This is a commonly referenced study from 1963 claiming a half-life of 5-6 days: nature.com/articles/198200a0 Although I would not cite it as an authority, the six-day half-life has also made it onto the B12 page in Wikipedia, seemingly unchallenged
The supplier company is located in Hangzhou, Zhejiang, and is one of the leading sellers of listed products
Side effects tend to be most pronounced in the first few weeks of therapy and generally improve over time as your body gets used to the medication
The goal of chelation therapy is to use chelators like dimercaptosuccinic acid (DMSA) periodically over time to help remove dangerous accumulation of toxins that are capable of damaging the liver, brain, or other organs
10.1128/AAC.00478-16 122 Van den BroeckF.SavillN
However, the results depend on the number of sessions taken and your metabolism