Prohibits sale of certain diet pills and dietary supplements for muscle building to persons under 18 years of age under certain circumstances.

New Jersey's S 3987 prohibits the sale of over-the-counter diet pills and muscle-building dietary supplements to anyone under 18 years old, unless the minor is accompanied by a parent or guardian. Retailers and delivery sellers must obtain an adult signature for home deliveries and cannot sell these products to minors without parental presence. The bill excludes prescribed supplements and standard protein products (like protein powders without additional weight-loss ingredients). Violations carry a $750 civil penalty, enforced by local health agencies through municipal courts.