N.J. Stat. Ann. § 45:16B-13

13. No person, business entity or its employees, agents, or representatives shall use the titles, "dietitian nutritionist," "nutritionist," "dietitian," "dietician," "nutrition counselor," "nutrition specialist," "LDN," "LD," "LN," "nutritional therapy practitioner," "nutritional therapy consultant," "certified nutrition therapy practitioner," "master nutrition therapist," "licensed dietitian nutritionist," "licensed nutritionist" or any other title, designation, words, letters, abbreviations, or insignia indicating one as a provider of medical nutrition therapy or as licensed under P.L.2019, c.331 (C.45:16B-1 et al.), unless licensed to practice dietetics and nutrition under the provisions of P.L.2019, c.331 (C.45:16B-1 et al.). A dietitian registered by the Commission on Dietetic Registration may use the title registered dietitian or registered dietitian nutritionist and the designation RD or RDN, and a nutritionist certified by the Board for Certification of Nutrition Specialists may use the title Certified Nutrition Specialist and the designation CNS , and an individual may use any lawfully earned federally trademarked title.