is glutathione bad for hyperthyroidism system enhancement cardiac protection: pharmacological options against oxidative stress and ferroptosis Frontiers | Homocysteine and thyroid

B12 supplements may improve heart health by reducing homocysteine levels, a compound that is associated with an increased risk of heart disease

Just look at this figure at the website of the organization MitoAction: B12 deficiency usually affects like mitochondrial disorders many organ systems, especially the various parts of the nervous system

The receptors adapt over weeks, and the side effects that scare people off almost always trace back to moving too fast rather than to the compounds themselves

Instead they are packaged as research chemicals, daily chemicals, lab reagents and solvents, and even hair sprays