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Todd, at the University of Cambridge, used the LLD assay to extract the anti-pernicious anemia factor from liver extracts, purify it, and name it vitamin B 12
Finally, hydrogen peroxide is added and the water goes through an ultraviolet light processing, which is supposed to kill any contaminants that are left
Full-length T4 is the 43-residue, ~4.9 kDa endogenous peptide whose biology underpins virtually every claim made for TB-500
For instance, Vitamin B12 is known to support cardiovascular health by reducing levels of homocysteine, an amino acid linked to heart disease
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![Klow vs Glow Peptide: 5 Key Differences [Comparison 2026]](https://klow-peptide.com/images/content/heroes/klow-vs-glow.jpg)
