As with any natural health product, you should consult a healthcare practitioner prior to use, especially if you are pregnant or breastfeeding or if you have kidney disorders. Consult a healthcare practitioner if you take any prescription medications including antacids, anticonvulsants, digoxin, cholestyramine, colestipol, mineral oil, steroids, statins or thiazide diuretics, or if you take other vitamin D supplements, multivitamin supplements containing vitamin D, or products containing vitamin D analogues. 15-20 mcg (600-800 IU) of vitamin D per day is adequate for most individuals. Consult a healthcare practitioner to determine if you would benefit from additional vitamin D before taking this product. Keep out of reach of children.