The risk of bias scores ranged from 6.5 to 7, indicating a low risk of bias
Nature 434 , 658662 (2005)
The United Kingdom National Quality Assessment Scheme for Haematinic Assays warns against false B12 results and the risk of neurological damage: In the event of any discordance between clinical findings of B12 deficiency and a normal B12 laboratory result, then treatment should not be delayed
Never use medication that has been left unrefrigerated for extended periods
If the product has a specified duration of use, rinse off after this time has elapsed
Two better-absorbed options are N-acetylcysteine (NAC), which provides the rate-limiting amino acid cysteine so the body can build its own supply, and liposomal glutathione, which uses fat-based capsules to protect the molecule through digestion