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Injections can also cause serious side effects if they are not administered properly

Studies using oral doses of 500 mg per day showed only modest, variable increases in plasma glutathione levels across subjects, with the melanin index reduction measurable only under controlled spectrophotometric conditions after four weeks of consistent supplementation [1]

A B12 injections effect can last anywhere from a couple of weeks to a few months, and the difference comes down to why you are deficient, how well your body holds on to B12, and the dose and schedule you are on

Supplementary tablets can be taken to account for a lack of Vitamin B12 in the diet

The stuff about nitric oxide and blood vessel function made sense to me from a biological standpoint

Treat the stack as a well-reasoned mechanistic bet backed by strong individual-compound animal data, not a clinically proven combined protocol