Effect of Caffeine Intake on Finger Cold-Induced Vasodilation

Abstract

Caffeine intake before finger immersion in cold water does not result in a thermogenic effect and adversely affects CIVD responses, whereas exercise modifies CIVD temperature and time responses.

Caffeine exposure induces browning features in adipose tissue in vitro and in vivo

“…In addition, single point measures of supraclavicular temperature can be misleading as they cannot reliably detect the hottest region of brown fat as identified with thermal imaging approach used here 38 . Although caffeine has been reported to cause changes in blood flow 39–41 , this was not expected to cause substantial changes in skin temperature, as this typically does not occur until at least 2 h after caffeine consumption 34 . Further studies measuring the kinetics of caffeine-induced blood flow changes can help refine its impact on thermal analysis.…”

Vascular responses of the extremities to transdermal application of vasoactive agents in Caucasian and African descent individuals

“…There are various predisposing factors for cold injuries, these include: high altitude (Hashmi et al 1998); age (> 62 years) (Koutsavlis and Kosatsky 2003;Sawada 2005); gender (females) (Army Medical Surveillance Activity 2013), nicotine (Cleophas et al 1982;Waeber et al 1984) and caffeine consumption (Kim et al 2013). Ethnicity is also a risk factor; individuals of black African descent (AFD) are more susceptible than Caucasian (CAU) individuals to NFCI (Miller and Bjornson 1962;Taylor 1992;Candler and Ivey 1997;Conway and Husberg 1999;DeGroot et al 2003;Burgess and Macfarlane 2009).…”