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Lyophilized peptides can remain stable at room temperature for days to weeks, which accommodates shipping and brief handling
Shin KS, Choi HS, Zhao TT, Suh KH, Kwon IH, Choi SO, Lee MK
The company does not disclose that there is no established Tolerable Upper Intake Level (UL) for vitamin B12 because it has low potential for toxicity due to it being a water-soluble vitamin, meaning that any excess amounts in your body will be excreted in your urine
EMBO J 5:12211227 Brigelius-Floh R, Maiorino M (2013) Glutathione peroxidases
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