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If your only question is which works better for weight loss, the evidence is clearer for semaglutide than for lipotropic injections but better still depends on your health profile, goals, and what you can stick with long-term

These intramuscular injections, usually containing cyanocobalamin or methylcobalamin, are administered weekly or monthly as prescribed by a healthcare provider

For metabolic studies where steady-state NAD+ elevation or weight change is the endpoint, switching routes after steady state is achieved (day 5+) has minimal impact on final outcomes, but document the change and consider it during analysis.

Mechanism of Action Stimulates lipolysis via 3-adrenergic receptor-like activation

Studies also show it upregulates genes linked to healing and downregulates those associated with damaging inflammation [2]