Rash or irritation at the injection site: Irritation from the medication or preservatives can cause injection site redness, pain, or swelling
Additional Credits: Arnold Schwarzenegger: Michael Ochs Archive/ Getty Images, Jose Canseco: Ron Vesely/ MLB Photos/ Getty Images, Lance Armstrong: Tim de Waele/ Corbis/ Getty Images, Ben Johnson: Mike Powel/ Allsport/ Getty Images, Liver King: Mega/ GC Images/ Getty Images, Joe Rogan: Carmen Mandato/ Getty Images, Chris Burnstead: Chris Bernacchi/ Diamond Images/ Getty Images Trevor Thieme is a Los Angeles-based writer and strength coach, and a former fitness editor at Mens Health
Below: what dihexa is, how it works, the cognitive benefits research points to, safety and what's still unknown, and answers to common questions
10.1016/j.bmcl.2017.10.076 39 Jn Tryggvi Njardarson (2000)