non-inferior (difference -0.30 g/day, 95% CI -1.94 to 1.34). Parent-reported bronchitis was lower through 12 months (10.2% versus 27.6%) and antibiotic use lower (42.0% versus 60.9%), but these were secondary outcomes, and the authors called for confirmation [8]. Simmer's Cochrane review of 15 trials (1,889 term infants) found most showed no neurodevelopmental benefit from added DHA and ARA, visual acuity benefits in four of nine trials, and possibly marginally lower weight at one year. It could not recommend routine supplementation [9]. Anderson analyzed 15,246 WIC children given cow's-milk formula. Those issued corn-syrup-solids formula had 10% higher obesity risk at age 2 (RR 1.10, 95% CI 1.02-1.20), 16% higher after 12 months of exposure (RR 1.16, 95% CI 1.05-1.28), and 7% higher at age 4. The data are administrative and observational; formula choice may track a baby's digestive symptoms or family circumstances [10]. ### Goat milk and organic Jankiewicz pooled four randomized trials (670 infants; all industry-funded, each with some risk-of-bias concern). Goat-milk formula matched cow's-milk formula for weight (z-score difference 0.21, 95% CI -0.16 to 0.58), length and head circumference, with similar stool frequency and adverse events [11]. For organic formula, Al-Beltagi found comparative studies scarce and formula differences a major limit; suggested advantages in lipid profile, methionine content and antibiotic-resistant bacteria are potential, not demonstrated health gains [12]. ### Cronobacter Strysko reviewed 183 invasive infant infections (1961 to 2018). Two-thirds were in neonates, 38% (42 of 112) died, and 79% (81 of 102) had recently consumed powdered formula. Cases rose after 2004 (about 8.7 a year worldwide), and among US cases 56% were full-term and 78% non-hospitalized. Contaminated formula, most often from an opened container, was found in 30% (21 of 71) of investigations [7]. These infections are rare but severe, which is why preparation rules and sterile liquid formula for the highest-risk babies matter. ### Homemade and raw-milk formulas The AAP statement notes that raw milk from cows, goats and sheep carries Listeria, Campylobacter, Salmonella, Brucella and E. coli O157; that the claimed benefits of raw milk have not been shown in evidence-based studies; and that pasteurized milk gives equivalent benefits without the infection risk [3]. Calello's MMWR report describes three infants aged 4, 5 and 9 months fed homemade "alkaline diet" formulas of sea moss, hemp seeds, coconut water or milk and dates. Two had calcium of 4.0 and 4.5 mg/dL (normal 8.8 to 10.8), all had rickets, one had a cardiac arrest with hypoxic brain injury, and one had severe iodine deficiency [4]. Case reports cannot show frequency, but the missing nutrients are ones infants cannot do without, and FDA reports hospitalizations from homemade formula [1]. ### Cow's milk before 12 months Griebler's meta-analysis of 23 studies found infants given cow's milk had 3.76 times the risk of iron-deficiency anemia compared with follow-on formula (95% CI 2.73-5.19; four studies) [5]. ### Where the evidence is thin Every ingredient claim rests on one trial, a mixed Cochrane review, observational data or industry-funded studies. Nobody can ethically randomize babies to homemade formula, so that advice rests on regulation, case reports and biology. ### Bottom line (confidence 3 of 5) Regulated formula is safe, preparation rules are well founded, and homemade or raw-milk formula is dangerous. Differences between regulated brands are small and poorly proven, so choose a type with your pediatrician and prepare it exactly as labelled.