Arlington, Texas | Made in USA All Berryman products, including B-12 ChemTool, sold by our company (Carbon Clean Poland Sp
More so, as stated in this 2019 study, "there is no established upper limit for vitamin B12 intake, as it has a low potential for toxicity." Although taking extremely high dosages of vitamin B12 is deemed safe, it is still not recommended to go above and beyond recommended vitamin B12 intake levels as mentioned above

Starting Dosage Protocol Most beginner-friendly protocols follow this conservative escalation model: Week 14 : 2.5 mg once weekly (starting dose) Week 58 : 5 mg once weekly Optional Increase : 7.5 mg 10 mg up to 15 mg weekly (only as needed) Gradual dose escalation reduces the risk of nausea, vomiting, and gastrointestinal intolerance while maintaining efficacy. Min et al., Drugs in Context Injection Guidance Use an insulin syringe or pre-filled pen (depending on prescription or compounded version) Inject into fatty tissue: abdomen, thigh, or back of the arm Rotate sites weekly to reduce local irritation Timing and Consistency Pick a consistent day and time each week (e.g., Sunday morning), and set reminders
PMID 10726422