The Choline Question in Multivitamins
Choline is an essential nutrient that fewer than 10% of Americans get enough of — and it's absent from almost every multivitamin. Here's why it matters and what to do...
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Vitamin K2 MK-7: The Quiet Partner Vitamin D Needs
Vitamin K2 MK-7 directs the calcium that vitamin D3 absorbs — into bone and away from arteries. Here's the mechanism, the evidence, and who needs it most.
Why Some People Don't Methylate B-Vitamins (MTHFR)
MTHFR gene variants reduce the enzyme that converts folate to its active form. Here's what that means for your B vitamin choices and homocysteine levels.
How to Test Your Vitamin D at Home
At-home vitamin D tests now give lab-accurate 25(OH)D results for under $50. Here's which type to choose, how to collect correctly, and what the number means.
How to Avoid Iron + Calcium Absorption Conflict
Iron and calcium compete for the same transport system in your gut. Here's exactly how far apart to take them and what helps iron absorb despite other blockers.
How to Stop Forgetting Your Vitamins Without an App
Forgetting vitamins is a cue problem, not a willpower problem. Here are four environment-based fixes that work without apps or reminders.
