Health and Medicine
Diet, food groups and vitamins, as general information.
Start here · Essential guide
A general overview of what a balanced diet means: the main food groups, why variety matters, how portions work and why individual needs differ from person to person.
Why fruit and vegetables feature in almost every set of dietary guidelines: fiber, variety, color, and practical, low-effort ways to fit more of them into your day.
A look at leafy greens: common types, the nutrients often associated with them, how to prepare them, and sensible cautions such as vitamin K and oxalates.
What omega-3 fats are, the difference between ALA, EPA and DHA, common food sources, and what research generally suggests, with sensible cautions and no medical claims.
What whole foods are, how they differ from heavily processed foods, how to read ingredient lists and nutrition labels, and simple swaps that are easy to keep up.
What vitamin B12 does in the body, which foods contain it, who may be at risk of low intake, and why testing and supplement decisions are best discussed with a clinician.
How vitamin D relates to sunlight, food and bone health, why needs vary with season, latitude, skin tone and age, and why testing and supplements need a clinician.
A plain guide to macronutrients and micronutrients: what carbohydrates, protein, fat, vitamins and minerals do in the body, and how energy from food is measured.
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