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Other Risk Factors: Additional factors that can contribute to B12 deficiency include alcohol abuse, certain medications (e.g., metformin, proton pump inhibitors), and underlying health conditions affecting absorption

Sperm Production Peptides affect spermatogonial proliferation and differentiation into spermatozoa by modulating local growth factor messages and gene expression

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PLoS One 9:e90617 Freitag S, Schachner M, Morellini F (2003) Behavioral alterations in mice deficient for the extracellular matrix glycoprotein tenascin-R
