Steam and liquid water are two different forms of the same chemical (pure) substance: water.
Foods high in magnesium (an example of a nutrient)
Grain products: rich sources of complex and simple carbohydrates
Proteins are chains of amino acids found in many nutritious foods. Pictured above is a computer rendering of myoglobin, a protein found in muscles.
A manual water pump in China
Colorful fruits and vegetables may be components of a healthy diet.
New York National Guard Assisting Volunteers packing turkeys for families facing food insecurity.
MyPlate Game
Hippocrates lived in about 400 BC, and Galen and the understanding of nutrition followed him for centuries.
Anaxagoras
Followed for a millennium and a half, Galen (1st century) created the first coherent (although mistaken) theory of nutrition.
James Lind conducted in 1747 the first controlled clinical trial in modern times, and in 1753 published Treatise on Scurvy.
By containing his assistant, Armand Seguin, inside a rubber suit fitted with a tube sealed to his mouth with putty, Antoine Lavoisier first measured basal metabolic rate. Drawing by Madame Lavoisier (seated at right).
Takaki Kanehiro surmised that beriberi was a nutritional deficiency not an infectious disease.
Carl von Voit has been called the father of modern dietetics.

Categorization of the most common food components based on their macronutrients.

- List of macronutrients

List of macronutrients

- Human nutrition
Steam and liquid water are two different forms of the same chemical (pure) substance: water.

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