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Diagnosis is often delayed due to gradual glandular damage and insidious symptom onset

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The rate of cell proliferation was expressed as fold control and compared between treated and non-treated cells using analysis of variance (ANOVA)

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Advantage: Convenient, familiar, non-invasive Challenge: Peptides face proteolytic degradation in the stomach and small intestine Bioavailability: Estimated at approximately 38% based on comparative pharmacology (see below) Transdermal (Patch) Some researchers have explored transdermal patches to deliver peptides: Advantage: Avoids first-pass metabolism and GI degradation Challenge: Intact skin is a strong barrier to peptide penetration Feasibility: Not commonly available commercially