Here are several tests I analyze routinely for functional B12 deficiencies
These iron-containing proteins participate in numerous biological processes, including metabolism, biocatalysis, electron transport within the respiratory chain, oxygen transport, energy maintenance, and immune regulation [4,5,6,7]
A second hydrogen peroxide molecule acts as a reducing agent to regenerate the resting state enzyme, producing a molecule of oxygen and water.36 Hydrogen peroxide though at low amounts tends to regulate some physiological processes such as signaling in cell proliferation, cell death, carbohydrate metabolism, mitochondrial function, and platelet activation and maintenance of normal thiol redox-balance,37 however, at high concentrations it has been reported to be very deleterious to cells.38 Hence, the ability of CAT to effectively limit H2O2 concentration in cells underlines its importance in the aforementioned physiological processes as well as being a first line antioxidant defense enzyme
Researchers have so far only reported links to potential eye problems, not a cause and effect
BPC-157: The Recovery Component BPC-157 is a 15-amino-acid peptide originally identified in human gastric juice