Several drugs, including colchicine, have been reported to reduce the absorption of methylcobalamin, vitamin B12
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It should be noted that these studies measured total Cbl levels, but as previously mentioned, the biologically available form of Cbl, TCN2-Cbl, comprises only approximately 2030% of the total Cbl level, which may lead to a significant number of false negatives for clb deficiency
The 8 to 12 week on / 4 to 8 week off pattern is extrapolated from pharmacological principles and community experience, not from controlled trials
As a result, oral supplementation may not be sufficient and injections may be necessary
relevant for GI protocols Liver and kidney panels safety monitoring, not outcome tracking Imaging Ultrasound useful for tracking tendon and ligament healing