Besides its promising results, its highly evolving with better, more effective approaches
We see this all the time in our Murrells Inlet clients
To reduce bruising, apply gentle pressure (do not rub) for 10-15 seconds after injection, ice the site if needed, and be aware that blood thinners and supplements like fish oil increase bruising tendency
A high level of MMA is associated with a B12 deficiency, this is important because many people see this B12 marker as high on their test results and think that their B12 levels are fine
JVIM Toresson L (2016) Oral cobalamin supplementation in dogs with chronic enteropathies and hypocobalaminemia
Another benign effect, as mentioned, is bright yellow urine for a day after the injection