Probably the best of these programs is the BAC Tracker software
It is not approved by major health authorities for medical use, and its safety, dosage, and long-term effects are not well established
Now I think differently
Sanz-Cuesta T, Escortell-Mayor E, Cura-Gonzalez I et al (2020) Oral versus intramuscular administration of vitamin B12 for vitamin B12 deficiency in primary care: a pragmatic, randomized, non-inferiority clinical trial (OB12)
B12 Injections and Mental Health: Its important to understand, however, that for people with normal B12 levels, there is no strong scientific evidence that taking extra B12either in pill form or by injectionwill improve depression, anxiety, or mood disorders