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It may also help reduce fatigue and mental fog, making it easier to stay active and focused on lifestyle changes
Once a dog has begun taking a vitamin B12 supplement, small improvements may be seen in just a few days, but it can take several weeks before the dog fully responds to treatment.
This may happen when: dosing is increased too quickly hydration is poor peptides are combined with other therapies injections are taken improperly Headaches Headaches are occasionally reported during peptide therapy
Vitamin B12 may also help with fatigue and weakness, especially in those with deficiency
This is a commonly referenced study from 1963 claiming a half-life of 5-6 days: nature.com/articles/198200a0 Although I would not cite it as an authority, the six-day half-life has also made it onto the B12 page in Wikipedia, seemingly unchallenged
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