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Earth's Best Organic Dairy vs Enfamil Enspire Optimum
In independent testing, Enfamil Enspire Optimum showed lower heavy-metal levels overall (purity 100 vs 87). The full lab numbers, metal by metal:
| Purity score | 87A | 100A |
| Lead ppb | 1.8 | — |
| Aluminum ppb | 477 | 50 |
| Price | $1.43/oz | $1.85/oz |
| Est. cost at 28 oz/day | $6.21/day | $8.05/day |
| Origin | US | US |
| Base | Cow's milk | Cow's milk |
| Buy | Buy |
Earth's BestOrganic Dairy
EnfamilEnspire Optimum
Lab data: Consumer Reports independent testing, March 2025. Purity scores are relative to the tested cohort — methodology. Not medical advice; consult your pediatrician.