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Vitamins and minerals: forms, doses, absorption

Why the chemical form matters, what a useful dose is and how to read the label.

1. Heme and non-heme iron: what raises and lowers absorptionFoundations · 4 min · free
2. Iodine: iodized salt, seaweed and caution with the thyroidCounselling · 4 min
3. Magnesium from food and who risks low levelsFoundations · 4 min
4. Selenium: Brazil nuts, upper limits and the supplement sumCounselling · 4 min
5. Vitamin K, leafy greens and anticoagulantsAdvanced · 5 min
6. Multi-form magnesium complexes: what to read on the labelCounselling · 5 min
7. Liposomal B complex: what else is in the sachetCounselling · 5 min
8. Iron deficiency anemia: when iron is not the first answerCounselling · 5 min
9. High-dose antioxidants: beta-carotene, vitamin E and resveratrolAdvanced · 5 min
10. High-dose vitamin B12 or B complex: when you need eachCounselling · 5 min
11. Magnesium bisglycinate: the front-label milligrams aren't the magnesiumCounselling · 4 min
12. Liquid iron tonics: how much iron they deliver and when it's not enoughCounselling · 5 min
13. Vitamin D from several products: how to add up dosesCounselling · 5 min
14. Calcium from eggshell, coral or algae: what you're really comparingCounselling · 5 min
15. Which magnesium form for whom: choose by goal and toleranceCounselling · 4 min
16. Normal serum magnesium and spacing it from medicinesCounselling · 5 min
17. D3, K2, calcium and magnesium complexes: what fits in a capsuleCounselling · 5 min
18. Liquid or capsule vitamin D: how to work out the daily doseFoundations · 4 min
19. 5000 IU vitamin D: why it isn't automatically a daily doseCounselling · 4 min
20. Vitamin D3 oral spray: who this form makes sense forFoundations · 4 min
21. Two multivitamins, two profiles: iodine, iron and vitamin ACounselling · 5 min
22. 300% of the reference value: a lot, too little or too much?Foundations · 5 min
23. Liposomal iron with vitamin C: what the form changes and what it doesn'tCounselling · 4 min
24. Iron that causes nausea: improving tolerance without giving upCounselling · 5 min
25. Normal haemoglobin, but empty iron storesCounselling · 5 min
26. High-dose L-methylfolate is not the folic acid used for pregnancyAdvanced · 5 min
27. Cramps and the potassium formula: who is at riskCounselling · 5 min
28. Which meal goes with the supplement: fat, coffee and calciumFoundations · 4 min
29. Methylation: what folate, vitamin B12 and homocysteine doAdvanced · 5 min
30. Signs of mineral deficiency: questions, not a diagnosisFoundations · 5 min
31. Vitamin B12 absorption: who is at risk besides vegansCounselling · 4 min
32. The calcium paradox: why more does not mean better bonesCounselling · 5 min