A professional that provides advice in a particular area of expertise such as substance use disorder prevention is called?

A professional who provides advice in a specific area of expertise, such as substance use disorder prevention, is best described as a consultant. Consultants are typically individuals who possess specialized knowledge and skills, allowing them to offer professional guidance and recommendations in their field. In the context of substance use disorder prevention, a consultant would likely have the training and experience to analyze issues related to prevention strategies and provide insights or solutions tailored to organizations or individuals seeking to enhance their prevention efforts.

While a mentor may offer support and guidance, their role is often more focused on personal development and nurturing a relationship with a mentee rather than delivering expert advice on specific issues. An advocate works to support or promote a cause but may not necessarily provide expert advice or consultations in their area of focus. A volunteer generally engages in unpaid work to benefit a cause or organization but does not typically hold a professional status that implies a higher level of expertise in a specific subject area. Hence, the role of a consultant aligns most closely with providing targeted, expert advice in specialized fields like substance use disorder prevention.