Dear,

Yes it's have lot of branches in the Food Chain to become a nutritionist and its have a combination also

like we can say it as a Biochemestry and Physical science and chemestry and its nature for the food items. even you can consider as food Technology. And it deal with Processing, Manafuracting, treatment and distrubiting foods.

And some of are division on it.

• Food Science and Technology
• Food Scientists
• Food Technologists
• Growing Demand of Food Science & Technology Scinece Professionals 

 this might be help you.

ALL THE VERY BEST.