Similac Soy Isomil
Stage 1 · US · soy
- FDA Infant Formula Registration
- Corn syrup solids
- Soy
Verified · María López Botín
At a glance
- Brand
- Similac
- Stage
- 1 (0–12 months)
- Origin
- US
- Protein source
- soy
- Primary carbohydrate
- corn-syrup-solids
- DHA / ARA (per 100 ml)
- 11 mg / , mg
- Certifications
- FDA Infant Formula Registration
- Price (USD / tin)
- $34.99(verified 2026-04-20)
Cost calculator
What does Similac Similac Soy Isomil actually cost?
Slide to your baby's age. Numbers reflect AAP-typical consumption with peak at 3–6 months and tapering after solid foods at 6 months.
Daily intake
30 oz
Monthly cost
$202
Year-1 remaining
$1543
9 months
Compared at age 3mo
- Similac Similac Soy Isomil$202/mo
- Nutramigen Nutramigen Ready-to-Feed$57/mo$-145
- Premibio Premibio Premilait Stage 1$161/mo$-42
- Neocate Neocate Syneo Infant$737/mo+$534
Too few soy formulas are tracked for a meaningful category median, so this compares against all 105 tracked powder formulas instead.
Data table
| Metric | This formula | Median | Range |
|---|---|---|---|
| DHA (mg/100 ml) | 11.0 | 13.5 | 8.0–20.0 |
| Protein (g/100 ml) | 1.80 | 1.40 | 1.25–2.50 |
| Iron (mg/100 ml) | 1.20 | 1.00 | 0.50–2.00 |
| Price (USD/oz) | 1.46 | 1.77 | 0.83–5.32 |
Fat blend composition
Palm oil supplies palmitic acid (~25% of breast-milk fatty acids). Whole-milk fat preserves natural sn-2 palmitate and MFGM; sn-2 palmitate (structured palm) addresses the position issue; standard palm + supplementary oils is the conventional EU-organic approach. See the palm oil explainer for the hierarchy.
- Palm oil presentNo
- Soy oil or lecithinYes
Red flags (per label)
- Corn syrup solidsYes
- MaltodextrinNo
- CarrageenanNo
- Synthetic beta-caroteneNo
- GMO-derivedNo
Differentiators
- Soy protein isolate base (not cow milk)
- Lactose-free (no dairy carbohydrate)
- FDA-recognized under 21 CFR 107 soy formula category
- Standard indication: galactosemia, religious/ethical vegan, specific clinical situations
- Abbott's US soy-based infant formula, primary US competitor to Enfamil ProSobee in the soy category
Ingredients (resolved)
- corn-syrup-solids
- soy-protein-isolate
- vegetable-oil-blend
- safflower-oil
- soybean-oil
- coconut-oil
- sucrose
- fos
- mortierella-alpina-oil
- fish-oil
- potassium-citrate
- potassium-chloride
- calcium-phosphate
- calcium-carbonate
- magnesium-chloride
- sodium-chloride
- choline
- taurine
- l-carnitine
- amino-acids
- iron-sulfate
- zinc-sulfate
- vitamin-c
- inositol
- niacin
- pantothenic-acid
- copper-sulfate
- manganese-sulfate
- vitamin-e
- vitamin-a
- thiamin
- vitamin-b2-riboflavin
- vitamin-b6
- folic-acid
- potassium-iodide
- biotin
- vitamin-k1
- sodium-selenite
- vitamin-d3
- vitamin-b12
This site provides research and comparisons, not medical advice. Consult your pediatrician before changing your baby's formula.