Since ARMRA is derived from dairy, it may not be suitable for those with severe lactose intolerance. That said, the total amount is small, as each serving of ARMRA Colostrum is just 1 gram (about 1/2 teaspoon). We have many customers who are lactose-sensitive and do well taking ARMRA on its own or with the addition of lactase enzyme - so we advise taking these personal factors into account. ARMRA does not contain casein protein (the most common culprit for those with a dairy allergy). Additionally, most dairy intolerance is is related to the way that dairy is processed - with high heat manufacturing and pasteurization which changes the shapes of the proteins, rendering them unrecognizable to the body. This is what triggers inflammation and digestive issues. ARMRA, though, uses proprietary, gentle, low-heat technology that retains all of the peptides and bioactive nutrients in their natural and bioavailable state. As such, ARMRA is actually anti-inflammatory and anti-allergenic. Many users with dairy intolerance opt to try ARMRA and tolerate it very well.