Table 5.

Selected references on use of photonics/optical spectroscopy-based studies on saliva for clinical and other applications. (Other abnormal conditions)

1	LSPR	Cortisol, stress biomarker	2020 [Jo et al. 2020]	L.O.D: 0.1 nM
2	UV Absorption	Stress biomarkers in different body fluids	2019 [Ray and Steckl 2019]	L.O.D of cortisol: 0.5 μM
3	SERS, LIF, SPR	Diseases, drugs, general health	2019 [Ilea et al. 2019]	_
4	FTIR	Real-time checking of response to stress	2016 [Caetano Júnior et al. 2016]	_
5	SPR	Hormones (Cortisol, Testosterone)	2014 [Stevens et al. 2014, Mitchell and Lowe 2009]	L.O.D of cortisol: 1 ng/ml L.O.D of Testosterone: 29 pg/ml
6	SPR	Cortisol	2014 [Tahara et al. 2014]	L.O.D: 38 ppt
7	SPR	Cathespin G, Immune response	2011 [Gorodkiewicz et al. 2011]	L.O.D: 0.12 ng/ml
8	FTIR	Saliva of normal and diabetic pregnant women in each trimester.	2011 [Sultana et al. 2011]	_
9	SPR	Cathespin D	2010 [Gorodkiewicz and Regulska 2010]	L.O.D: 0.12 ng/ml
10	ATR-FTIR	Saliva biomarker; exercise induced stress. Real-time checking of response to stress.	2010 [Khaustova et al. 2010]	_
11	SPR	Cortisol and cortisone	2009 [Frasconi et al. 2009]	L.O.D: 10 μg/l