when do vitamin b12 injections start to work How Long Does It Take For Work? How Long Do B12 Injections

Following your initial treatment period, you might need to receive the shots once a month for three months, and then reduce it to once every three months

If you have signs of B12 deficiency despite a normal test result, it may be worth discussing a trial of B12 supplementation with your GP, as sometimes (for example, due to genetic variations) B12 struggles to enter cells, so deficiency symptoms can occur despite seemingly healthy blood levels

No significant food interactions - GLP-1 medications: Food doesn't affect absorption of injected GLP-1, but eating patterns change significantly on GLP-1

A separate meta-analysis that pooled results of trials in older adults with mild cognitive impairment found B-vitamin supplementation (6 to 24 months, depending on the trial) had no benefits on various cognitive parameters, including executive function, information processing speed, and episodic memory (90)