Similar to the others, this is purely a defense mechanism from your mother, who is in fear that you would eat something that has been touted by the "experts" over many years as an unhealthy diet. Given your circumstances, understanding where she's coming from despite her misconceptions is the only way to go. Know that she's not criticizing you personally, and may be concerned that you will suffer a terrible fate from this diet leaving her all alone. I agree, love your mom, vent here and with your husband when necessary. You're persistence is impressive.