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NatWonk – Dr Bier’s Research Reviews

NatWonk – Dr Bier’s Research Reviews

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Excess iodine intake: sources, assessment, and effects on thyroid function

December 14, 2025
| No Comments
| Endocrine Health

Comment: It is ‘common knowledge’ that higher iodine supplementation is dangerous. However this review clearly shows the distinction between the ‘healthy majority’ and the ‘vulnerable minority.’ While most individuals possess a robust capacity to handle high iodine loads (via the Wolff-Chaikoff escape mechanism), the data here is a reminder that doesn’t apply for specific subgroups. […]

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Iodine Excess as an Environmental Risk Factor for Autoimmune Thyroid Disease

December 14, 2025
| No Comments
| Endocrine Health

Comment: This review convincingly details how excess iodine drives autoimmunity at a molecular level, establishing a strong case for biological plausibility. However, it leaves us with significant uncertainty regarding when this becomes a clinical reality. Because the authors rely on a narrative overview rather than a systematic quantitative synthesis, It remains difficult to determine if […]

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Effect of iodine intake on thyroid diseases in China

December 14, 2025
| No Comments
| Endocrine Health

Comment: This study shows interesting nuances, and different than what is often reported about it. It shows a clear ‘ceiling effect’ for iodine toxicity. The jump in subclinical pathology occurs as soon as we leave deficiency, with no significant difference in risk between ‘more than adequate’ and ‘excessive’ intake. Importantly, this toxicity appears strictly subclinical; […]

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The Intriguing Thyroid Hormones-Lung Cancer Association as Exemplification of the Thyroid Hormones-Cancer Association: Three Decades of Evolving Research

December 14, 2025
| No Comments
| Cancer, Endocrine Health, Medications - General Pharmaceuticals

Comment: This is a fascinating review of a complex topic. The key clinical pearl here is the paradoxical finding that treatment-induced hypothyroidism (from TKIs/ICPis) often correlates with a favorable prognosis. It underscores the need to closely monitor thyroid function in these patients—not just as a side effect to be managed, but as a potential prognostic […]

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New Horizons in Menopause, Menopausal Hormone Therapy, and Alzheimer’s Disease: Current Insights and Future Directions

December 13, 2025
| No Comments
| Neurological & Cognitive Health

Comment: The argument for a ‘window of opportunity’—where MHT might actually be neuroprotective if timed correctly—is compelling. However I remain cautious about broadly applying this as I tend to always consider the risk side of the equation with synthetic medications.  The clinical management of Alzheimer’s disease (AD) prevention has long operated on the assumption that […]

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Variation in PCSK9 and HMGCR and Risk of Cardiovascular Disease and Diabetes

December 13, 2025
| No Comments
| Metabolic Health

Comment: This study presents a fascinating potential validation of the ‘on-target’ theory regarding lipid lowering and metabolic risk. The fact that genetically mimicking PCSK9 inhibition yields the same small increase in diabetes risk as mimicking statins implies a common downstream pathway—likely intracellular cholesterol accumulation in pancreatic beta cells. This means we should be looking at […]

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Menopausal hormone therapy and the female brain: Leveraging neuroimaging and prescription registry data from the UK Biobank cohort

December 11, 2025
| No Comments
| Medications - General Pharmaceuticals, Neurological & Cognitive Health

Comment: While the finding that current MHT use is associated with concerning neuroimaging markers (accelerated Brain Age Gap, smaller hippocampus) compared to never-users warrants attention, there’s another important aspect – the lack of a statistically significant difference between specific formulations—namely oral versus non-oral (topical/vaginal) administration and estrogen-only versus combined HRT. It is becoming commonly accepted […]

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Association Between Low-Density Lipoprotein Cholesterol-Lowering Genetic Variants and Risk of Type 2 Diabetes: A Meta-analysis

December 10, 2025
| No Comments
| Cardiovascular Health, Metabolic Health

Comment: This study is a potential critical piece of the puzzle because it bridges the gap between clinical observation and biological causality. We have known for some time from major clinical trials that statin therapy is associated with a slightly increased risk of developing type 2 diabetes. However, a lingering question has always been whether […]

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Grape seed powder improves renal failure of chronic kidney disease patients

December 9, 2025
| No Comments
| Renal Health

Comment: The finding that 2 g/day of Grape Seed Extract (GSE) resulted in a 32.67% decrease in proteinuria and a decrease in creatinine are definitely clinically relevant outcomes. Furthermore, the significant improvements in antioxidant status (e.g., almost doubling Catalase activity) provide a plausible mechanism for the renal benefits. The major issue is the massive risk […]

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Time-course study of different innate immune mediators produced by UV-irradiated skin: comparative effects of short and daily versus a single harmful UV exposure

December 6, 2025
| No Comments
| Immune System, Ultraviolet - Sun Exposure

Comment: I admit I love my UV, especially since moving back to New England – I have 3 apps on my phone so I know when it’s peak time to go outside. I also recognize that I have skin that tans and rarely burns, whereas other people don’t. It’s always been suspect to me that […]

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