Keto Strong there is a strong association between red meat (i.e. beef and lamb) and colon and rectal cancer. Iron, which gives meat a red tint, can damage cells in the upper part of the large intestine. Safe to eat up to 500g of red meat per week. However, for every 50g taken (above this limit), the threat of cancer cells will certainly increase by 15%. Salted and smoked meat increases the risk...