Health · 5 guides
Vitamins and minerals
Iron, calcium, vitamin D, B12 and magnesium: who needs more and which foods have them.
- Iron What iron does, UK daily amounts, who's most at risk of running low, the best iron-rich foods per serving, how to absorb more and signs of deficiency. 2 min read · 7 sources · Updated 25 September 2026
- Calcium What calcium does, how much you need by age, the best calcium-rich foods per serving (dairy and non-dairy), who needs more, and supplement safety. 2 min read · 6 sources · Updated 25 September 2026
- Vitamin D Why you need vitamin D, who in the UK should consider 10 µg (400 IU) a day and when, the safe upper limit, and the best food sources. 2 min read · 5 sources · Updated 25 September 2026
- Vitamin B12 What vitamin B12 does, how much you need, the best animal and vegan sources, who's most at risk of deficiency and the signs to watch for. 2 min read · 7 sources · Updated 25 September 2026
- Magnesium What magnesium does, how much you need, the richest foods per serving, who might run low, supplement limits and the truth about cramps and Epsom salts. 2 min read · 7 sources · Updated 25 September 2026