Consumers are being urged to throw out Slim-Fast ready-to-drink meal replacement shakes due to fears the products could be contaminated with an illness-causing bacteria.

Unilever Canada has issued a voluntary recall that covers "the whole line" of ready-to-drink shakes, Sean McPhee, a company spokesperson, told CTV.ca.

The Canadian Food Inspection Agency issues a health alert saying the canned products, which are sold in cartons of six, may be contaminated by Bacillus cereus. The bacteria can cause vomiting or diarrhea.

Both the CFIA and the company say there's little chance of becoming seriously ill from the drinks. However, all four flavours of the shakes, regardless of lot codes or best-by dates, should be immediately disposed of.

The recall does not affect other Slim-Fast goods, such as bars powdered shakes.

Consumers who discard the ready-to-drink products can call Unilever Canada at 1-800-896-9479 to receive a refund.