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NatWonk – Dr Bier’s Research Reviews

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Month: September 2025

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

September 28, 2025
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| Miscellaneous

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 Clinical Bottom Line This […]

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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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| Cancer, Cardiovascular Health, Diet & Nutrition, Longevity & Mortality

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. This study was designed specifically to revisit the controversial 2014 Levine findings that suggested a four-fold cancer risk from animal protein. By applying more sophisticated statistical […]

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