Formula Types - Milk Mixology 101
Breast milk substitute when breastfeeding insufficient/contraindicated.
- Cow's Milk-Based (CMBF):
- Standard, iron-fortified. Whey:casein ratio (e.g., 60:40) mimics breast milk.
- Caloric density: 20 kcal/oz (~0.67 kcal/mL).
- Soy-Based (SBF):
- Lactose-free; soy protein isolate.
- Uses: Galactosemia, hereditary lactase deficiency.
- ⚠️ Not for preterm, routine CMPA, colic.
- Protein Hydrolysate (PHF):
- Enzymatically hydrolyzed proteins.
- Extensively (eHF): Diagnosed CMPA, malabsorption.
- Partially (pHF): ?Atopy prevention (high-risk infants, debated).
- Amino Acid-Based (AAF):
- Elemental; severe CMPA, multiple food protein intolerances.
- Specialized Formulas:
- Preterm: ↑calories (22-24 kcal/oz), protein, micronutrients.
- For metabolic disorders (e.g., PKU-free).
⭐ Standard infant formulas: iron-fortified, 20 kcal/oz (approx. 0.67 kcal/mL).
Formula Composition - Nutrient Know-How
- Energy: Standard ~67 kcal/100ml; Preterm ~80 kcal/100ml.
- Protein: ~1.4-1.8 g/100ml; Whey:Casein ratio varies (e.g., 60:40 or 20:80). Hydrolyzed for allergy.
- Carbs: ~7-7.5 g/100ml; Lactose (milk-based) or alternatives (corn syrup, maltodextrin).
- Fats: ~3.3-3.6 g/100ml; Vegetable oils; Added DHA/ARA for neurodevelopment.
- Fortification: Iron (4-12 mg/L), Vitamin D (~400 IU/L).
Key Nutrient Comparison: Formula vs. Breast Milk
| Nutrient | Breast Milk (BM) | Standard Formula (SF) |
|---|---|---|
| Energy (kcal/dL) | ~67 | ~67 |
| Protein (g/dL) | ~1.1 (W:C 60:40) | ~1.5 (W:C variable) |
| CHO (g/dL) | ~7 (Lactose) | ~7.2 (Lactose/other) |
| Iron (mg/L) | 0.3 (high bioavail.) | 4-12 (fortified) |
| Vit D (IU/L) | <100 (suppl. needed) | ~400 (fortified) |
Feeding Techniques - Bottle Basics & Beyond
- Bottle & Nipple Essentials:
- Use BPA-free bottles.
- Nipple: Age-appropriate flow (newborns: slow).
- Sterilize daily: Boil (5-10 min) or use sterilizer.
- Feeding Best Practices:
- Position: Semi-upright (head elevated) to reduce aspiration & otitis media.
- Paced Bottle Feeding: Hold bottle horizontally, allow baby to control flow.
- Burp: Every 60-90 mL (or midway) and after feed.
- Safe Formula Preparation (WHO Guidelines):
- Storage & Safety:
- Prepared formula (at room temp): Use within 1 hour from start of feed.
- Prepared formula (refrigerated at 2-4°C): Use within 24 hours if made safely & cooled promptly.
- Discard any leftover formula in bottle post-feed.
⭐ Never microwave formula. Creates hot spots, risking severe burns.
Special Formulas - Tailored Tummies
| Formula Type | Key Indication(s) | Key Features/Notes |
|---|---|---|
| Preterm | Preterm (<37 wks), LBW (<2.5kg) | ↑ Cal (22-24 kcal/oz), protein, Ca, P, MCTs |
| Lactose-Free | Lactose intolerance | Corn syrup/sucrose; for diarrhea, gas |
| Soy-Based | Galactosemia, congenital lactase def., vegetarian | Not for preterm, CMPA (cross-reactivity) |
| Partially Hydrolyzed (pHF) | Fussiness, gas, allergy prophylaxis (fam Hx) | Not for established CMPA |
| Extensively Hydrolyzed (eHF) | CMPA, malabsorption | Hypoallergenic; smaller peptides |
| Amino Acid-Based (AAF) | Severe CMPA (eHF failure), multiple food allergies | Elemental; 100% free AAs |
| Anti-Regurgitation (AR) | GER (uncomplicated) | Thickened (e.g., rice starch) |
| Low Phenylalanine | Phenylketonuria (PKU) | Special dietary need |
High‑Yield Points - ⚡ Biggest Takeaways
- Exclusive breastfeeding for 6 months is ideal; formula is a suitable alternative.
- Standard formula: ~20 kcal/ounce (67 kcal/100ml); preterm formulas: 22-24 kcal/ounce.
- Cow's milk-based is most common; soy/hydrolyzed formulas for specific indications (e.g., allergy).
- Iron-fortified formula is crucial from birth to prevent iron deficiency anemia.
- Improper dilution risks malnutrition, dehydration, or electrolyte imbalance.
- Avoid unmodified cow's milk before 1 year (high renal solute load, low iron).
- Initiate complementary feeding around 6 months, not before 4 months.
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