http://www.acefitness.org/acefit/healthy-living-article/60/5738/replace-coffee-with-these-energy-boosting-drinks?utm_source=SilverpopMailing&utm_medium=email&utm_campaign=ACE-Fit-Life-11-25-2015&utm_content=Consumer+Outreach&spMailingID=24048632&spUserID=NjU5NTYyNDUwNDcS1&spJobID=682034935&spReportId=NjgyMDM0OTM1S0