It contains substantial amounts of the chemical serotonin, which can enhance the sensitivity of the nervous system, and promote the release of «feel good» hormones from the brain. (get-a-wingman.com)
But the cacao in dark chocolate enhances sensitivity to insulin and helps lower blood sugar levels. (blog.paleohacks.com)
Their broad physics programme will be complemented by the measurements of three smaller experiments — TOTEM, LHCf and MoEDAL — which focus with enhanced sensitivity on specific features of proton collisions. (press.cern)