It would probably be helpful to speak with your insurance agency. They may be able to give you some guidance, and you will probably need to adjust your policy to cover this venue. It is good to know before starting a new venture what you can and cannot do and remain covered by insurance.
Getting some legal advice can also be helpful, especially before providing nutritional advice. Many states consider it outside the scope of practice to dispense dietary advice unless one is a certified nutritionist. The question would be how this is affected when working online.