Self-reported community sources describe headache, brain fog or mental fatigue, irritability, anxiety, nausea or GI upset, appetite and sleep changes, blood-pressure changes, and skin reactions when used transdermally in DMSO
& Chattipakorn, S
Even the National Institutes of Health website will tell you there is no toxicity to B12
It does make you look younger as it stimulates the telomerase activity which triggers telomere elongation
However, there are several issues with FMT as follows: biological mechanisms remain undescribed, donor stool will not always be available, risks and side effects remain unclear, and long-term safety data are extremely limited (Liu Y
Choosing based on price alone often leads to disappointment