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Impure products can contain: Incomplete synthesis fragments that may cause immune reactions Bacterial endotoxins from contaminated manufacturing Heavy metals from poor quality synthesis reagents Misidentified or substituted peptides entirely Degradation products from improper storage before sale Users who experience unusual or severe side effects should consider source quality as a potential cause
At very high oral doses (54 mg), gastrointestinal side effects increased significantly
What Is B12
Some of the most common symptoms of vitamin B12 deficiency are fatigue, memory issues, insomnia, stomach issues, etc
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