Joint and individual associations between multiple vitamins and sperm quality in adult men.

Front Nutr · 2025 · PMC11985434 · PMID 40225346

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a decreasing trendno p-value reported

Specifically, when the concentration of vitamin B1 elevated from the lowest to 60 nmol/L, the sperm concentration showed a decreasing trend.

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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.