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Others note temporary tiredness during the initial adjustment period
Hepatic enzyme activity varies with genetic polymorphisms (CYP3A4*1B alleles, for example, alter metabolic capacity)
If you are experiencing symptoms such as fatigue, weakness, numbness, or memory problems, these could be signs of a B12 deficiency
This is why B12 injections can be so effectivethey bypass the digestive system entirely, delivering the vitamin directly where your body can use it
For comparison, GHK-Cu differs from NAD+ therapy, which targets cellular energy pathways rather than tissue remodeling
doi: 10.1016/S0959-8049(05)80137-6
