This study explores the relationship between life satisfaction and salivary pH, considering the influences of sleep quality and perceived stress. Life satisfaction, a key aspect of subjective well-being, has been linked to various factors, including academic performance ³ and health. ² Recent research suggests indirect connections between life satisfaction and both perceived stress ⁴ and sleep quality.⁶ Additionally, salivary pH has been correlated with sleep quality and stress levels ^{1, 2}

Our research investigates salivary pH as a potential, easily accessible biomarker for life satisfaction among students. Participants underwent a series of evaluations, including stress, sleep quality, and life satisfaction assessments, and provided saliva samples for analysis. The study employs standard statistical methods, such as correlation and regression analysis, to examine these relationships. 

From the 45 samples collected, the results supported a moderate direct correlation between salivary pH and life satisfaction, a moderate indirect correlation between salivary pH and perceived stress and a weak indirect correlation between salivary pH and sleep quality. Additionally, a moderate indirect correlation between life satisfaction and perceived stress was found, aligning with the findings of past papers. ^1,2,4,6  This could highlight salivary pH as a practical and cost-effective tool for gauging life satisfaction, offering insights into student health and well-being.