But unlike FDA approved drugs, registered dietitians and licensed physical therapists your service is not accredited and can't legally give the advice that it claims to give. As an example Ohio state law says that "only licensed dietitians can practice dietetics".

Practising dietetics is defined as including "Nutritional assessment to determine nutritional needs and to recommend appropriate nutritional intake" and "Nutritional counseling or education as components of preventive, curative, and restorative health care"

Either your service isn't doing those things (and outwardly it seems it is) or the service must be provided by a licensed dietitian to customers in Ohio or it is breaking Ohio state law.

[1] http://codes.ohio.gov/orc/4759