A free, self-paced textbook in 6 chapters. Read a chapter, then drill it with the 170 companion flashcards using spaced repetition.
Nutrition is the science of how food and its components affect the body, encompassing ingestion, digestion, absorption, and utilization of nutrients for growth, maintenance, and re...
Carbohydrates are the body's primary energy source at 4 kcal/g, divided into simple sugars that digest quickly for fast energy and complex starches that release glucose more gradua...
Vitamins are organic compounds that regulate metabolism, support immunity, and act as antioxidants. The fat-soluble vitamins A, D, E, and K are stored in adipose tissue and liver,...
Daily energy expenditure rests on three components: basal metabolic rate (BMR), which accounts for 60-75% and represents calories burned at rest for vital functions, calculated by...
A balanced diet provides adequate nutrients from all food groups in proper proportions, with MyPlate guidance recommending half the plate from fruits and vegetables, plus whole gra...
The gut microbiome, comprising trillions of microbes, profoundly influences digestion, immunity, and even mood. Prebiotics, including selectively fermented substrates like inulin,...