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Common side effects include: Always talk to your doctor before taking B complex injections to make sure they are safe for you
Perhaps the delivery arrived on a hot day and the cold pack was warm by the time you opened the box
This suggests that even moderate increases in vitamin B12 levels can reduce the likelihood of testosterone deficiency in men with infertility
However, the effect of oral vitamin B 12 varies among patients (13), and the available randomized controlled trials comparing the two treatment regimens are considered to be of low quality (14)
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