sublingual b12 vs injection Vitamin Injections Oral vs. Intramuscular Vitamin B12

[9] Visual disturbances have been reported in patients with Leber hereditary optic neuropathy, and rapid B12 administration may precipitate optic nerve atrophy in this genetically predisposed population, mandating extreme caution or alternative therapy

How well your body absorbs these nutrients can change based on several things

The Endocrine Society publishes clinical practice guidelines on obesity management that include sections on incretin-based therapies

Combine resistance training and aerobic activitypreclinical data suggest synergy with exercise [10]

If AHK-Cu is used at all, the better-evidenced route for its hydrophilic chemistry is topical [5] , and even then it is at most a speculative cosmetic adjunct to an evidence-based plan not a stand-alone solution, and certainly not something the data support injecting