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
That means you should definitely talk with a healthcare professional before starting a vitamin B12 supplement

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Some patients, especially those on long-term or high-dose B12 treatment, may develop complications like: 1
Whats more, MacGregor says that if someone is really low on B12, over-the-counter oral supplements are often sufficient and more affordable
[8] Moreover, the research team suggested that the peptide may have facilitated the recovery of blood flow in the ischemic muscle of the rat hind limb, as determined by laser Doppler scanning, indicating the compounds potential to promote angiogenesis