The scientists, physicians, and chemists who built our understanding of food and health — from the first clinical trial to the discovery of vitamins.
Conducted the first controlled clinical trial, proving citrus cures scurvy
Impact: Established experimental method in medicine; eventually led to discovery of vitamin C
Proved animals cannot survive without nitrogen-containing compounds (proteins)
Impact: Established concept of essential nutrients; led to identification of amino acids
Developed chemical methods to analyze food composition (protein, fat, carbohydrate)
Impact: Created foundation for nutritional analysis; his framework still underlies nutrition labels
Built the first human respiration calorimeter; created the 4-4-9 calorie system
Impact: Created the calorie measurement system used worldwide on every nutrition label
Linked beriberi to diet by observing that polished rice caused disease in chickens
Impact: Proved diseases could be caused by nutritional deficiency; Nobel Prize 1929
Coined the term "vitamine" and proposed the deficiency disease theory
Impact: Created unifying theory of deficiency diseases; gave vitamins their name
Isolated vitamin C from Hungarian paprika peppers after 200 years of searching
Impact: Completed the 200-year scurvy mystery; enabled industrial vitamin production; Nobel Prize 1937