Cyanocobalamin is a stable, lab-made form of B12 that your body converts into its active form
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Compared to placebo, B-vitamin supplementation in these older subjects also improved a measure of executive function, a secondary outcome of the trial (93)
Needle Insertion: Hold the syringe like a pencil and insert the needle quickly and smoothly at a 90-degree angle into the skin
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I stopped taking it at that point and instead started using just one a month, which seemed like it gave me a small boost at high points in training