Hindi ako familiar sa Vonwelt specifically, momsh, pero if it's calcium carbonate from a reputable source, generally okay lang yan, maraming moms around me ang gumagamit ng calcium supplements during pregnancy at breastfeeding. Best to check with your OB though just to be sure it's the right dosage and form for you, especially since there are lots of calcium options out there and mas better kung alam mo exactly kung ano ang best fit sa body mo!