Correlation between Serum Zinc Levels and Levodopa in Parkinson's Disease.

Nutrients · 2021 · PMC8621473 · PMID 34836369

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highly significantno p-value reported

In Japanese adults, a highly significant inverse correlation was observed between age and zinc concentration in hair [ 18 ], which led us to consider an age-related decrease in zinc concentration in our study.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.