costco buyers share the latest on kirkland signature's newly enhanced infant formula by katie coleman costco photo studio katie coleman fills this month's consumer reporter slot with this behind- costco program email questions about this article to connection@ costco.com peaking as a mother who had to supplement her breast milk hands down it is a stressful situ- ation with many questions tied to it while a majority of moms start out breastfeeding-approximately 80% according to some data-the centers for disease control and prevention report feed their babies and those who feed come to the right place newly enhanced signaturetm procare infant formula change? with a product as important as ers staying on top of emerging science new data and other improvements through ongoing research matter of working with our supplier to add more micronutrients as well as more human milk oligosaccharides says haba assistant buyer jeff taylor "then we discuss how this will benefit our members."