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This pairing is really helpful during pregnancy, high-stress periods, or recovery
Today, Vitamin B12 deficiency is all too common and creates acute and chronic illnesses, as well as a variety of unpleasant symptoms
And since ferritin is a marker of long-term iron intake, it's perfect for determining whether that worn-down feeling can be linked to your diet
Several bioavailability inhibitors, such as pregnancy or genetic makeup, can significantly affect oral vitamin absorption
Some notice faster changes using injectable testosterone compared to other methods
While the NIH does not specify a tolerable upper intake level for vitamin B12, a study published in the JAMA Network Open found that high intakes of vitamin B12, such as from daily supplementation of 25 micrograms or higher, increased the risk of bone fracture [3] [4]
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