Exam prep · Free college course
A complete introductory college nutrition course built from the University of Hawai'i "Human Nutrition" text and checked against current authorities. It opens with basic concepts (the nutrient classes, energy density, how to judge nutrition claims), the body and digestion, and water and electrolytes, then works through the macronutrients (carbohydrates, lipids, protein), alcohol, and energy balance and weight, with worked math for kilocalories from macronutrients, BMI, Mifflin-St Jeor energy needs and percent Daily Value. The middle of the course covers vitamins, major minerals and trace minerals, then how to apply it all: the Dietary Reference Intakes, the Dietary Guidelines and the Nutrition Facts label. The last units cover nutrition across the lifespan, performance nutrition, food safety, and nutrition and disease. The U.S. guidelines changed in January 2026, so every guideline card names its edition (2025-2030, 2020-2025 or 2015-2020) instead of assuming one. No images: every formula and process is described fully in words. Cards are text only.
Copied straight from the course. In the app, each wrong option also gets its own explanation.
Card 1Which compound is the active hormone form of vitamin D, made in the kidney?
Calcitriol. Calcitriol (1,25-dihydroxyvitamin D) is the hormone that raises calcium absorption; it is not vitamin D3.
Card 2The Dietary Guidelines 2015-2020 recommended fat-free or low-fat dairy. What does the 2025-2030 edition recommend?
Full-fat dairy with no added sugars. The 2025-2030 edition names dairy a foundation food and shifts to full-fat versions without added sugars.
Card 3What is the USDA safe minimum internal temperature for ground beef?
160 F. Ground beef, pork, lamb and veal need 160 F because grinding spreads surface bacteria through the meat.
Yes. Create a free Encodr account and all 16 units and 1,154 cards are yours to study, with spaced repetition scheduling your reviews.
No. High school biology is enough. Every nutrition and physiology term is taught from scratch, in the order it is first used.
The current 2025-2030 edition, released in January 2026, plus the 2020-2025 and 2015-2020 editions for contrast. The textbook behind the course was written before the 2025-2030 edition, so cards on guidelines, added sugar, alcohol and protein name their edition in the question.
A modest amount: kilocalories from macronutrients, BMI, Mifflin-St Jeor energy needs, percent Daily Value from the Nutrition Facts label, and protein per kilogram. Every numeric card states its rounding rule, and all of them were independently recomputed before publishing.
No. Every process (the digestive path, lipoprotein transport, the food-safety steps) and formula is described fully in words instead.
The University of Hawai'i "Human Nutrition" open textbook (mostly CC BY-NC-SA 4.0), checked against the Dietary Reference Intakes, NIH Office of Dietary Supplements fact sheets, FDA label rules and the Dietary Guidelines. The cards are rewritten in plain language, not copied.