b12 injection makes me tired Why do I feel worse after a injection? Vitamin B12 Injection | Causes

When to Expect Results Most people begin to see changes within 12 weeks of consistent use

Improve GI issues: Get plenty of fiber, either in your diet or with the help of a research-backed supplement (only 5% of Americans are getting enough!)

Less than 1% of people with B12 deficiency report getting optic neuropathy

Great team (front end and pharmacist), support when needed

Good info Ritchie1268 I also ordered last week from same supplier and had them 3 days later im very impressed with them

Sub q should in theory give close to 100% bioavailability, but we really dont know the one PK study never tested it, so theres no measured number and no dosing conversion behind it