September 2025 – NatWonk – Dr Bier's Research Reviews

Effect of Vitamin D2 Supplementation on 25-Hydroxyvitamin D3 Status: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

September 28, 2025

Comment I’ve been using a basic rule of thumb – D3 – D2 = real vitamin D This study doesn’t exactly say that, but does give me a basis for my general statement that D2 may be worse than no D at all as it negatively impacts D3 status. Summary Title of the Article: […]

Animal and plant protein usual intakes are not adversely associated with all-cause, cardiovascular disease-, or cancer-related mortality risk: an NHANES III analysis

September 20, 2025

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| CVD, Nutrition

Comment: Another study showing that animal protein intake does not increase death rates. In fact, this study links higher animal protein intake to a reduced risk of cancer, albeit small. Clinical Bottom Line This large cohort study found no association between the usual intake of either animal or plant protein and the risk of […]

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