1) assess clients' nutritional and health needs 2) counsel clients on nutrition issues and healthy eating habits 3) develop meal and nutrition plans, taking clients' preferences and budgets into account 4) evaluate and monitor the effects of nutrition plans and practices and make changes as needed.
Good luck and hope this helps!
My aunt went through a program to become a licensed nutritionist. She was passionate about the science and how important nutrition is to quality of life. What's more, I've seen articles (Reddit headlines... you know, the most reliable source of knowledge) about how nutrition-minded, individually catered meal plans in hospitals improves recovery time and chances of survival in certain demographics.
Nutrition is an often-underappreciated route to improving quality of life. I'm not sure what kinds of career opportunities you can find as a nutritionist, but I hope that you find one that is rewarding in all of the ways that matter.