Im very skeptical
Antioxidant Depletion: In an ironnitrilotriacetic acid rat model of hemochromatosis, renal samples showed increases in reactive intermediates, accompanied by decreased availability of systems that protect against oxidation by iron, such as vitamin E levels, the glutathione system, thiol-specific antioxidants, and superoxide dismutase
Diabetes Care (2015) 38(2):26470
Capsules Independent Research Examines Nano Microneedle Technology, Bioavailability Science, and Consumer Evaluation Criteria for Transdermal NAD+ and Berberine Formats SAN LEANDRO, CA, Jan
[1] Those who cannot digest or absorb B12 as a result of inherited genetics or damage to the stomach and small intestine require more than can be absorbed from sublingual supplementation
it's a direct look into the protocols we use and recommend to ensure the peptide you start with is the peptide you end with