Living systems emit what is called ultraweak photon emission (UPE). This visually undetectable phenomenon has only been studied in humans for the last 30 years, finding that UPE is a complex process depending on multitude factors. Considering previous literature, this review discusses the current trends in the analysis of in vivo UPE from human beings. To this aim, Analytical Approaches Employed for UPE Measurement section focuses on the analytical techniques employed (photomultipliers and charged coupled device cameras), summarizing analytical conditions and reporting figures of merit reached to date. Then, Human UPE Depending on External Factors and Human UPE Depending on Internal Factors sections address external and internal factors, which have proved to affect UPE, pointing out the important influence on oxidative processes outside and inside the body, and also highlighting some personal states of the individuals affecting UPE. Last section is devoted to give a general view on the goals and achieved up to date regarding UPE measurement, emphasizing some potential applications as well as recommendations which include: use of UPE spectra information together with UPE intensity, larger populations (≈50-100 subjects), further studies on internal states of individuals, and use of statistical tools.

中文翻译：

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人类超弱光子发射：关键分析方面，结果和未来趋势-审查。

生命系统发出所谓的超弱光子发射（UPE）。在过去的30年中，这种在视觉上无法检测到的现象仅在人类中得到了研究，发现UPE是一个复杂的过程，取决于多种因素。考虑到以前的文献，本综述讨论了人类体内UPE分析的当前趋势。为此，UPE测量采用的分析方法部分重点介绍了所采用的分析技术（光电倍增管和带电耦合设备的摄像头），总结了分析条件并报告了迄今为止的优值。然后，取决于外部因素的人类UPE和取决于内部因素的人类UPE部分介绍了已证明会影响UPE的外部和内部因素，指出了对体内外氧化过程的重要影响，并强调了影响UPE的个体的某些个人状态。上一节专门介绍了目标，并就UPE测量取得了最新进展，重点介绍了一些潜在的应用以及建议，包括：使用UPE光谱信息以及UPE强度，人口更多（约50-100名受试者） ），对个人内部状态的进一步研究以及统计工具的使用。