I'm in a conventional dietetics program, which I would probably recommend over other nutrition programs if you are interested in being able to work with a wide variety of people and appear accredited to them. It's amazing how as soon as you say "I'm a nutritionist" instead of "I'm a dietitian", peoples eyes immediately glaze over, and hardly any scientists will take you seriously. I've switched into my program after getting my way halfway through a microbiology/chemistry degree, which made it relatively easy for prerequisites, but if you haven't taken any science it's a bit of a pain to get into. My program length is 5 years, so it is also a big commitment. It is true, some of the nutrition courses are absolutely painful, but if you are lucky you will be able to compliment your program with lots of useful courses (statistics, media writing, business management, organic chemistry, animal physiology...).
I thought that the profs were going to be tough to deal with in a conventional dietetics program, but it surprised me how open-minded my nutrition profs have been so far. They are true scientists, and will be the first ones to tell you that we know way less about nutrition than we let on. They are also very upfront with government recommendations and the effects that lobbyists have had on the food system. I complained about how outdated one of our textbooks were to one of my profs, and she told me to highlight every statement I disagreed with, and keep the textbook with me for the rest of my degree program. If there is any statement I cannot solve, she said she would back me as a teacher sponsor if I applied for a research grant. She also prefixed our whole section on lipids to our class as "for the record, you need to know this for the tests, but I agree with very few things I am about to tell you. It is your job to find out why, and come back to me with your arguments". We also have lots of guest talks by anthropologists, which has been one of my favourite aspects of the program. Amazing insight, first hand, from all over the world, brought into the classroom.
One of the things I didn't think about: the actual students in the program. Having been in microbiology/chemistry, I was more used to conventional, "purist" scientists. Nutrition/dietetics students have this attitude of blaming and shaming the overweight, and most of the students are females. It is actually quite upsetting, I got very worked up one class hearing people talk about how the government should take away any child who is in the 90th percentile away from their parents. I went to the school services and the faculty department to talk to them about this incident, and they said this is very typical of first year dietetics classes, and that is why they are trying to get as many anthropologists/psychologists into the classroom in the first year. But yeah, people are getting more tolerant, but be prepared to be surround by students that are not the slightest bit overweight, wear yoga pants, were athletes in high school, and eat Lean Cuisine. Seriously, no one can cook. It's weird.
Overall: right choice for me, and what I want to do in my future, but probably won't fit many people.