This study aimed to evaluate the diagnostic significance of circulating mitochondrial-derived peptides, Humanin and MOTS-c, the long non-coding RNA GAS5, and exosomal microRNAs miR-21 and miR-103 in stratifying prostate diseases, including benign prostatic hyperplasia (BPH), precancerous lesions (PL), and prostate cancer (PCa). This evidence concerns the gene GAS5 and benign prostatic hyperplasia.