Oral cancer is a significant global health concern, with a high mortality rate mainly
due to late-stage diagnosis. Early detection plays a critical role in improving patient outcomes,
highlighting the need for non-invasive and accessible screening methods. Salivary biomarkers
have emerged as a promising avenue for oral cancer detection, leveraging advancements in human
DNA and RNA analysis. Several DNA-based biomarkers, such as genetic mutations, chromosomal
aberrations, and epigenetic alterations, have shown promise in detecting oral cancer at
various stages. Likewise, RNA-based biomarkers, including microRNAs, long non-coding
RNAs, and messenger RNAs, have demonstrated potential for diagnosing oral cancer and predicting
treatment outcomes. The integration of high-throughput sequencing technologies, such as
next-generation sequencing and transcriptomic profiling, has enabled the identification of novel
biomarkers and provided deeper insights into the molecular mechanisms underlying oral cancer
development and progression. Despite the promising results, challenges remain in standardizing
sample collection, establishing robust biomarker panels, and validating their clinical utility.
Nevertheless, salivary biomarkers hold great promise as a non-invasive, cost-effective, and accessible
approach for oral cancer detection, ultimately leading to improved patient outcomes
through early diagnosis and intervention. The analysis of genetic material obtained from saliva
offers several advantages, including ease of collection, non-invasiveness, and the potential for
repeated sampling. Furthermore, saliva reflects the physiological and pathological status of the
oral cavity, making it an ideal source for biomarker discovery and validation. This article presents
a comprehensive review of the current research on salivary biomarkers for oral cancer detection,
focusing on insights gained from human DNA and RNA analysis.