Most of the nutrient data comes from the USDA Foodcentral API

Biotin, Tyramine, Phenylethylamine (PEA), Histamine, Oxalic acid, Citric acid, Inositol, chromium, molybdenum

https://frida.fooddata.dk/

Boron: 

https://ods.od.nih.gov/factsheets/Boron-HealthProfessional/

Cocoa: 

https://www.longdom.org/open-access/chocolate-and-cocoa-products-as-a-source-of-essential-elements-in-nutrition-2155-9600.1000123.pdf