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Who Should Consider This Test: If you often feel sick and cant figure out why

Whilst all of our content is written and reviewed by healthcare professionals, it is not intended to be substituted for or used as medical advice

Other people who may needs shots include those who have had gastrointestinal surgery if their digestive system cannot absorb vitamin B12 efficiently.

References (this section): NEJM (2023): Phase 2 trial publication Eli Lilly: Phase 2 results (mentions 24.2% at 48 weeks as a secondary endpoint) Eli Lilly (Dec 2025): Phase 3 TRIUMPH-4 topline results announcement Retatrutide side effects: what trials report (not medical advice) Searches like retatrutide side effects and side effects of retatrutide usually refer to events reported in clinical trial publications and sponsor summaries

Retatrutide's half-life is about 6 days (around 144 hours)