Question: what is the best vitamin for teenager?
Answer: Vitamin A. ... 
B Vitamins. ... 
Calcium. ... 
Zinc. ... 
Vitamin C. ... 
Vitamin D. Helps with: bone formation and maintaining adequate calcium levels. ... 
Iron. Helps with: red blood cell production and increase in muscle mass. ... 
Folic Acid. Helps with: metabolism and new cell production.