A Winnipeg mom was trying to sell her frozen breast milk online but was forced to remove the post.

Sara Wiens has three months' worth of breast milk her four-month-old son can't drink so rather than see it go to waste, she advertised it for sale on Kijiji.

But she didn't get the response she expected.

"[There were] quite a lot of negative responses," Wiens said, adding she was told to take the ad off the site because the sale of bodily fluids is not allowed.

There were about five people who expressed interest "but for various reasons they decided not to go that route," she said.

Wiens had pumped the milk and stored it for her son before she learned he had an allergy to cow's milk protein.

The milk was pumped while Wiens was consuming dairy products but she has since dropped that from her diet and her son is able to drink the milk she is now producing.

"When we found out my son had a cow's milk protein allergy … I had decided that we should let someone else use the milk," she said.

Wiens still wants to sell the milk but is lost about how to do it now.

There are breast milk banks in Canada but not in Winnipeg and it would cost too much to ship it to Vancouver, she said.