**4.2 Effects of stress on the comparison with before and after smelling "Zuko" incense by measuring alpha-amylase value in saliva**

We can find out few effects of stress for smelling "Zuko" incense by measuring alpha-amylase value in saliva from the results of **Table 1**, **Figures 13** and **14**.

From these results of alpha-amylase value in saliva, it was shown that the following discussions were obtained:


*Smelling "Zuko": Incense Rubbing into the Hands and Smelling the Hands Activates… DOI: http://dx.doi.org/10.5772/intechopen.88987*

5.Alpha-amylase value was almost all shown as a characteristic index of stress which was more increasing up after smelling "Zuko" incense than before smelling regardless of male/female and habit/no habit with putting the hands in daily life.

From these results of measuring alpha-amylase value in saliva, it can be considered that something stress on smelling "Zuko" incense was usually given to the subject.
