I highly recommend them for HRT
"Comparative Bioavailability and Utilization of Particular Forms of B12 Supplements With Potential to Mitigate B12-related Genetic Polymorphisms"
Benefits and Bioavailability of Vitamin B Complex Injections Vitamin B complex injections, which can include cobalamin and vitamin B12, are quick, effective, and painless injections done in the arm but can also be given in other areas of the body to help treat pernicious anemia
If youre looking to boost energy levels, metabolism, weight loss, mood regulation, sleep, and mental focus, intramuscular injections can help
Geriatric Dosing Considerations Older adults often have health issues and take many medicines
That gave me confidence, and I wasn't disappointed