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Head to head
Kirkland Signature ProCare vs Parent's Choice Infant
In independent testing, Kirkland Signature ProCare showed lower heavy-metal levels overall (purity 73 vs 72). The full lab numbers, metal by metal:
| Purity score | 73B | 72B |
| Lead ppb | 1.7 | 2.4 |
| Cadmium ppb | 3 | 3.8 |
| Aluminum ppb | 314 | 171 |
| Price | $0.48/oz | $0.60/oz |
| Est. cost at 28 oz/day | $2.07/day | $2.61/day |
| Origin | US | US |
| Base | Cow's milk | Cow's milk |
| Buy | Buy |
Kirkland SignatureProCare
Parent's ChoiceInfant
Lab data: Consumer Reports independent testing, March 2025. Purity scores are relative to the tested cohort — methodology. Not medical advice; consult your pediatrician.