Yes, you can combine IM injections with other supplements
Elevated serum B12 levels may sometimes indicate underlying medical conditions rather than true overdose, warranting clinical investigation to exclude haematological disorders, liver disease, or renal impairment
At time of writing, I have been taking the tablets for six weeks, so it is far too early to say whether they are doing me any good, but my early impression is positive and its my intention to continue for 24 weeks, the length of time of the Cari Loder trial
doi: 10.3390/jcm13082176
(1996) Vitamin B12 enhances the phase-response of circadian melatonin rhythm to a single bright light exposure in humans
Furthermore, some people may experience a reddish colour of urine: this is a natural phenomenon as vitamin B12 contains cobalt