Nutrients Explained
Protein, fiber, fats, calcium, vitamin D and iron in plain language.
Nutrient advice can sound technical, but most of it comes down to a few practical questions: how much do I need, which everyday foods provide it, and how do I fit those foods into meals I already eat?
This section answers those questions for the nutrients people ask about most, including protein, fiber, healthy fats, calcium, vitamin D and iron, along with a guide to building a balanced plate from the food groups. Each guide uses the Daily Values and food-source lists published by the FDA and the NIH Office of Dietary Supplements, and links every figure to the exact page it comes from.
These guides focus on food, not supplements. Needs differ with age, pregnancy, health conditions and medications, so if you think you may need more or less of a nutrient, or are considering a supplement, talk to your doctor or a registered dietitian first.
6 guides in Nutrients Explained
Calcium and Vitamin D: Food Sources and Daily Values
How much calcium and vitamin D you need by age, the Daily Values on food labels, and everyday foods, fortified picks and label checks that help you get both.
Fiber: Why It Matters and Everyday Food Sources
What dietary fiber is, how much you need, the 28g Daily Value, everyday high-fiber foods by group, and how to add fiber gradually without discomfort.
Healthy Fats: Saturated, Unsaturated and Trans Fats Explained
The difference between saturated, unsaturated and trans fats, what the 2025–2030 Dietary Guidelines say, food sources of each, and how to read fat on labels.
Iron: Food Sources and How to Absorb More
Heme vs nonheme iron, how much iron you need by age and life stage, the best food sources, and easy vitamin C pairings that help your body absorb plant iron.
Protein: How Much You Need and Easy Ways to Get It
What the 2025–2030 Dietary Guidelines say about protein, the protein Daily Value, everyday animal and plant protein foods, and easy ways to add protein to meals.
Building a Balanced Plate
Build balanced meals from the food groups in the current US Dietary Guidelines and the UK Eatwell Guide, with plate ideas for breakfast, lunch and dinner.