This is an unrestricted procurement for Melatonin capsules/tablets in 1mg, 3mg, and 5mg doses to supply multiple federal agencies, with an estimated annual usage of over 1.8 million bottles. The contract period is for one base year plus four one-year option periods. The work involves providing an uninterrupted supply of products with specific, detailed packaging and labeling requirements, including the submission of product samples for evaluation. The solicitation will be issued electronically on or about March 2, 2026. No budget or specific performance location is detailed in this notice.