Physicians have said that, in common with other "cancer diets", there is no evidence of effectiveness and some risk of harm.[14] Budwig protocol (or Budwig diet) – an "anti-cancer" diet developed in the 1950s by Johanna Budwig (1908–2003). The diet is rich in flaxseed oil mixed with cottage cheese, and emphasizes meals high in fruit, vegetables, and fiber; it avoids sugar, animal fats, salad oil, meats, butter, and especially margarine.