Currently the field of Weight Loss Specialist is not licensed in the United States. Practicing Weight Loss Specialists interested in using nutirtion tools are subject to the statutes of the relevant nutrition laws for their state.
If you practice in a state where nutrition is governed by a licensure with exclusive scope of practice, there is frequently an exemption for individuals working in weight loss programs which have been approved by and are actively supervised by a licensed dietitian and/or licensed nutritionist. Under this exemption, specialists can deliver approved material and guidance.
If you practice in a state where nutrition is governed by a licensure with exclusive scope of practice and you are not specifically identified in the law’s list of exemptions, you are not legally allowed to use nutrition tools in your practice.
An exception - If you are hired to practice nutrition by a doctor (delegated authority) whose license specifically includes the practice of nutrition, then you can practice under their supervision and within their scope of practice guidelines.