Similac vs Enfamil Formula (2026): Which Is Better?
Similac vs Enfamil formula compared side by side. Price, features, safety, ease of use, and real parent reviews. Our pick for 2026.
By TeachToddler Editorial Team · Updated April 11, 2026 · Baby Gear
🍼 The Two Giants of Infant Formula
Similac (made by Abbott) and Enfamil (made by Reckitt/Mead Johnson) together account for the majority of infant formula sold in the United States. Both are FDA-regulated, meet all federal nutritional requirements, and have been used safely by millions of babies. The differences between them come down to specific ingredient choices, proprietary blends, and how each brand approaches mimicking breast milk composition.
- Similac's flagship is Pro-Advance: features 2'-FL HMO (a prebiotic found in breast milk) and a no-palm-olein-oil fat blend
- Enfamil's flagship is NeuroPro: features MFGM (milk fat globule membrane) plus a higher DHA level than most competitors
- Both use nonfat cow's milk and whey protein concentrate as their protein base
- Both include iron fortification (meeting the AAP recommendation of iron-fortified formula), plus vitamins A, C, D, E, K, and B-complex
- Neither brand is objectively "better" — most pediatricians say the best formula is the one your baby tolerates well
🧪 Ingredient Breakdown: What's Actually Different
The core nutrition — calories (about 20 kcal/oz when mixed as directed), protein, carbohydrate, and fat — is nearly identical between Similac Pro-Advance and Enfamil NeuroPro. The differences are in the specific sources and add-ons.
- Fat blend: Similac uses high oleic safflower oil, soy oil, and coconut oil (no palm olein). Enfamil uses palm olein, coconut, soy, and high oleic sunflower oil. The palm olein debate centers on calcium absorption — some studies show slightly harder stools without it
- Carbohydrate source: Both use lactose as the primary carb, which is the sugar naturally found in breast milk
- DHA/ARA: Enfamil NeuroPro provides about 0.32% DHA (of total fatty acids) from Crypthecodinium cohnii oil and ARA from Mortierella alpina oil. Similac Pro-Advance also includes DHA/ARA from similar algal/fungal sources but at a somewhat lower concentration
- Prebiotics: Similac includes 2'-FL HMO and FOS (fructooligosaccharides). Enfamil NeuroPro includes polydextrose and GOS (galactooligosaccharides) as prebiotic fiber
- Unique to Enfamil: MFGM — a fat-and-protein complex found in the membrane surrounding milk fat globules, which is naturally present in breast milk and linked to cognitive development in some clinical studies
- Unique to Similac: OptiGRO blend (DHA, lutein, and vitamin E) plus the 2'-FL HMO prebiotic, which has been shown to support immune function in the gut
Worth knowing: All infant formula sold in the US must meet FDA nutritional standards under the Infant Formula Act. Both Similac and Enfamil exceed these minimums. The proprietary ingredients (HMO, MFGM) are meaningful differentiators, but no formula — from any brand — fully replicates breast milk.
💰 Price Comparison
Pricing is competitive and varies by retailer, size, and format. Here's what to expect for the standard powder tubs.
- Similac Pro-Advance: ~$30–$35 for a 20.1 oz tub; ~$44–$48 for a 30.8 oz value size
- Enfamil NeuroPro: ~$32–$36 for a 20.7 oz tub; ~$50–$54 for a 28.3 oz refill box
- Ready-to-feed bottles (both brands): $8–$12 for a pack of 6 (2 oz nursette bottles), significantly more per ounce but convenient for hospital bags and travel
- Store brands (Kirkland, Parent's Choice, Up&Up): $18–$24 for comparable sizes, all FDA-regulated to meet the same baseline requirements
- Both brands offer direct-to-door subscriptions on their websites and through Amazon Subscribe & Save, typically saving 5–10%
🏥 Specialty & Sensitive Lines Compared
Beyond the standard formulas, both Similac and Enfamil offer extensive specialty lines for babies with specific needs. Here's how they match up category by category.
- Gentle/partially hydrolyzed: Similac Total Comfort vs. Enfamil Gentlease — both use partially hydrolyzed whey protein and reduced lactose for easier digestion. Enfamil Gentlease is one of the best-selling formulas in the US overall
- Extensively hydrolyzed (cow's milk allergy): Similac Alimentum vs. Enfamil Nutramigen — both use casein hydrolysate protein that is broken down enough to be tolerated by most babies with cow's milk protein allergy. Nutramigen includes LGG probiotic (Lactobacillus rhamnosus GG)
- Soy-based: Similac Soy Isomil vs. Enfamil ProSobee — for babies with lactose intolerance or families preferring plant-based protein (note: soy formula is not recommended for premature infants)
- Spit-up/reflux: Similac for Spit-Up vs. Enfamil A.R. — both add rice starch to thicken in the stomach and reduce reflux episodes
- Premature/high-calorie: Similac NeoSure vs. Enfamil EnfaCare — 22 cal/oz formulas designed for preemies after hospital discharge, with extra calcium, phosphorus, and protein
👶 What Parents Actually Report
Parent experience varies widely — what works great for one baby may not suit another. That said, some common themes appear in parent reviews and forums.
- Taste: Many parents report Enfamil has a slightly milder, more "milky" taste compared to Similac. Babies who refuse one sometimes accept the other
- Mixing: Similac powder tends to dissolve somewhat more easily with less foaming, though both brands occasionally clump if water temperature is wrong
- Stool changes: Some parents notice firmer stools with Enfamil (possibly related to palm olein), while Similac users sometimes report looser stools. Both are typically within normal range
- Gas/fussiness: Anecdotally split — some babies do better on one vs. the other. Pediatricians often recommend trying the other brand if a baby seems uncomfortable after 1–2 weeks on a formula
- Availability: Both are widely available at Walmart, Target, CVS, Walgreens, Amazon, and grocery stores. During the 2022 formula shortage both brands had supply issues, but availability has since stabilized
✅ Which Should You Choose?
There is no single "winner" — both Similac and Enfamil are safe, nutritionally complete, and used successfully by millions of families. Here's a framework to help decide.
- Choose Similac Pro-Advance if: You want a no-palm-olein-oil formula, the 2'-FL HMO prebiotic appeals to you, or your baby has done well on Similac samples from the hospital
- Choose Enfamil NeuroPro if: The higher DHA level and MFGM brain-support ingredients matter to you, your baby prefers the taste, or your pediatrician specifically recommends it
- Consider store brand if: Budget is a concern — store-brand formulas meet the same FDA requirements and can save $500+ over a year of formula feeding
- For sensitive tummies: Try Enfamil Gentlease or Similac Total Comfort before switching brands entirely. The gentle versions address the most common issues (gas, fussiness, mild spit-up)
- Talk to your pediatrician if: Your baby has blood in stool, persistent vomiting, severe eczema, or failure to gain weight — these may indicate an allergy requiring a hypoallergenic formula