Peptide Academy · Supply
Also known as Cyanocobalamin / Methylcobalamin
Educational research summary, not medical advice. Many compounds here are not approved for human use. Talk to a licensed clinician before making any health decision.
The Peptide Academy is free to read. Members also get the research protocols for B12, dose and vial tracking, and an AI Advisor with cited sources. Try it all free for 7 days, no card needed.
Start my free 7-day trialEssential cobalamin vitamin, commonly injected in research and clinic settings for energy and deficiency correction.
Cofactor for methionine synthase and methylmalonyl-CoA mutase — required for DNA synthesis, myelin maintenance and red cell formation.
N/A — vitamin supplement (not a peptide)
Very safe; rare injection-site reactions.
Common side effects
Histamine reactions
Occasional redness or itching at the site.
Common fixes
Stop and get help
Basis: General clinical experience with B12 and L-carnitine injections. Educational only, not medical advice.
Warfarin
L-carnitine has been reported to increase warfarin's effect (higher INR).
Thyroid medicine (levothyroxine)
L-carnitine may reduce thyroid hormone activity; tell the prescriber.
Metformin and acid reducers (omeprazole, famotidine)
These lower B12 absorption from food over time, one reason people use injectable B12.
Everything else you take, including supplements
Bring a full list of medicines and supplements to your pharmacist or clinician before starting.
Basis: Documented L-carnitine and vitamin B12 interactions (NIH/MedlinePlus dietary supplement references). Educational only, not medical advice. Never stop or change a prescribed medicine without your prescriber.
Protocols & tracking are members-only
Members see the research protocols for B12, plan schedules, track every dose and vial, and ask the AI Advisor questions with cited sources. Try every Researcher feature free for 7 days, no card needed.