The crossword solution for the term 'Vitamin Supplement' is 'IRON'. IRON is an essential mineral that is found in many foods and is also available as a dietary supplement. It is important for the formation of hemoglobin, which carries oxygen throughout the body, and for the production of energy. IRON supplements are often recommended for people who are at risk of IRON deficiency, such as pregnant women, vegetarians, and those with certain medical conditions.