By the 4th shot I had splitting headache (which I never get) and had to stop
Fatigue Feeling tired or weak on a regular basis can be an indication of low levels of vitamin B12
This peptide promotes tissue repair and regeneration by enhancing angiogenesis (the formation of new blood vessels) and increasing collagen production, making it highly effective for recovery from injuries and chronic conditions
Introduction Cognitive decline may occur for a variety of reasons, including the accumulation of senescent cells, 1 excessive oxidative stress, 2 mitochondrial dysfunction, 3 loss of apoptosis, 4 environmental toxins 5,6 depletion of stem cells, 7 telomere shortening, 8 inefficient cell communication, 9 epigenetic alterations 10 and neuroinflammation
Educational reference
This can help you gauge how much vitamin B12 should be in that injectable dose