Immediate effect of sunlight exposure through blue glass on blood pressure in hypertensive patients: a randomized controlled trial.

Objective: Hypertension affects approximately 1.28 billion adults worldwide, driving the search for integrative therapeutic approaches alongside conventional treatments. While chromotherapy, particularly blue light exposure, has historical roots in traditional medicine and its specific impact on blood pressure regulation remains understudied So, the present study aims to investigate the immediate impact of exposure to blue glass through sunlight on blood pressure in hypertensive individuals.

Methods: This randomized controlled trial was carried out with a sample of 60 hypertensive patients, who were divided into two groups: a study group that received blue glass exposure for 20 min and a control group that received exposure to colourless glass. The primary outcome measures were systolic and diastolic blood pressure, pulse rate, and oxygen saturation levels.

Results: The results of the study revealed statistically significant differences in systolic blood pressure (p=0.006) and pulse rate (p=0.005) after the intervention in the study group and no such changes were noted in the control group.

Conclusions: The findings of this study suggest that blue glass exposure has a significant impact on reducing blood pressure and pulse rate in hypertensive patients, indicating its potential use as a integrative treatment in the management of hypertension.