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The dose is often deliberately high, since most of it passes through and leaves the body
Insulin-like growth factor 1 and its analogs are most bioavailable when injected because they are not reliably absorbed through the digestive system or skin
Functional vitamin B12 deficiency Some people can experience problems related to a vitamin B12 deficiency, despite appearing to have normal levels of vitamin B12 in their blood
Tablets are convenient and suitable for many individuals
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