People with milk allergies can experience a range of mild to severe symptoms when exposed to even small amounts of milk proteins. Symptoms may include breathing difficulties that, in some cases, can be life threatening. To date, Health Canada has not received any reports of adverse reactions related to the use of NOW Brewer's Yeast Tablets. The products affected by this recall are bottles of 200 tablets (Lot numbers: 1401411, 1365681 and 1343111).