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What does 'Research Use Only' mean

2012;4, article 67 doi: 10.1186/gm367

This has been subsequently supported by several other studies (18-21)
Crushing fatigue Fatigue in fibromyalgia relates to sleep dysfunction, mitochondrial issues, and central mechanisms

Kind of one of their top priorities

Because the vitamin deposits into muscle rather than entering the vasculature immediately, intramuscular delivery produces a sustained release effect
