How to read the fibre line, what “source” and “high fibre” mean in AU/NZ, US and EU, carbs vs fibre, added fibres and how much to aim for.
How much vitamin C adults really need, what the cold trials found, why big doses are poorly absorbed, upper limits, who should check first and how to read the label.
What trials show about taking vitamin D3 with K2, how 4,000 IU compares with NHMRC, US and EU upper limits, the warfarin interaction and how to read a combination label.
Who needs vitamin B12, why absorption falls with age and dose, NHMRC/NIH/EFSA intakes, forms compared, medicine cautions and how to read the label.
Zinc needs and upper limits (40 mg NHMRC/NIH, 25 mg EFSA), the 2024 Cochrane cold findings, elemental zinc, copper and medicine cautions, and a dosing checklist.
Why to test before taking iron, elemental iron by form, the 45 mg upper limit, alternate-day dosing, medicine interactions, overload and child-poisoning safety.