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It is currently completing Phase 3 TRIUMPH trials and is available for research use in lyophilized (freeze-dried powder) form for the latest on [when retatrutide will be FDA approved](/guides/retatrutide-fda-approval-2026-timeline-status), see our regulatory timeline tracker
It tops up your B12 levels quickly
It's inert, safe from microbial growth, and resistant to degradation
Discovered in 2015, it has become a central tool in research on AMPK signalling, metabolic homeostasis, and mitochondrial-nuclear crosstalk
That said, any protocol that combines multiple compounds should be supervised by a clinician who can look at your full health picture and flag anything that might interact
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