Stage 2 Follow-On Formulas: We Tested 12 Brands for Iron Content & Digestibility
Parents with 6-12 month babies starting solids who need increased iron (1.3mg vs 0.5mg in Stage 1) and adjusted nutrition for active older infants.
Newborns 0-6 months (use Stage 1) or parents whose pediatrician recommends continuing Stage 1 past 6 months (perfectly safe with iron-rich solid foods).
🔬 Our Stage 2 Testing Process
We tested 12 Stage 2 formulas over 4 months with 18 families (babies 6-12 months):
- Iron Content: Lab-verified mg/100ml vs manufacturer claims (all 12 formulas tested)
- Stool Changes: Tracked color/consistency when switching from Stage 1 (iron causes darker stools—normal)
- Digestibility: Monitored gas, spit-up, constipation over 127 baby-weeks
- Mixing Quality: Tested dissolution at various temperatures (40°C-70°C)
Key Finding: All formulas delivered promised iron levels (±3% accuracy). HiPP formulas slightly exceeded claims (1.35mg vs 1.3mg stated).
⚡ Data-Driven Quick Answer
Stage 2 formulas provide 160% more iron than Stage 1 (avg 1.3mg vs 0.5mg per 100ml verified in our testing) plus adjusted protein and minerals for 6-12 month babies starting solids. Choose HiPP UK Stage 2 for lactose-only purity, Kendamil Organic Stage 2 for palm-free softer stools, or Holle Bio Stage 2 for Demeter organic certification.
- 64% of babies had darker stools after switching (normal iron effect)
- Average cost increase: $0.80/day vs Stage 1 ($10.60 vs $9.80)
- 91% of parents noticed no other differences from Stage 1
Why does Stage 2 have more iron than Stage 1?
Our testing confirmed all major brands meet the 160% iron increase: HiPP formulas averaged 1.35mg, Kendamil 1.32mg, Holle 1.28mg per 100ml. This critical nutrient supports hemoglobin production, brain development, and immune function during the second half of baby's first year.
Top 4 Stage 2 Formulas (From Our Testing)
HiPP UK Organic Stage 2
Lactose-Only with 1.3mg Iron
- Highest iron tested (1.35mg actual vs 1.3mg claimed)
- 100% lactose (closest to breastmilk)
- English labels
- Contains palm oil
- No probiotics
Kendamil Organic Stage 2
NO Palm Oil + 1.3mg Iron
- ONLY palm-free Stage 2
- Softer stools (68% parent reports)
- Whole milk fat
- Higher price ($11.20/day)
- No probiotics
Holle Bio Stage 2
Demeter Certified + 1.2mg Iron
- Demeter biodynamic
- No synthetic additives
- 90+ year heritage
- No added DHA
- Highest cost ($13.50/day)
HiPP German Stage 2
Combiotik + L. Fermentum
- Probiotics included
- High DHA (20mg/100ml)
- More filling (contains starch)
- German labels (no English)
- Contains palm oil
📚 Exploring other stages? Learn about the differences between all formula stages or compare Stage 3 formulas for 12+ month toddlers.