Try a B12 Shot or home injection
IGF1 LR3, while still subject to some control mechanisms, provides more direct and predictable receptor start with less complex feedback control
People often say they look younger, and there is legitimate science behind this
References Guevara-Aguirre J, Balasubramanian P, Guevara-Aguirre M, Wei M, Madia F, Cheng CW, Wei M, Hwang D, Martin-Montalvo A, Saavedra J, Ingles S, de Cabo R, Cohen P, Longo VD: Growth hormone receptor deficiency is associated with a major reduction in pro-aging signaling, cancer, and diabetes in humans
T4 medications like levothyroxine can work well for many thyroid patients when delivered properly, so do not dismiss T4 entirely just because the oral form has not worked for you