The claim that vitamin D needs K2 or it hardens your arteries, measured against the trials that actually scanned people's arteries.
Biochemistry, nutrition and metabolism
Ph.D. following the molecular trail
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Do You Need to Take Vitamin D with Magnesium & K2?
For most of a decade, vitamin D came with a warning: take it on its own, and the calcium it raises ends up in your arteries instead of your bones.
Latest Field Note
Does Vitamin D Without K2 Calcify Your Arteries?
The claim that vitamin D needs K2 or it hardens your arteries, measured against the trials that actually scanned people's arteries.
Previous Issues
Does Vitamin D Without K2 Calcify Your Arteries?
Creatine Is Sold for Your Brain. We Still Can't Reliably Measure Whether It Arrives.
Everyone is selling creatine for the brain now. Thirty years of research, and the delivery question is still open.
Apigenin Is Trending For Sleep And NAD+. Here Is What The Science Says.
The two claims driving apigenin sales have the weakest human evidence. The preclinical data that's genuinely compelling isn't on the label.
Folic Acid: Poison, Useless, or the Most Successful Supplement in History?
The most successful fortification in modern history. The internet says it's toxic. The answer involves an enzyme nobody's talking about.
Every Magnesium Form Is Sold by Organ. The Human Evidence Doesn't Exist
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Making Sense of the New Dietary Guidelines Controversy
The 2025-2030 guidelines sparked outrage over seed oils and saturated fat. Here's what the committee actually wrote.
The Truth About Rancid Fish Oil
Omega-3 supplements oxidize. The question is how much, how fast, and whether the testing data matches what's on the label.