10/25/2018: There are published cautions about a number of food substances.
https://www.consumerreports.org/vitamins-supplements/15-supplement-ingredients-to-always-avoid/
I have been very cautions as I have explored the health benefits of food supplements. I have done extensive testing and review of the literature on the food metabolite I am using; protocatechuic acid. It is safe. The FDA considers it Generally Recognized As Safe (GRAS) as a food additive for flavoring.
My first launch is www.4WhatAilsU.com This is an antioxidant pill. The web site has all the information.