What the rat studies and small human trials of magnesium L-threonate measured, who funded them, and how much elemental magnesium you really get.
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 the magnesium and sleep trials really tested, why glycinate labels mislead, safe upper limits (NHMRC, NIH, EFSA), medicine interactions and better sleep first steps.
What trials in older adults show about creatine, strength and muscle, EFSA’s over-55 finding, how much to take, kidney test cautions and who should check with a doctor first.
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.
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.
Find EPA and DHA on any omega-3 label, check serving size, work out cost per 1,000 mg, and know what to check on cod liver, algae and plant oils.
What USP Verified, NSF Certified for Sport and Informed Sport actually check, how to confirm a seal on the register, and when a seal is worth paying for.
What spirulina really supplies per serving, why it is not a B12 source, contamination risks, who should ask a doctor first and how to judge a product.
What collagen joint trials actually measured, why hydrolysed and type II collagen differ, where the evidence is weak, and a checklist before you buy.