Registered Dieticians are well educated (as of now, requires a Masters of Nutrition degree), and have to take continual education and bi-yearly license renewal tests, to stay relevant and up-to-date.

Nutritionists can literally be anybody who wants to call themselves a Nutritionist. No education/training/credentials necessary.

This is so true. I would also add that you tend to find more “Nutritionists” on social media pushing bad info. They are basically the chiropractors of the nutrition world.