is glutathione bad for hypothyroidism & Thyroid Health: The Master Antioxidant Ketogenic Diet and Thyroid Function:

Mushroom polysaccharides, including those from Lentinus edodes, Flammulina velutipes, Pleurotus ostreatus, and Grifola frondosa, also show potent free radical scavenging abilities (158, 159)

injections are preferred for severe deficiency, neurologic involvement, or unreliable absorption

It's about a methodology

These findings align with human PET studies showing diminished BDNF-CREB (cAMP response element-binding protein) signaling in depressed alcoholics, underscoring the conserved nature of neurotrophic disruptions across species

Degnan, P

Some clinics also provide the convenience of walk-in services, making it easy to pop in for your injection without needing a scheduled appointment