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Reported effects are mild and transient: Localized irritation or redness at injection site, Mild fatigue or transient headache during initial days, Rare gastrointestinal upset (nausea, stomach discomfort)
The trace amount released during metabolism is far below harmful thresholds
At very low concentrations, peptides are more prone to adsorbing onto the glass walls of the vial, effectively reducing the amount available in solution over time
Even I, a medical student and someone who gets migraine, was not aware of its approval until a few years ago
Liver, clams, oysters, nutritional yeast, salmon, tuna, and fish meat are all very high in vitamin B12
Why Age Affects B12 Absorption As we get older, our bodies naturally go through changes, and one of those changes can affect how we process nutrients
