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But if you want to go deep, N Acetyl Epitalon Amidate is the compound you need in your stack

10.1016/j.psyneuen.2013.07.019 Psychoneuroendocrinology 3 AgostinhoF
When total B12 measurements are unreliable, your doctor may request additional tests such as holotranscobalamin (active B12), methylmalonic acid, or homocysteine to assess your true B12 status more accurately
More water lowers concentration and raises draw volume
