can someone please help me to write about these 3 famous nutritionists.

Adelle Davis,

John Harvey Kellogg,

Nestle Marion.

Describe contributions & timeframe. i want like brief description on these famous nutritions, like who they are when they started involving in nutrition, like overview of them. also two two books and article that they had publishes.

what are there primary sources and their secondary sources of these nutritionist

please please someone can help, providing brief description on each of them.

thank you