You cannot outrun Mayo First Post I exercise hard regularly and have always enjoyed eating delicious foods keeping in mind portion size.  Butter, ice cream, milkshakes, sweets,etc can easily be burnt off. But ! There is one type of junk that I simply cannot outrun. Mayonnaise. This is truly the Devil's creation. Any type of grease just cannot co-exist with an exercise regimen. It quickly piles on the flabby weight and also causes joint problems. Permanently banned it. It amazes me how fats dont realize the damage it does to them. Mayo must be banned from the face of the earth !!!!!!!!