Voluntary fortification is ineffective to maintain the vitamin B12 and folate status of older Irish adults: evidence from the Irish Longitudinal Study on Ageing (TILDA)
The headaches seem to follow a different pattern (from what I remember) and tend to lessen over time - I had problems with headaches when I started using methyl but (nasal rather than injection) but it went away after a week or so
However, its always best to consult a healthcare professional to ensure its appropriate for your needs and to avoid unnecessary supplementation
Nature 424 (6952), 10251029
At Perfect B in Doral, FL, we prescribe TB-500 as part of a supervised recovery protocol that runs in three-month cycles with a progressive dosing ramp
For many, particularly those with underlying malabsorption issues like pernicious anaemia, injections are demonstrably more effective and stronger in their ability to deliver B12 directly into the bloodstream, bypassing the digestive systems limitations