Dietitian: It is true that nutrients are most effective when provided by natural foods rather than artificial supplements. While it is also true that fat in one' s diet is generally unhealthy, eating raw carrots (which are rich in beta carotene) by themselves is nonetheless not an effective means of obtaining vitamin A, since the body cannot transform beta carotene into vitamin A unless it is consumed with at least some fat.
The statement that fat in one's diet is generally unhealthy is cited as a bad reason for adopting a dietary habit that the dietitian recommends.