“Nutritionists are mainly focused on nutrition and how to eat health-wise.”
.....so that you don’t need to take vitamins and minerals. (which I don’t agree with BTW!)
I would just say nutritionists focus is on diet and exercise and the basics and less on supplements.
This is based on my conversations with family members in that area. I am no expert myself. They take supplements and have nothing against supplements. I am just not sure of their expertise in that area since they seem to focus less on it.
Good to consult your primary doctor, get educated on diet/nutrition (or consult a nutritionist) and also get savvy about supplements/minerals. All of the above.
Consult specialists who have devoted decades of their lives to a topic when you can.