Is it wise to choose a spicy life through foods?

An example of study where inferring causality is difficult
At least spicy foods seem not deleterious to health
http://www.bmj.com/content/351/bmj.h3942

http://www.medpagetoday.com/PrimaryCare/DietNutrition/52924?xid=nl_mpt_DHE_2015-08-05&eun=g432148d0r

http://business.time.com/2014/01/03/why-spicy-is-the-most-profitable-new-trend-in-food/

http://www.bmj.com/content/351/bmj.h4141